Subject: Re: [Fot] TR4 High speed driveline vibration

From: Jack Wheeler <[email-masked]>
Date: Mon, 15 Jun 2015 16:18:30 +0000 (UTC)

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I had a high speed vibration years ago with my TR-4A IRS.=C2=A0 It was caus=
ing my engine to miss.=C2=A0 At the suggestion of an engineer friend, i too=
k the driveshaft to a clutch and driveshaft company to have it balanced.=C2=
=A0 I'm not sure how closely the factory balanced them, or if someone using=
 the driveshaft prior to me had done something to get it out of balance.=C2=
=A0 Anyway, after having it balanced, the vibration, and the high speed mis=
s went away.=C2=A0 Problem solved.
Jack=20
      From: "[email-masked]" <[email-masked]>
 To: fot <[email-masked]>=20
 Sent: Monday, June 15, 2015 11:55 AM
 Subject: [Fot] TR4 High speed driveline vibration
  =20
FoT,
I have a driveline vibration that doesn't start up until I get to about 95-=
 100 MPH. I figured I would start with the driveshaftbefore looking into th=
e diff or OD/trans. I have an IRS car with Richard Good CV axles and hubs s=
o it's very un likely its that butI will inspect them. I'm wondering if any=
body has any advice on high speed vibration diagnosis or detection.What I'm=
 wondering is even if it is the driveshaft how would I know with it sitting=
 on my bench. Any help would, as always be greatly appreciated.Jim g
_______________________________________________
[email-masked]

http://www.fot-racing.com

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

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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 dir=3D"ltr" id=3D"yui_3_16_0_1_1434194137202_166779"><sp=
an id=3D"yui_3_16_0_1_1434194137202_166934">I had a high speed vibration ye=
ars ago with my TR-4A IRS.&nbsp; It was causing my engine to miss.&nbsp; At=
 the suggestion of an engineer friend, i took the driveshaft to a clutch an=
d driveshaft company to have it balanced.&nbsp; I'm not sure how closely th=
e factory balanced them, or if someone using the driveshaft prior to me had=
 done something to get it out of balance.&nbsp; Anyway, after having it bal=
anced, the vibration, and the high speed miss went away.&nbsp; Problem solv=
ed.</span></div><div id=3D"yui_3_16_0_1_1434194137202_166955" dir=3D"ltr"><=
span id=3D"yui_3_16_0_1_1434194137202_166934"><br></span></div><div id=3D"y=
ui_3_16_0_1_1434194137202_166973" dir=3D"ltr"><span id=3D"yui_3_16_0_1_1434=
194137202_166934">Jack </span></div><br>  <div id=3D"yui_3_16_0_1_143419413=
7202_166782" style=3D"font-family: HelveticaNeue, Helvetica Neue, Helvetica=
, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id=3D"yui_3_16_=
0_1_1434194137202_166781" style=3D"font-family: HelveticaNeue, Helvetica Ne=
