Subject: Re: [Fot] IRS diff overheating

From: Jamie Palmer <[email-masked]>
Date: Tue, 2 Jun 2015 17:50:50 +0000 (UTC)

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Greg, we used to have issues with the RiffRAF TR6 (ChumpCar) until we went =
with Redline. =C2=A0Never looked back, no issues from that point on. =C2=A0=
I also use it in the LeMons Marina without issue.
Good Luck!
=20
      From: Greg And Alison Blake <[email-masked]>
 To: Amici Triumphi <[email-masked]>=20
 Sent: Tuesday, June 2, 2015 1:40 PM
 Subject: [Fot] IRS diff overheating
  =20
Some of yall may have followed the social Media posts provided by our teamm=
ates through the weekend. We were racing the Beanitos TR6 this past weekend=
 at what was to be TWS's last ever race. It was a split 16 hour endurance r=
ace (Sat&Sun).=20

We had a strange failure on Saturday. About 6 hours in, the truck was full =
of gear oil. I had routed a diff vent line to the trunk. Upon returning to =
the garage, we discovered melted poly diff mounts. Pic below.=20

I've been scratching my head on this one. Prior to boiling the diff fluid, =
we had zero leaks in the freshly serviced diff. I had replaced all seals an=
d filled with STALUBE 90WT GL4.=20

I've been racing my TR3 using this same diff fluid for 6 years (replaced ev=
ery two weekends). Never a problem with my vintage race car. Of course, I'v=
e never run the 3 for 6 hours straight.=20

Some of the more seasoned endurance racers asked what fluid I had in the di=
ff. All suggested that mineral based fluid is not a good choice for enduran=
ce events.=20

I'd love to hear opinions as to the route cause of our failure and more imp=
ortantly, suggested remedies.=20

As to the results, the car was running consistently 2:1x laps with a fast l=
ap of 2:10. We ended up taking the workers choice award. Had we run w/o dif=
f failure and a subsequent battery failure, we could have been in the hunt =
for a podium finish. Fastest lap in our group was 2:09.9

Great weekend

Thanks=20
Greg
_______________________________________________
[email-masked]

http://www.fot-racing.com

Archive: http://www.team.net/archive
oo.com

  =20

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<html><body><div style=3D"color:#000; background-color:#fff; font-family:He=
lveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;fo=
nt-size:16px"><div><span>Greg, we used to have issues with the RiffRAF TR6 =
(ChumpCar) until we went with Redline. &nbsp;Never looked back, no issues f=
rom that point on. &nbsp;I also use it in the LeMons Marina without issue.<=
/span></div><div><span><br></span></div><div><span>Good Luck!</span></div><=
br> <blockquote style=3D"border-left: 2px solid rgb(16, 16, 255); margin-le=
ft: 5px; margin-top: 5px; padding-left: 5px;" id=3D"yui_3_16_0_1_1433243892=
209_215566">  <div style=3D"font-family: HelveticaNeue, Helvetica Neue, Hel=
vetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id=3D"yui_3_16_=
0_1_1433243892209_215565"> <div style=3D"font-family: HelveticaNeue, Helvet=
ica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id=
=3D"yui_3_16_0_1_1433243892209_215564"> <div dir=3D"ltr" id=3D"yui_3_16_0_1=
_1433243892209_215563"> <hr size=3D"1">  <font size=3D"2" face=3D"Arial" id=
=3D"yui_3_16_0_1_1433243892209_215567"> <b><span style=3D"font-weight:bold;=
">From:</span></b> Greg And Alison Blake &lt;[email-masked]&gt;<br> =
<b><span style=3D"font-weight: bold;">To:</span></b> Amici Triumphi &lt;fot=
@autox.team.net&gt; <br> <b><span style=3D"font-weight: bold;">Sent:</span>=
</b> Tuesday, June 2, 2015 1:40 PM<br> <b><span style=3D"font-weight: bold;=
">Subject:</span></b> [Fot] IRS diff overheating<br> </font> </div> <div cl=
ass=3D"y_msg_container" id=3D"yui_3_16_0_1_1433243892209_215568"><br>Some o=
f yall may have followed the social Media posts provided by our teammates t=
hrough the weekend. We were racing the Beanitos TR6 this past weekend at wh=
at was to be TWS's last ever race. It was a split 16 hour endurance race (S=
at&amp;Sun). <br><br>We had a strange failure on Saturday. About 6 hours in=
, the truck was full of gear oil. I had routed a diff vent line to the trun=
k. Upon returning to the garage, we discovered melted poly diff mounts. Pic=
 below. <br><br>I've been scratching my head on this one. Prior to boiling =
the diff fluid, we had zero leaks in the freshly serviced diff. I had repla=
ced all seals and filled with STALUBE 90WT GL4. <br><br>I've been racing my=
 TR3 using this same diff fluid for 6 years (replaced every two weekends). =
Never a problem with my vintage race car. Of course, I've never run the 3 f=
or 6 hours straight. <br><br>Some of the more seasoned endurance racers ask=
ed what fluid I had in the diff. All suggested that mineral based fluid is =
not a good choice for endurance events. <br><br>I'd love to hear opinions a=
s to the route cause of our failure and more importantly, suggested remedie=
s. <br><br>As to the results, the car was running consistently 2:1x laps wi=
th a fast lap of 2:10. We ended up taking the workers choice award. Had we =
run w/o diff failure and a subsequent battery failure, we could have been i=
n the hunt for a podium finish. Fastest lap in our group was 2:09.9<br><br>=
Great weekend<br><br><br><br>Thanks <br>Greg<br>___________________________=
____________________<br><a ymailto=3D"mailto:[email-masked]" href=3D"ma=
ilto:[email-masked]" id=3D"yui_3_16_0_1_1433243892209_215586">fot@autox=
.team.net</a><br><br><a href=3D"http://www.fot-racing.com/" target=3D"_blan=
k" id=3D"yui_3_16_0_1_1433243892209_215587">http://www.fot-racing.com</a><b=
r><br>Donate: <a href=3D"http://www.team.net/donate.html" target=3D"_blank"=
>http://www.team.net/donate.html</a><br>Archive: <a href=3D"http://www.team=
.net/archive" target=3D"_blank">http://www.team.net/archive</a><br>Forums: =
<a href=3D"http://www.team.net/forums" target=3D"_blank">http://www.team.ne=
t/forums</a><br>Unsubscribe/Manage: <a href=3D"http://autox.team.net/mailma=
n/options/fot/[email-masked]" target=3D"_blank">http://autox.team.net/=
mailman/options/fot/[email-masked]</a><br><br><br><br><br></div> </div=
> </div> </blockquote>  </div></body></html>
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_______________________________________________
[email-masked]

http://www.fot-racing.com

Archive: http://www.team.net/archive

--===============8389936392163397522==--

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From: Kas Kastner <[email-masked]>
Date: Tue, 2 Jun 2015 12:01:38 -0700

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I had failure of all three cars at Sebring with the IRS cars. In practices
the diffs overheated and puked oil out the breather tub as you describe. I
laid part of it to a new diff but most to the heat generated by a disc type
limited slip. The capacity of the diff is marginal for endurance
running. Add to the  capacity or add a cooler.