ue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id=
=3D"yui_3_16_0_1_1434194137202_166780" dir=3D"ltr"> <hr id=3D"yui_3_16_0_1_=
1434194137202_166823" size=3D"1">  <font id=3D"yui_3_16_0_1_1434194137202_1=
66790" face=3D"Arial" size=3D"2"> <b><span style=3D"font-weight:bold;">From=
:</span></b> "[email-masked]" &lt;[email-masked]&gt;<br=
> <b><span style=3D"font-weight: bold;">To:</span></b> fot &lt;[email-masked]=
am.net&gt; <br> <b id=3D"yui_3_16_0_1_1434194137202_166933"><span id=3D"yui=
_3_16_0_1_1434194137202_166932" style=3D"font-weight: bold;">Sent:</span></=
b> Monday, June 15, 2015 11:55 AM<br> <b id=3D"yui_3_16_0_1_1434194137202_1=
66789"><span id=3D"yui_3_16_0_1_1434194137202_166788" style=3D"font-weight:=
 bold;">Subject:</span></b> [Fot] TR4 High speed driveline vibration<br> </=
font> </div> <div id=3D"yui_3_16_0_1_1434194137202_166783" class=3D"y_msg_c=
ontainer"><br><div id=3D"yiv0583838431"><div id=3D"yui_3_16_0_1_14341941372=
02_166786"><div id=3D"yui_3_16_0_1_1434194137202_166785" style=3D"font-fami=
ly:Arial;font-size:12pt;color:#000000;"><div id=3D"yui_3_16_0_1_14341941372=
02_166784">FoT,<br></div>
<div id=3D"yui_3_16_0_1_1434194137202_166787">I have a driveline vibration =
that doesn't start up until I get to about 95- 100 MPH. I figured I would s=
tart with the driveshaft</div>
<div id=3D"yui_3_16_0_1_1434194137202_166937">before looking into the diff =
or OD/trans. I have an IRS car with Richard Good CV axles and hubs so it's =
very un likely its that but</div>
<div id=3D"yui_3_16_0_1_1434194137202_166938">I will inspect them. I'm wond=
ering if anybody has any advice on high speed vibration diagnosis or detect=
ion.</div>
<div id=3D"yui_3_16_0_1_1434194137202_166824">What I'm wondering is even if=
 it is the driveshaft how would I know with it sitting on my bench. </div>
<div id=3D"yui_3_16_0_1_1434194137202_166974">Any help would, as always be =
greatly appreciated.</div>
<div id=3D"yui_3_16_0_1_1434194137202_166975">Jim g</div></div></div></div>=
<br>_______________________________________________<br><a ymailto=3D"mailto=
:[email-masked]" href=3D"mailto:[email-masked]">[email-masked]<=
/a><br><br><a href=3D"http://www.fot-racing.com/" target=3D"_blank">http://=
www.fot-racing.com</a><br><br>Donate: <a href=3D"http://www.team.net/donate=
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 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"_b=
lank">http://www.team.net/forums</a><br>Unsubscribe/Manage: <a href=3D"http=
://autox.team.net/mailman/options/fot/[email-masked]" target=3D"_bl=
ank">http://autox.team.net/mailman/options/fot/[email-masked]</a><b=
r><br><br><br><br></div> </div> </div>  </div></body></html>
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_______________________________________________
[email-masked]