*Never be beaten by equipment.*

On Tue, Jun 2, 2015 at 10:40 AM, Greg And Alison Blake <
[email-masked]> wrote:

> Some of yall may have followed the social Media posts provided by our
> teammates through the weekend. We were racing the Beanitos TR6 this past
> weekend at what was to be TWS's last ever race. It was a split 16 hour
> endurance race (Sat&Sun).
>
> We had a strange failure on Saturday. About 6 hours in, the truck was full
> of gear oil. I had routed a diff vent line to the trunk. Upon returning to
> the garage, we discovered melted poly diff mounts. Pic below.
>
> I've been scratching my head on this one. Prior to boiling the diff fluid,
> we had zero leaks in the freshly serviced diff. I had replaced all seals
> and filled with STALUBE 90WT GL4.
>
> I've been racing my TR3 using this same diff fluid for 6 years (replaced
> every two weekends). Never a problem with my vintage race car. Of course,
> I've never run the 3 for 6 hours straight.
>
> Some of the more seasoned endurance racers asked what fluid I had in the
> diff. All suggested that mineral based fluid is not a good choice for
> endurance events.
>
> I'd love to hear opinions as to the route cause of our failure and more
> importantly, suggested remedies.
>
> As to the results, the car was running consistently 2:1x laps with a fast
> lap of 2:10. We ended up taking the workers choice award. Had we run w/o
> diff failure and a subsequent battery failure, we could have been in the
> hunt for a podium finish. Fastest lap in our group was 2:09.9
>
> Great weekend
>
>
>
>
> Thanks
> Greg
> Donate: http://www.team.net/donate.html
> Forums: http://www.team.net/forums
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/fot/[email-masked]
>
>
>
>

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<div dir=3D"ltr">I had failure of all three cars at Sebring with the IRS ca=
rs. In practices the diffs overheated and puked oil out the breather tub as=
 you describe. I laid part of it to a new diff but most to the heat generat=
ed by a disc type limited slip. The capacity of the diff is marginal for en=
durance running.=C2=A0Add to the=C2=A0=C2=A0capacity or add a cooler.=C2=A0=
</div><div class=3D"gmail_extra"><br clear=3D"all"><div><div class=3D"gmail=
_signature"><p><strong><font color=3D"#000099">Never be beaten by equipment=
.</font></strong></p></div></div>
<br><div class=3D"gmail_quote">On Tue, Jun 2, 2015 at 10:40 AM, Greg And Al=
ison Blake <span dir=3D"ltr">&lt;<a href=3D"mailto:[email-masked]" t=
arget=3D"_blank">[email-masked]</a>&gt;</span> wrote:<br><blockquote=
 class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex">Some of yall may have followed the social Media posts p=
rovided by our teammates through the weekend. We were racing the Beanitos T=
R6 this past weekend at what was to be TWS&#39;s last ever race. It was a s=
plit 16 hour endurance race (Sat&amp;Sun).<br>
<br>
We had a strange failure on Saturday. About 6 hours in, the truck was full =
of gear oil. I had routed a diff vent line to the trunk. Upon returning to =
the garage, we discovered melted poly diff mounts. Pic below.<br>
<br>
I&#39;ve been scratching my head on this one. Prior to boiling the diff flu=
id, we had zero leaks in the freshly serviced diff. I had replaced all seal=
s and filled with STALUBE 90WT GL4.<br>
<br>
I&#39;ve been racing my TR3 using this same diff fluid for 6 years (replace=
d every two weekends). Never a problem with my vintage race car. Of course,=
 I&#39;ve never run the 3 for 6 hours straight.<br>
<br>
Some of the more seasoned endurance racers asked what fluid I had in the di=
ff. All suggested that mineral based fluid is not a good choice for enduran=
ce events.<br>
<br>
I&#39;d love to hear opinions as to the route cause of our failure and more=
 importantly, suggested remedies.<br>
<br>
As to the results, the car was running consistently 2:1x laps with a fast l=
ap of 2:10. We ended up taking the workers choice award. Had we run w/o dif=
f failure and a subsequent battery failure, we could have been in the hunt =
for a podium finish. Fastest lap in our group was 2:09.9<br>
<br>
Great weekend<br>
<br>
<br><br>
<br>
Thanks<br>
Greg<br>_______________________________________________<br>
<a href=3D"mailto:[email-masked]">[email-masked]</a><br>
<br>
<a href=3D"http://www.fot-racing.com" target=3D"_blank">http://www.fot-raci=
ng.com</a><br>
<br>
//www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/archive" target=3D"_blank">http://w=
ww.team.net/archive</a><br>
Forums: <a href=3D"http://www.team.net/forums" target=3D"_blank">http://www=
.team.net/forums</a><br>
[email-masked]" target=3D"_blank">http://autox.team.net/mailman/options=
/fot/[email-masked]</a><br>
<br>
<br>
<br></blockquote></div><br></div>

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From: Keith Files <[email-masked]>
Date: Tue, 2 Jun 2015 22:19:16 +0100

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We use a diff cooler to avoid the problem on the TR6, a lot cheaper than con=
tinual rebuilds of the diff. I ran with one doing 3 hours of the Nurburgring=
 Nordschleife a couple of years ago, it worked perfectly.

Keith

Sent from my iPad

> On 2 Jun 2015, at 20:01, Kas Kastner <[email-masked]> wrote:
>=20
> I had failure of all three cars at Sebring with the IRS cars. In practices=
 the diffs overheated and puked oil out the breather tub as you describe. I l=
aid part of it to a new diff but most to the heat generated by a disc type l=
imited slip. The capacity of the diff is marginal for endurance running. Add=
 to the  capacity or add a cooler.=20
>=20
> Never be beaten by equipment.
>=20
>=20
>> On Tue, Jun 2, 2015 at 10:40 AM, Greg And Alison Blake <[email-masked]=
.com> wrote:
>> Some of yall may have followed the social Media posts provided by our tea=
mmates through the weekend. We were racing the Beanitos TR6 this past weeken=
d at what was to be TWS's last ever race. It was a split 16 hour endurance r=
ace (Sat&Sun).
>>=20
>> We had a strange failure on Saturday. About 6 hours in, the truck was ful=
l of gear oil. I had routed a diff vent line to the trunk. Upon returning to=
 the garage, we discovered melted poly diff mounts. Pic below.
>>=20
>> I've been scratching my head on this one. Prior to boiling the diff fluid=
, we had zero leaks in the freshly serviced diff. I had replaced all seals a=
nd filled with STALUBE 90WT GL4.
>>=20
>> I've been racing my TR3 using this same diff fluid for 6 years (replaced e=
very two weekends). Never a problem with my vintage race car. Of course, I'v=
e never run the 3 for 6 hours straight.
>>=20
>> Some of the more seasoned endurance racers asked what fluid I had in the d=
iff. All suggested that mineral based fluid is not a good choice for enduran=
ce events.
>>=20
>> I'd love to hear opinions as to the route cause of our failure and more i=
mportantly, suggested remedies.
>>=20
>> As to the results, the car was running consistently 2:1x laps with a fast=
 lap of 2:10. We ended up taking the workers choice award. Had we run w/o di=
ff failure and a subsequent battery failure, we could have been in the hunt f=
or a podium finish. Fastest lap in our group was 2:09.9
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/kaskastner@=
gmail.com
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/keithfiles@b=
tinternet.com

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>We use a diff cooler to avoid the prob=
lem on the TR6, a lot cheaper than continual rebuilds of the diff. I ran wit=
h one doing 3 hours of the Nurburgring Nordschleife a couple of years ago, i=
t worked perfectly.</div><div><br></div><div>Keith<br><br>Sent from my iPad<=
/div><div><br>On 2 Jun 2015, at 20:01, Kas Kastner &lt;<a href=3D"mailto:kas=
[email-masked]">[email-masked]</a>&gt; wrote:<br><br></div><blockqu=
ote type=3D"cite"><div><div dir=3D"ltr">I had failure of all three cars at S=
ebring with the IRS cars. In practices the diffs overheated and puked oil ou=
t the breather tub as you describe. I laid part of it to a new diff but most=
 to the heat generated by a disc type limited slip. The capacity of the diff=
 is marginal for endurance running.&nbsp;Add to the&nbsp;&nbsp;capacity or a=
dd a cooler.&nbsp;</div><div class=3D"gmail_extra"><br clear=3D"all"><div><d=
iv class=3D"gmail_signature"><p><strong><font color=3D"#000099">Never be bea=
ten by equipment.</font></strong></p></div></div>
<br><div class=3D"gmail_quote">On Tue, Jun 2, 2015 at 10:40 AM, Greg And Ali=
son Blake <span dir=3D"ltr">&lt;<a href=3D"mailto:[email-masked]" tar=
get=3D"_blank">[email-masked]</a>&gt;</span> wrote:<br><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pa=
dding-left:1ex">Some of yall may have followed the social Media posts provid=
ed by our teammates through the weekend. We were racing the Beanitos TR6 thi=
s past weekend at what was to be TWS's last ever race. It was a split 16 hou=
r endurance race (Sat&amp;Sun).<br>
<br>
We had a strange failure on Saturday. About 6 hours in, the truck was full o=
f gear oil. I had routed a diff vent line to the trunk. Upon returning to th=
e garage, we discovered melted poly diff mounts. Pic below.<br>
<br>
I've been scratching my head on this one. Prior to boiling the diff fluid, w=
e had zero leaks in the freshly serviced diff. I had replaced all seals and f=
illed with STALUBE 90WT GL4.<br>
<br>
I've been racing my TR3 using this same diff fluid for 6 years (replaced eve=
ry two weekends). Never a problem with my vintage race car. Of course, I've n=
ever run the 3 for 6 hours straight.<br>
<br>
Some of the more seasoned endurance racers asked what fluid I had in the dif=
f. All suggested that mineral based fluid is not a good choice for endurance=
 events.<br>
<br>
I'd love to hear opinions as to the route cause of our failure and more impo=
rtantly, suggested remedies.<br>
<br>
As to the results, the car was running consistently 2:1x laps with a fast la=
p of 2:10. We ended up taking the workers choice award. Had we run w/o diff f=
ailure and a subsequent battery failure, we could have been in the hunt for a=
 podium finish. Fastest lap in our group was 2:09.9<br>
<br>
Great weekend<br>
<br>
<br><br>
<br>
Thanks<br>
Greg<br>_______________________________________________<br>
<a href=3D"mailto:[email-masked]">[email-masked]</a><br>
<br>
<a href=3D"http://www.fot-racing.com" target=3D"_blank">http://www.fot-racin=
g.com</a><br>
<br>
/www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/archive" target=3D"_blank">http://ww=
w.team.net/archive</a><br>
Forums: <a href=3D"http://www.team.net/forums" target=3D"_blank">http://www.=
team.net/forums</a><br>
[email-masked]" target=3D"_blank">http://autox.team.net/mailman/options/f=
ot/[email-masked]</a><br>
<br>
<br>
<br></blockquote></div><br></div>
</div></blockquote><blockquote type=3D"cite"><div><span>____________________=
___________________________</span><br><span><a href=3D"mailto:[email-masked]=
.net">[email-masked]</a></span><br><span></span><br><span><a href=3D"htt=
p://www.fot-racing.com">http://www.fot-racing.com</a></span><br><span></span=
><br><span>Donate: <a href=3D"http://www.team.net/donate.html">http://www.te=
am.net/donate.html</a></span><br><span>Archive: <a href=3D"http://www.team.n=
et/archive">http://www.team.net/archive</a></span><br><span>Forums: <a href=3D=
"http://www.team.net/forums">http://www.team.net/forums</a></span><br><span>=
[email-masked]">http://autox.team.net/mailman/options/fot/keithfiles=
@btinternet.com</a></span><br><span></span><br><span></span><br></div></bloc=
kquote></body></html>=

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From: Greg And Alison Blake <[email-masked]>
Date: Tue, 2 Jun 2015 16:26:59 -0500

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Keith

Can you send me info in this?  I assume it requires an external fluid pump.

Thanks,

Greg

> On Jun 2, 2015, at 4:19 PM, Keith Files <[email-masked]> wrote:=

>=20
> We use a diff cooler to avoid the problem on the TR6, a lot cheaper than c=
ontinual rebuilds of the diff. I ran with one doing 3 hours of the Nurburgri=
ng Nordschleife a couple of years ago, it worked perfectly.
>> I had failure of all three cars at Sebring with the IRS cars. In practice=
s the diffs overheated and puked oil out the breather tub as you describe. I=
 laid part of it to a new diff but most to the heat generated by a disc type=
 limited slip. The capacity of the diff is marginal for endurance running. A=
dd to the  capacity or add a cooler.=20
>>> On Tue, Jun 2, 2015 at 10:40 AM, Greg And Alison Blake <[email-masked]=
r.com> wrote:
>>> Some of yall may have followed the social Media posts provided by our te=
ammates through the weekend. We were racing the Beanitos TR6 this past weeke=
nd at what was to be TWS's last ever race. It was a split 16 hour endurance r=
ace (Sat&Sun).
>>>=20
>>> We had a strange failure on Saturday. About 6 hours in, the truck was fu=
ll of gear oil. I had routed a diff vent line to the trunk. Upon returning t=
o the garage, we discovered melted poly diff mounts. Pic below.
>>>=20
>>> I've been scratching my head on this one. Prior to boiling the diff flui=
d, we had zero leaks in the freshly serviced diff. I had replaced all seals a=
nd filled with STALUBE 90WT GL4.
>>>=20
>>> I've been racing my TR3 using this same diff fluid for 6 years (replaced=
 every two weekends). Never a problem with my vintage race car. Of course, I=
've never run the 3 for 6 hours straight.
>>>=20
>>> Some of the more seasoned endurance racers asked what fluid I had in the=
 diff. All suggested that mineral based fluid is not a good choice for endur=
ance events.
>>>=20
>>> As to the results, the car was running consistently 2:1x laps with a fas=
t lap of 2:10. We ended up taking the workers choice award. Had we run w/o d=
iff failure and a subsequent battery failure, we could have been in the hunt=
 for a podium finish. Fastest lap in our group was 2:09.9
>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/kaskastner=
@gmail.com
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/keithfiles@=
btinternet.com

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>Keith</div><div><br></div><div>Can you=
 send me info in this? &nbsp;I assume it requires an external fluid pump.</d=
iv><div><br></div><div>Thanks,</div><div><br></div><div>Greg<br><br><br></di=
v><div><br>On Jun 2, 2015, at 4:19 PM, Keith Files &lt;<a href=3D"mailto:kei=
[email-masked]">[email-masked]</a>&gt; wrote:<br><br></di=
v><blockquote type=3D"cite"><div><meta http-equiv=3D"content-type" content=3D=
"text/html; charset=3Dutf-8"><div>We use a diff cooler to avoid the problem o=
n the TR6, a lot cheaper than continual rebuilds of the diff. I ran with one=
 doing 3 hours of the Nurburgring Nordschleife a couple of years ago, it wor=
ked perfectly.</div><div><br></div><div>Keith<br><br>Sent from my iPad</div>=
<div><br>On 2 Jun 2015, at 20:01, Kas Kastner &lt;<a href=3D"mailto:kaskastn=
[email-masked]">[email-masked]</a>&gt; wrote:<br><br></div><blockquote t=
ype=3D"cite"><div><div dir=3D"ltr">I had failure of all three cars at Sebrin=
g with the IRS cars. In practices the diffs overheated and puked oil out the=
 breather tub as you describe. I laid part of it to a new diff but most to t=
he heat generated by a disc type limited slip. The capacity of the diff is m=
arginal for endurance running.&nbsp;Add to the&nbsp;&nbsp;capacity or add a c=
ooler.&nbsp;</div><div class=3D"gmail_extra"><br clear=3D"all"><div><div cla=
ss=3D"gmail_signature"><p><strong><font color=3D"#000099">Never be beaten by=
 equipment.</font></strong></p></div></div>
<br><div class=3D"gmail_quote">On Tue, Jun 2, 2015 at 10:40 AM, Greg And Ali=
son Blake <span dir=3D"ltr">&lt;<a href=3D"mailto:[email-masked]" tar=
get=3D"_blank">[email-masked]</a>&gt;</span> wrote:<br><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pa=
dding-left:1ex">Some of yall may have followed the social Media posts provid=
ed by our teammates through the weekend. We were racing the Beanitos TR6 thi=
s past weekend at what was to be TWS's last ever race. It was a split 16 hou=
r endurance race (Sat&amp;Sun).<br>
<br>
We had a strange failure on Saturday. About 6 hours in, the truck was full o=
f gear oil. I had routed a diff vent line to the trunk. Upon returning to th=
e garage, we discovered melted poly diff mounts. Pic below.<br>
<br>
I've been scratching my head on this one. Prior to boiling the diff fluid, w=
e had zero leaks in the freshly serviced diff. I had replaced all seals and f=
illed with STALUBE 90WT GL4.<br>
<br>
I've been racing my TR3 using this same diff fluid for 6 years (replaced eve=
ry two weekends). Never a problem with my vintage race car. Of course, I've n=
ever run the 3 for 6 hours straight.<br>
<br>
Some of the more seasoned endurance racers asked what fluid I had in the dif=
f. All suggested that mineral based fluid is not a good choice for endurance=
 events.<br>
<br>
I'd love to hear opinions as to the route cause of our failure and more impo=
rtantly, suggested remedies.<br>
<br>
As to the results, the car was running consistently 2:1x laps with a fast la=
p of 2:10. We ended up taking the workers choice award. Had we run w/o diff f=
ailure and a subsequent battery failure, we could have been in the hunt for a=
 podium finish. Fastest lap in our group was 2:09.9<br>
<br>
Great weekend<br>
<br>
<br><br>
<br>
Thanks<br>
Greg<br>_______________________________________________<br>
<a href=3D"mailto:[email-masked]">[email-masked]</a><br>
<br>
<a href=3D"http://www.fot-racing.com" target=3D"_blank">http://www.fot-racin=
g.com</a><br>
<br>
/www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/archive" target=3D"_blank">http://ww=
w.team.net/archive</a><br>
Forums: <a href=3D"http://www.team.net/forums" target=3D"_blank">http://www.=
team.net/forums</a><br>
[email-masked]" target=3D"_blank">http://autox.team.net/mailman/options/f=
ot/[email-masked]</a><br>
<br>
<br>
<br></blockquote></div><br></div>
</div></blockquote><blockquote type=3D"cite"><div><span>____________________=
___________________________</span><br><span><a href=3D"mailto:[email-masked]=
.net">[email-masked]</a></span><br><span></span><br><span><a href=3D"htt=
p://www.fot-racing.com">http://www.fot-racing.com</a></span><br><span></span=
kquote></div></blockquote></body></html>=

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---

From: Keith Files <[email-masked]>
Date: Tue, 2 Jun 2015 22:35:16 +0100

--===============5551512809549387962==
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	charset=us-ascii
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Sure. I will also send you some pictures when I get the car back in 2 weeks t=
ime.

What we did was to buy a small 6 row cooler (I think but will check)  that w=
e mounted to the boot (trunk) floor by the inner rear valance. We cut a larg=
e hole  (8"x 3" or so) in the boot floor just in front of the oil cooler and=
 manufactured an air scoop which we attached to the underside of the boot fl=
oor. The cooler pipes were attached to the diff and cooler and driven by an o=
ld Lucas fuel pump.

As I said I will send you photo's and more precise measurements when I get t=
he car back from the workshop.

Hope the above helps for now.

Keith

Sent from my iPad

> On 2 Jun 2015, at 22:26, Greg And Alison Blake <[email-masked]> wro=
te:
>=20
> Keith
>=20
> Can you send me info in this?  I assume it requires an external fluid pump=
.
>=20
> Thanks,
>=20
> Greg
>=20
>=20
>=20
>> On Jun 2, 2015, at 4:19 PM, Keith Files <[email-masked]> wrote=
>>> I had failure of all three cars at Sebring with the IRS cars. In practic=
es the diffs overheated and puked oil out the breather tub as you describe. I=
 laid part of it to a new diff but most to the heat generated by a disc type=
 limited slip. The capacity of the diff is marginal for endurance running. A=
dd to the  capacity or add a cooler.=20
>>>> On Tue, Jun 2, 2015 at 10:40 AM, Greg And Alison Blake <ablake2@austin.=
rr.com> wrote:
>>>> Some of yall may have followed the social Media posts provided by our t=
eammates through the weekend. We were racing the Beanitos TR6 this past week=
end at what was to be TWS's last ever race. It was a split 16 hour endurance=
 race (Sat&Sun).
>>>>=20
>>>> We had a strange failure on Saturday. About 6 hours in, the truck was f=
ull of gear oil. I had routed a diff vent line to the trunk. Upon returning t=
o the garage, we discovered melted poly diff mounts. Pic below.
>>>>=20
>>>> I've been scratching my head on this one. Prior to boiling the diff flu=
id, we had zero leaks in the freshly serviced diff. I had replaced all seals=
 and filled with STALUBE 90WT GL4.
>>>>=20
>>>> I've been racing my TR3 using this same diff fluid for 6 years (replace=
d every two weekends). Never a problem with my vintage race car. Of course, I=
've never run the 3 for 6 hours straight.
>>>>=20
>>>> Some of the more seasoned endurance racers asked what fluid I had in th=
e diff. All suggested that mineral based fluid is not a good choice for endu=
rance events.
>>>>=20
>>>> I'd love to hear opinions as to the route cause of our failure and more=
>>>>=20
>>>> As to the results, the car was running consistently 2:1x laps with a fa=
st lap of 2:10. We ended up taking the workers choice award. Had we run w/o d=
iff failure and a subsequent battery failure, we could have been in the hunt=
 for a podium finish. Fastest lap in our group was 2:09.9
>>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/kaskastne=
[email-masked]
>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/keithfiles=
@btinternet.com

--Apple-Mail-8143EBD1-E2C6-45B0-ADCF-EE58F736FAB3
	charset=utf-8
Content-Transfer-Encoding: quoted-printable

<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>Sure. I will also send you some pictur=
es when I get the car back in 2 weeks time.</div><div><br></div><div>What we=
 did was to buy a small 6 row cooler (I think but will check) &nbsp;that we m=
ounted to the boot (trunk) floor by the inner rear valance. We cut a large h=
ole &nbsp;(8"x 3" or so) in the boot floor just in front of the oil cooler a=
nd manufactured an air scoop which we attached to the underside of the boot f=
loor. The cooler pipes were attached to the diff and cooler and driven by an=
 old Lucas fuel pump.</div><div><br></div><div>As I said I will send you pho=
to's and more precise measurements when I get the car back from the workshop=
.</div><div><br></div><div>Hope the above helps for now.</div><div><br></div=
><div>Keith<br><br>Sent from my iPad</div><div><br>On 2 Jun 2015, at 22:26, G=
reg And Alison Blake &lt;<a href=3D"mailto:[email-masked]">ablake2@au=
stin.rr.com</a>&gt; wrote:<br><br></div><blockquote type=3D"cite"><div><meta=
 http-equiv=3D"content-type" content=3D"text/html; charset=3Dutf-8"><div>Kei=
th</div><div><br></div><div>Can you send me info in this? &nbsp;I assume it r=
equires an external fluid pump.</div><div><br></div><div>Thanks,</div><div><=
br></div><div>Greg<br><br><br></div><div><br>On Jun 2, 2015, at 4:19 PM, Kei=
th Files &lt;<a href=3D"mailto:[email-masked]">keithfiles@btinter=
net.com</a>&gt; wrote:<br><br></div><blockquote type=3D"cite"><div><meta htt=
p-equiv=3D"content-type" content=3D"text/html; charset=3Dutf-8"><div>We use a=
 diff cooler to avoid the problem on the TR6, a lot cheaper than continual r=
ebuilds of the diff. I ran with one doing 3 hours of the Nurburgring Nordsch=
leife a couple of years ago, it worked perfectly.</div><div><br></div><div>K=
eith<br><br>Sent from my iPad</div><div><br>On 2 Jun 2015, at 20:01, Kas Kas=
tner &lt;<a href=3D"mailto:[email-masked]">[email-masked]</a>&gt=
; wrote:<br><br></div><blockquote type=3D"cite"><div><div dir=3D"ltr">I had f=
ailure of all three cars at Sebring with the IRS cars. In practices the diff=
s overheated and puked oil out the breather tub as you describe. I laid part=
 of it to a new diff but most to the heat generated by a disc type limited s=
lip. The capacity of the diff is marginal for endurance running.&nbsp;Add to=
 the&nbsp;&nbsp;capacity or add a cooler.&nbsp;</div><div class=3D"gmail_ext=
ra"><br clear=3D"all"><div><div class=3D"gmail_signature"><p><strong><font c=
olor=3D"#000099">Never be beaten by equipment.</font></strong></p></div></di=
v>
<br><div class=3D"gmail_quote">On Tue, Jun 2, 2015 at 10:40 AM, Greg And Ali=
son Blake <span dir=3D"ltr">&lt;<a href=3D"mailto:[email-masked]" tar=
get=3D"_blank">[email-masked]</a>&gt;</span> wrote:<br><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pa=
dding-left:1ex">Some of yall may have followed the social Media posts provid=
ed by our teammates through the weekend. We were racing the Beanitos TR6 thi=
s past weekend at what was to be TWS's last ever race. It was a split 16 hou=
r endurance race (Sat&amp;Sun).<br>
<br>
We had a strange failure on Saturday. About 6 hours in, the truck was full o=
f gear oil. I had routed a diff vent line to the trunk. Upon returning to th=
e garage, we discovered melted poly diff mounts. Pic below.<br>
<br>
I've been scratching my head on this one. Prior to boiling the diff fluid, w=
e had zero leaks in the freshly serviced diff. I had replaced all seals and f=
illed with STALUBE 90WT GL4.<br>
<br>
I've been racing my TR3 using this same diff fluid for 6 years (replaced eve=
ry two weekends). Never a problem with my vintage race car. Of course, I've n=
ever run the 3 for 6 hours straight.<br>
<br>
Some of the more seasoned endurance racers asked what fluid I had in the dif=
f. All suggested that mineral based fluid is not a good choice for endurance=
 events.<br>
<br>
I'd love to hear opinions as to the route cause of our failure and more impo=
rtantly, suggested remedies.<br>
<br>
As to the results, the car was running consistently 2:1x laps with a fast la=
p of 2:10. We ended up taking the workers choice award. Had we run w/o diff f=
ailure and a subsequent battery failure, we could have been in the hunt for a=
 podium finish. Fastest lap in our group was 2:09.9<br>
<br>
Great weekend<br>
<br>
<br><br>
<br>
Thanks<br>
Greg<br>_______________________________________________<br>
<a href=3D"mailto:[email-masked]">[email-masked]</a><br>
<br>
<a href=3D"http://www.fot-racing.com" target=3D"_blank">http://www.fot-racin=
g.com</a><br>
<br>
/www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/archive" target=3D"_blank">http://ww=
w.team.net/archive</a><br>
Forums: <a href=3D"http://www.team.net/forums" target=3D"_blank">http://www.=
team.net/forums</a><br>
[email-masked]" target=3D"_blank">http://autox.team.net/mailman/options/f=
ot/[email-masked]</a><br>
<br>
<br>
<br></blockquote></div><br></div>
</div></blockquote><blockquote type=3D"cite"><div><span>____________________=
___________________________</span><br><span><a href=3D"mailto:[email-masked]=
.net">[email-masked]</a></span><br><span></span><br><span><a href=3D"htt=
p://www.fot-racing.com">http://www.fot-racing.com</a></span><br><span></span=
kquote></div></blockquote></div></blockquote></body></html>=

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--===============5551512809549387962==--

---

From: Bill Babcock <[email-masked]>
Date: Tue, 2 Jun 2015 15:32:07 -0700

--===============8529268248516463490==

--Apple-Mail=_CA584408-78AC-476A-BAC6-E0D6800CC7DA
Content-Transfer-Encoding: quoted-printable
	charset=utf-8

I don=E2=80=99t know if you=E2=80=99ve seen the diff cover on Peyote. I =
don=E2=80=99t remember where I got it, but it sure solved my diff =
overheating problems. If nothing else the sheer mass of aluminum helps, =
but it=E2=80=99s deeply finned. I=E2=80=99ve put temp sensing paint on =
it a few times and the outside of the cover never gets above 170F. the =
cast steel banjo never gets above 180F.  I doubt the oil gets much above =
250=E2=80=94there=E2=80=99s none of toasty sulfur smell when I drain it.=20=

> On Jun 2, 2015, at 2:19 PM, Keith Files <[email-masked]> =
wrote:
>=20
> We use a diff cooler to avoid the problem on the TR6, a lot cheaper =
than continual rebuilds of the diff. I ran with one doing 3 hours of the =
Nurburgring Nordschleife a couple of years ago, it worked perfectly.
>=20
> Keith
>=20
> Sent from my iPad
>=20
> On 2 Jun 2015, at 20:01, Kas Kastner <[email-masked] =
>=20
>> I had failure of all three cars at Sebring with the IRS cars. In =
practices the diffs overheated and puked oil out the breather tub as you =
describe. I laid part of it to a new diff but most to the heat generated =
by a disc type limited slip. The capacity of the diff is marginal for =
endurance running. Add to the  capacity or add a cooler.=20
>> On Tue, Jun 2, 2015 at 10:40 AM, Greg And Alison Blake =
>> Some of yall may have followed the social Media posts provided by our =
teammates through the weekend. We were racing the Beanitos TR6 this past =
weekend at what was to be TWS's last ever race. It was a split 16 hour =
endurance race (Sat&Sun).
>>=20
>> We had a strange failure on Saturday. About 6 hours in, the truck was =
full of gear oil. I had routed a diff vent line to the trunk. Upon =
returning to the garage, we discovered melted poly diff mounts. Pic =
below.
>>=20
>> I've been scratching my head on this one. Prior to boiling the diff =
fluid, we had zero leaks in the freshly serviced diff. I had replaced =
all seals and filled with STALUBE 90WT GL4.
>>=20
>> I've been racing my TR3 using this same diff fluid for 6 years =
(replaced every two weekends). Never a problem with my vintage race car. =
Of course, I've never run the 3 for 6 hours straight.
>>=20
>> Some of the more seasoned endurance racers asked what fluid I had in =
the diff. All suggested that mineral based fluid is not a good choice =
for endurance events.
>>=20
>> I'd love to hear opinions as to the route cause of our failure and =
more importantly, suggested remedies.
>>=20
>> As to the results, the car was running consistently 2:1x laps with a =
fast lap of 2:10. We ended up taking the workers choice award. Had we =
run w/o diff failure and a subsequent battery failure, we could have =
been in the hunt for a podium finish. Fastest lap in our group was =
2:09.9
>> http://www.fot-racing.com <http://www.fot-racing.com/>
>>=20
>> Donate: http://www.team.net/donate.html =
<http://www.team.net/donate.html>
>> Archive: http://www.team.net/archive <http://www.team.net/archive>
>> Forums: http://www.team.net/forums <http://www.team.net/forums>
>> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/fot/[email-masked] =
<http://autox.team.net/mailman/options/fot/[email-masked]>
>> http://www.fot-racing.com <http://www.fot-racing.com/>
>>=20
>> Donate: http://www.team.net/donate.html =
<http://www.team.net/donate.html>
>> Archive: http://www.team.net/archive <http://www.team.net/archive>
>> Forums: http://www.team.net/forums <http://www.team.net/forums>
>> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/fot/[email-masked] =
<http://autox.team.net/mailman/options/fot/[email-masked]>
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/fot/[email-masked]

Bill Babcock
[email-masked]
Editor: Ponostyle
Celebrating Water

Editor: Xtreme Geezer
Fitness and Fun After Forty
503.936.7660
http://www.PonoStyle.com
http://www.Xgeez.com

--Apple-Mail=_CA584408-78AC-476A-BAC6-E0D6800CC7DA
Content-Transfer-Encoding: quoted-printable
	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">I don=E2=80=99t know if you=E2=80=99ve seen the diff cover on =
Peyote. I don=E2=80=99t remember where I got it, but it sure solved my =
diff overheating problems. If nothing else the sheer mass of aluminum =
helps, but it=E2=80=99s deeply finned. I=E2=80=99ve put temp sensing =
paint on it a few times and the outside of the cover never gets above =
170F. the cast steel banjo never gets above 180F. &nbsp;I doubt the oil =
gets much above 250=E2=80=94there=E2=80=99s none of toasty sulfur smell =
when I drain it.&nbsp;<div class=3D""><br class=3D""></div><div =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
Jun 2, 2015, at 2:19 PM, Keith Files &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><meta =
http-equiv=3D"content-type" content=3D"text/html; charset=3Dutf-8" =
class=3D""><div dir=3D"auto" class=3D""><div class=3D"">We use a diff =
cooler to avoid the problem on the TR6, a lot cheaper than continual =
rebuilds of the diff. I ran with one doing 3 hours of the Nurburgring =
Nordschleife a couple of years ago, it worked perfectly.</div><div =
class=3D""><br class=3D""></div><div class=3D"">Keith<br class=3D""><br =
class=3D"">Sent from my iPad</div><div class=3D""><br class=3D"">On 2 =
Jun 2015, at 20:01, Kas Kastner &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt; wrote:<br class=3D""><br =
class=3D""></div><blockquote type=3D"cite" class=3D""><div class=3D""><div=
 dir=3D"ltr" class=3D"">I had failure of all three cars at Sebring with =
the IRS cars. In practices the diffs overheated and puked oil out the =
breather tub as you describe. I laid part of it to a new diff but most =
to the heat generated by a disc type limited slip. The capacity of the =
diff is marginal for endurance running.&nbsp;Add to =
the&nbsp;&nbsp;capacity or add a cooler.&nbsp;</div><div =
class=3D"gmail_extra"><br clear=3D"all" class=3D""><div class=3D""><div =
class=3D"gmail_signature"><p class=3D""><strong class=3D""><font =
color=3D"#000099" class=3D"">Never be beaten by =
equipment.</font></strong></p></div></div>
<br class=3D""><div class=3D"gmail_quote">On Tue, Jun 2, 2015 at 10:40 =
AM, Greg And Alison Blake <span dir=3D"ltr" class=3D"">&lt;<a =
href=3D"mailto:[email-masked]" target=3D"_blank" =
class=3D"">[email-masked]</a>&gt;</span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex">Some of yall may have =
followed the social Media posts provided by our teammates through the =
weekend. We were racing the Beanitos TR6 this past weekend at what was =
to be TWS's last ever race. It was a split 16 hour endurance race =
(Sat&amp;Sun).<br class=3D"">
<br class=3D"">
We had a strange failure on Saturday. About 6 hours in, the truck was =
full of gear oil. I had routed a diff vent line to the trunk. Upon =
returning to the garage, we discovered melted poly diff mounts. Pic =
below.<br class=3D"">
<br class=3D"">
I've been scratching my head on this one. Prior to boiling the diff =
fluid, we had zero leaks in the freshly serviced diff. I had replaced =
all seals and filled with STALUBE 90WT GL4.<br class=3D"">
<br class=3D"">
I've been racing my TR3 using this same diff fluid for 6 years (replaced =
every two weekends). Never a problem with my vintage race car. Of =
course, I've never run the 3 for 6 hours straight.<br class=3D"">
<br class=3D"">
Some of the more seasoned endurance racers asked what fluid I had in the =
diff. All suggested that mineral based fluid is not a good choice for =
endurance events.<br class=3D"">
<br class=3D"">
I'd love to hear opinions as to the route cause of our failure and more =
importantly, suggested remedies.<br class=3D"">
<br class=3D"">
As to the results, the car was running consistently 2:1x laps with a =
fast lap of 2:10. We ended up taking the workers choice award. Had we =
run w/o diff failure and a subsequent battery failure, we could have =
been in the hunt for a podium finish. Fastest lap in our group was =
2:09.9<br class=3D"">
<br class=3D"">
Great weekend<br class=3D"">
<br class=3D"">
<br class=3D""><br class=3D"">
<br class=3D"">
Thanks<br class=3D"">
Greg<br class=3D"">_______________________________________________<br =
class=3D"">
<a href=3D"mailto:[email-masked]" class=3D"">[email-masked]</a><br=
 class=3D"">
<br class=3D"">
<a href=3D"http://www.fot-racing.com/" target=3D"_blank" =
class=3D"">http://www.fot-racing.com</a><br class=3D"">
<br class=3D"">
class=3D"">http://www.team.net/donate.html</a><br class=3D"">
Archive: <a href=3D"http://www.team.net/archive" target=3D"_blank" =
class=3D"">http://www.team.net/archive</a><br class=3D"">
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---

From: Tony Drews <[email-masked]>
Date: Tue, 02 Jun 2015 22:42:54 -0500

I'm not running an IRS, and my diff is Ford 8", but I ran into an 
interesting thing with the vent line.  I'd puke a bunch of gear lube 
out of the vent.  I put it in a catch can and would put a bunch of 
gear lube into the catch can.  I ended up plumbing the vent into the 
BOTTOM of the catch can so that the oil would run back into the diff 
between sessions.  Totally solved that particular problem.

If you puke out the oil, it can't lubricate the diff.

I'm running a detroit locker, plate type LSD's generate much more heat.

Cheers, Tony

At 12:40 PM 6/2/2015, Greg And Alison Blake wrote:
>Some of yall may have followed the social Media posts provided by 
>our teammates through the weekend. We were racing the Beanitos TR6 
>this past weekend at what was to be TWS's last ever race. It was a 
>split 16 hour endurance race (Sat&Sun).
>
>We had a strange failure on Saturday. About 6 hours in, the truck 
>was full of gear oil. I had routed a diff vent line to the trunk. 
>Upon returning to the garage, we discovered melted poly diff mounts. 
>Pic below.
>
>I've been scratching my head on this one. Prior to boiling the diff 
>fluid, we had zero leaks in the freshly serviced diff. I had 
>replaced all seals and filled with STALUBE 90WT GL4.
>
>I've been racing my TR3 using this same diff fluid for 6 years 
>(replaced every two weekends). Never a problem with my vintage race 
>car. Of course, I've never run the 3 for 6 hours straight.
>
>Some of the more seasoned endurance racers asked what fluid I had in 
>the diff. All suggested that mineral based fluid is not a good 
>choice for endurance events.
>
>I'd love to hear opinions as to the route cause of our failure and 
>As to the results, the car was running consistently 2:1x laps with a 
>fast lap of 2:10. We ended up taking the workers choice award. Had 
>we run w/o diff failure and a subsequent battery failure, we could 
>have been in the hunt for a podium finish. Fastest lap in our group was 2:09.9
>
>Great weekend
>
>
>
>
>
>Thanks
>Greg
>http://autox.team.net/mailman/options/fot/[email-masked]

---

From: "MadMarx" <[email-masked]>
Date: Wed, 3 Jun 2015 09:08:08 +0200

The TR8 uses also a Ford axle.
The vent hose is attached to the left axle tube so on right hand corners the
oil climbs into the vent tube.
The trick is to put the catch tank on the right side of the car.
No problems with it.

LSD is a Yukon Posi.

Cheers
Chris

-----Ursprüngliche Nachricht-----
Von: Fot [mailto:[email-masked]] Im Auftrag von Tony Drews
Gesendet: Mittwoch, 3. Juni 2015 05:43
An: Greg And Alison Blake; Amici Triumphi
Betreff: Re: [Fot] IRS diff overheating

I'm not running an IRS, and my diff is Ford 8", but I ran into an
interesting thing with the vent line.  I'd puke a bunch of gear lube out of
the vent.  I put it in a catch can and would put a bunch of gear lube into
the catch can.  I ended up plumbing the vent into the BOTTOM of the catch
can so that the oil would run back into the diff between sessions.  Totally
solved that particular problem.

Cheers, Tony

eam.net

---

From: "Marcel Van Mulders" <[email-masked]>
Date: Wed, 3 Jun 2015 09:32:55 +0200

This is a multi-part message in MIME format.

--===============2739846222165857200==
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------=_NextPart_000_003F_01D09DE0.4586C640
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

I got a diff cover with really big fins from Racetorations (Darryl
Uprichard) some 10 years ago and it's a big difference in cooling and =
oil
capacity. In 2011 I ran a new 1:4.33 crown and pinion, and this diff =
cover
was mounted, yet the diff oil got very hot and escaped through the axle
seals. Since then I use to check the T=B0 of the diff casing after races =
and
practices. I ran 4.1  /  3.9  /  4.33  / 4.55 ratio's since 2011 and
experienced so far that the crownwheel/pinions in the diff housing made =
up
for most of the T=B0 rising. With an original old Triumph 4.1
crownwheel/pinion the diff housing stayed really cool. Worst is my 4.33
ratio.
I suppose, the friction between pinion and crownwheel, and hence the =
heat
generated, can be very different depending on manufacturing, assembling =
of
the parts, running in of the diff..
Marcel

  _____ =20

Van: Fot [mailto:[email-masked]] Namens Bill Babcock
Verzonden: woensdag 3 juni 2015 0:32
Aan: Keith Files
CC: FOT
Onderwerp: Re: [Fot] IRS diff overheating

I don=92t know if you=92ve seen the diff cover on Peyote. I don=92t =
remember where
I got it, but it sure solved my diff overheating problems. If nothing =
else
the sheer mass of aluminum helps, but it=92s deeply finned. I=92ve put =
temp
sensing paint on it a few times and the outside of the cover never gets
above 170F. the cast steel banjo never gets above 180F.  I doubt the oil
gets much above 250=97there=92s none of toasty sulfur smell when I drain =
it. =20

We use a diff cooler to avoid the problem on the TR6, a lot cheaper than
continual rebuilds of the diff. I ran with one doing 3 hours of the
Nurburgring Nordschleife a couple of years ago, it worked perfectly.

Keith

Sent from my iPad

I had failure of all three cars at Sebring with the IRS cars. In =
practices
the diffs overheated and puked oil out the breather tub as you describe. =
I
laid part of it to a new diff but most to the heat generated by a disc =
type
limited slip. The capacity of the diff is marginal for endurance =
running.
Add to the  capacity or add a cooler.=20

On Tue, Jun 2, 2015 at 10:40 AM, Greg And Alison Blake
<[email-masked]> wrote:

We had a strange failure on Saturday. About 6 hours in, the truck was =
full
of gear oil. I had routed a diff vent line to the trunk. Upon returning =
to
the garage, we discovered melted poly diff mounts. Pic below.

I've been scratching my head on this one. Prior to boiling the diff =
fluid,
we had zero leaks in the freshly serviced diff. I had replaced all seals =
and
filled with STALUBE 90WT GL4.

course,

fast

Great weekend

Thanks
Greg

http://www.fot-racing.com <http://www.fot-racing.com/>=20

http://www.fot-racing.com <http://www.fot-racing.com/>=20

Archive: http://www.team.net/archive
http://autox.team.net/mailman/options/fot/[email-masked]

Bill Babcock
[email-masked]
Editor: Ponostyle
Celebrating Water

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<BODY=20
style=3D"WORD-WRAP: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space">
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D302131907-03062015>I got a diff cover with really big fins from=20
Racetorations (Darryl Uprichard) some 10 years ago and it's a big =
difference in=20
cooling and oil capacity. In 2011 I ran a new 1:4.33 crown and pinion, =
and this=20
diff cover was mounted, yet the diff oil got very hot and escaped =
through the=20
axle seals. Since then I use to check the T=B0 of the diff casing after =
races and=20
practices. I ran 4.1&nbsp; /&nbsp; 3.9&nbsp; /&nbsp; 4.33&nbsp; / 4.55 =
ratio's=20
since 2011 and experienced so far that the crownwheel/pinions in the =
diff=20
housing made up for most of the T=B0 rising. With an original old =
Triumph 4.1=20
crownwheel/pinion the diff housing stayed really cool. Worst is my 4.33=20
ratio.</SPAN></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D302131907-03062015>I suppose, the friction between pinion and =
crownwheel,=20
and hence the heat generated,&nbsp;can be very different depending on=20
manufacturing, assembling of the parts, running in of the=20
diff..</SPAN></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D302131907-03062015>Marcel</SPAN></FONT></DIV><BR>
<DIV lang=3Dnl class=3DOutlookMessageHeader dir=3Dltr align=3Dleft>
<HR tabIndex=3D-1>
<FONT size=3D2 face=3DTahoma><B>Van:</B> Fot =
[mailto:[email-masked]]=20
<B>Namens </B>Bill Babcock<BR><B>Verzonden:</B> woensdag 3 juni 2015=20
0:32<BR><B>Aan:</B> Keith Files<BR><B>CC:</B> FOT<BR><B>Onderwerp:</B> =
Re: [Fot]=20
IRS diff overheating<BR></FONT><BR></DIV>
<DIV></DIV>I don=92t know if you=92ve seen the diff cover on Peyote. I =
don=92t=20
remember where I got it, but it sure solved my diff overheating =
problems. If=20
nothing else the sheer mass of aluminum helps, but it=92s deeply finned. =
I=92ve put=20
temp sensing paint on it a few times and the outside of the cover never =
gets=20
above 170F. the cast steel banjo never gets above 180F. &nbsp;I doubt =
the oil=20
gets much above 250=97there=92s none of toasty sulfur smell when I drain =
it.&nbsp;
<DIV><BR></DIV>
<DIV>
<DIV>
<BLOCKQUOTE type=3D"cite">
  <DIV>On Jun 2, 2015, at 2:19 PM, Keith Files &lt;<A=20
  =
href=3D"mailto:[email-masked]">[email-masked]</A>&g=
t;=20
  wrote:</DIV><BR class=3DApple-interchange-newline>
  <DIV>
  <DIV>
  <DIV>We use a diff cooler to avoid the problem on the TR6, a lot =
cheaper than=20
  continual rebuilds of the diff. I ran with one doing 3 hours of the=20
  Nurburgring Nordschleife a couple of years ago, it worked =
perfectly.</DIV>
  <DIV><BR></DIV>
  <DIV>Keith<BR><BR>Sent from my iPad</DIV>
  <DIV><BR>On 2 Jun 2015, at 20:01, Kas Kastner &lt;<A=20
  href=3D"mailto:[email-masked]">[email-masked]</A>&gt;=20
  wrote:<BR><BR></DIV>
  <BLOCKQUOTE type=3D"cite">
    <DIV>
    <DIV dir=3Dltr>I had failure of all three cars at Sebring with the =
IRS cars.=20
    In practices the diffs overheated and puked oil out the breather tub =
as you=20
    describe. I laid part of it to a new diff but most to the heat =
generated by=20
    a disc type limited slip. The capacity of the diff is marginal for =
endurance=20
    running.&nbsp;Add to the&nbsp;&nbsp;capacity or add a =
cooler.&nbsp;</DIV>
    <DIV class=3Dgmail_extra><BR clear=3Dall>
    <DIV>
    <DIV class=3Dgmail_signature>
    <P><STRONG><FONT color=3D#000099>Never be beaten by=20
    equipment.</FONT></STRONG></P></DIV></DIV><BR>
    <DIV class=3Dgmail_quote>On Tue, Jun 2, 2015 at 10:40 AM, Greg And =
Alison=20
    Blake <SPAN dir=3Dltr>&lt;<A href=3D"mailto:[email-masked]"=20
    target=3D_blank>[email-masked]</A>&gt;</SPAN> wrote:<BR>
    <BLOCKQUOTE class=3Dgmail_quote=20
    style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: =
#ccc 1px solid">Some=20
      of yall may have followed the social Media posts provided by our =
teammates=20
      through the weekend. We were racing the Beanitos TR6 this past =
weekend at=20
      what was to be TWS's last ever race. It was a split 16 hour =
endurance race=20
      (Sat&amp;Sun).<BR><BR>We had a strange failure on Saturday. About =
6 hours=20
      in, the truck was full of gear oil. I had routed a diff vent line =
to the=20
      trunk. Upon returning to the garage, we discovered melted poly =
diff=20
      mounts. Pic below.<BR><BR>I've been scratching my head on this =
one. Prior=20
      to boiling the diff fluid, we had zero leaks in the freshly =
serviced diff.=20
      I had replaced all seals and filled with STALUBE 90WT =
GL4.<BR><BR>I've=20
      been racing my TR3 using this same diff fluid for 6 years =
(replaced every=20
      two weekends). Never a problem with my vintage race car. Of =
course, I've=20
      never run the 3 for 6 hours straight.<BR><BR>Some of the more =
seasoned=20
      endurance racers asked what fluid I had in the diff. All suggested =
that=20
      mineral based fluid is not a good choice for endurance =
events.<BR><BR>I'd=20
      love to hear opinions as to the route cause of our failure and =
more=20
      importantly, suggested remedies.<BR><BR>As to the results, the car =
was=20
      running consistently 2:1x laps with a fast lap of 2:10. We ended =
up taking=20
      the workers choice award. Had we run w/o diff failure and a =
subsequent=20
      battery failure, we could have been in the hunt for a podium =
finish.=20
      Fastest lap in our group was 2:09.9<BR><BR>Great=20
      =
weekend<BR><BR><BR><BR><BR>Thanks<BR>Greg<BR>____________________________=
___________________<BR><A=20
      =
href=3D"mailto:[email-masked]">[email-masked]</A><BR><BR><A=20
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From: Greg And Alison Blake <[email-masked]>
Date: Wed, 3 Jun 2015 08:30:24 -0500

Got some great feedback on this one. Such a great list. Just wish I knew before last weekend about this failure mode.  We could have turned another 200+ laps. 

One follow up. Is there a down side to overfilling an IRS diff unit?  I am thinking I'll install a metal catch can in the trunk and plumb to the bottom of the can. Would putting in another 1/2 quart into the diff aid in cooling or just  get puked out earlier?  If that's not an option, I'll investigate adding a bit of capacity to the cover along with a few fins. 

Thanks. 

> On Jun 2, 2015, at 12:40 PM, Greg And Alison Blake <[email-masked]> wrote:
> 
> Some of yall may have followed the social Media posts provided by our teammates through the weekend. We were racing the Beanitos TR6 this past weekend at what was to be TWS's last ever race. It was a split 16 hour endurance race (Sat&Sun). 
> 
> We had a strange failure on Saturday. About 6 hours in, the truck was full of gear oil. I had routed a diff vent line to the trunk. Upon returning to the garage, we discovered melted poly diff mounts. Pic below. 
> 
> I've been scratching my head on this one. Prior to boiling the diff fluid, we had zero leaks in the freshly serviced diff. I had replaced all seals and filled with STALUBE 90WT GL4. 
> 
> I've been racing my TR3 using this same diff fluid for 6 years (replaced every two weekends). Never a problem with my vintage race car. Of course, I've never run the 3 for 6 hours straight. 
> 
> Some of the more seasoned endurance racers asked what fluid I had in the diff. All suggested that mineral based fluid is not a good choice for endurance events. 
> 
> I'd love to hear opinions as to the route cause of our failure and more importantly, suggested remedies. 
> 
> As to the results, the car was running consistently 2:1x laps with a fast lap of 2:10. We ended up taking the workers choice award. Had we run w/o diff failure and a subsequent battery failure, we could have been in the hunt for a podium finish. Fastest lap in our group was 2:09.9
> 
> Great weekend
> 
> 
> 
> Thanks 
> Greg
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/[email-masked]
> 
>

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From: Chip Collingwood <[email-masked]>
Date: Wed, 3 Jun 2015 10:37:56 -0400

I would recommend the oil cooler route. We had a modified half shaft with mechanical pump and belt. It sometimes spit the belt. An electric setup would be the best choice given you run an alternator. I don't believe adding capacity will get you where you need to be

Sent from my iPhone

> On Jun 3, 2015, at 9:30 AM, Greg And Alison Blake <[email-masked]> wrote:
> 
> 
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/[email-masked]
> 
>

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From: Chip Collingwood <[email-masked]>
Date: Wed, 3 Jun 2015 10:41:53 -0400

Don't overfill the diff, it is designed to run in a shallow amount of fluid, not in a bath. Definitely use synthetic as it will run cooler

Sent from my iPhone

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From: Duncan Charlton <[email-masked]>
Date: Wed, 3 Jun 2015 09:47:20 -0500

Greg,

Adding oil above the usual mark would seem likely promote lubricant aeration, which works against the oil's ability to cushion the meshing gears. (By the way, I have read on the bobistheoilguy website that Lucas oil aerates badly, the downside of its ability to cling to and “climb” the gears, as seen in your FLAPS counter display).  If you decide not to run an oil cooler you might research Redline “Shock proof” gear oil.  I have friends running this product in Moss gearboxes (used by Morgan and Jaguar, among others) and they report significant reductions in operating temperature.

Duncan
(Texas)

> On Jun 3, 2015, at 8:30 AM, Greg And Alison Blake <[email-masked]> wrote:
> 
> 
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/[email-masked]
> 
> 

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