http://www.fot-racing.com

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

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From: "Terry Stetler" <[email-masked]>
Date: Mon, 15 Jun 2015 12:35:41 -0400

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  =20
Very first thing to check are the U-Joints.   If they are worn the shaft =
will spin in an eccentric pattern and cause your vibration.   If the =
joints are OK take it to a good driveline shop and have it balanced, and =
replace the U-Joints anyway while the shaft is out of the car.

=20

Terry Stetler

----- Original Message -----=20

FoT,

I have a driveline vibration that doesn't start up until I get to about =
95- 100 MPH. I figured I would start with the driveshaft

before looking into the diff or OD/trans. I have an IRS car with Richard =
Good CV axles and hubs so it's very un likely its that but

I will inspect them. I'm wondering if anybody has any advice on high =
speed vibration diagnosis or detection.

What I'm wondering is even if it is the driveshaft how would I know with =
it sitting on my bench.=20

Any help would, as always be greatly appreciated.

Jim g

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

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<META http-equiv=3D"Content-Type" content=3D"text/html;charset=3Dutf-8"> =

<STYLE></STYLE>
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<META name=3D"GENERATOR" content=3D"MSHTML 11.00.9600.17842"></HEAD>=20
<BODY id=3D"MailContainerBody" topmargin=3D"0" leftmargin=3D"0" =
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area"><!--[gte IE 5]><?xml:namespace prefix=3D"v" /><?xml:namespace =
prefix=3D"o" /><![endif]-->
<DIV>
<DIV>Very first thing to check are the U-Joints.&nbsp;&nbsp; If they are =
worn=20
the shaft will spin in an eccentric pattern and cause your=20
vibration.&nbsp;&nbsp; If the joints are OK take it to a good driveline =
shop and=20
have it balanced, and replace the U-Joints anyway while the shaft is out =
of the=20
car.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Terry Stetler</DIV>
<BLOCKQUOTE style=3D"padding-right: 0px; padding-left: 5px; =
margin-right: 0px; margin-left: 5px; border-left-color: rgb(0, 0, 0); =
border-left-width: 2px; border-left-style: solid;">
  <DIV style=3D"font: 10pt/normal arial; font-size-adjust: none; =
font-stretch: normal;">-----=20
  Original Message ----- </DIV>
  <DIV style=3D"font: 10pt/normal arial; font-size-adjust: none; =
font-stretch: normal;"><B>From:</B>=20
  <A title=3D"mailto:[email-masked]" =
href=3D"mailto:[email-masked]">[email-masked]</A>=20
  </DIV>
  <DIV style=3D"font: 10pt/normal arial; font-size-adjust: none; =
font-stretch: normal;"><B>To:</B>=20
  <A title=3D"mailto:[email-masked]" =
href=3D"mailto:[email-masked]">fot</A>=20
  </DIV>
  <DIV style=3D"font: 10pt/normal arial; font-size-adjust: none; =
font-stretch: normal;"><B>Sent:</B>=20
  Monday, June 15, 2015 11:55 AM</DIV>
  <DIV style=3D"font: 10pt/normal arial; font-size-adjust: none; =
font-stretch: normal;"><B>Subject:</B>=20
  [Fot] TR4 High speed driveline vibration</DIV>
  <DIV><BR></DIV>
  <DIV style=3D"color: rgb(0, 0, 0); font-family: Arial; font-size: =
12pt;">
  <DIV>FoT,<BR aria-label=3D"Compose body"></DIV>
  <DIV>I have a driveline vibration that doesn't start up until I get to =
about=20
  95- 100 MPH. I figured I would start with the driveshaft</DIV>
  <DIV>before looking into the diff or OD/trans. I have an IRS car with =
Richard=20
  Good CV axles and hubs so it's very un likely its that but</DIV>
  <DIV>I will inspect them. I'm wondering if anybody has any advice on =
high=20
  speed vibration diagnosis or detection.</DIV>
  <DIV>What I'm wondering is even if it is the driveshaft how would I =
know with=20
  it sitting on my bench. </DIV>
  <DIV>Any help would, as always be greatly appreciated.</DIV>
  <DIV>Jim=20
  =
g</DIV></DIV>_______________________________________________<BR>fot@autox=
.team.net<BR><BR>http://www.fot-racing.com<BR><BR>Donate:=20
  http://www.team.net/donate.html<BR>Archive:=20
  http://www.team.net/archive<BR>Forums:=20
  http://www.team.net/forums<BR>Unsubscribe/Manage:=20
  =
http://autox.team.net/mailman/options/fot/[email-masked]<BR><BR><BR></B=
LOCKQUOTE></DIV></BODY></HTML>

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From: Duncan Charlton <[email-masked]>
Date: Mon, 15 Jun 2015 14:13:33 -0500

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Jim,

How are your motor and trans mounts?  If they allow the engine/gearbox =
combo to shift out of line when under high torque, the u-joints could =
move out of proper alignment, but then when power is reduced, things =
would shift back into position.  If you put the car on jackstands and =
run it to this rpm in top gear (might not be a bad idea to remove the =
drive wheels and tires if you=E2=80=99re sure they=E2=80=99re balanced) =
there won=E2=80=99t be much load on the engine, so if the vibration is =
due to deformation of the mounts, the vibration should not appear.

Duncan

> On Jun 15, 2015, at 10:55 AM, [email-masked] wrote:
>=20
> FoT,
> I have a driveline vibration that doesn't start up until I get to =
about 95- 100 MPH. I figured I would start with the driveshaft
> before looking into the diff or OD/trans. I have an IRS car with =
Richard Good CV axles and hubs so it's very un likely its that but
> What I'm wondering is even if it is the driveshaft how would I know =
with it sitting on my bench.
> Donate: http://www.team.net/donate.html
> Forums: http://www.team.net/forums
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/fot/[email-masked]

--Apple-Mail=_9783F483-9A7A-4D3A-892F-BE78B371B7B6
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	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"">Jim,<div class=3D""><br class=3D""></div><div class=3D"">How =
are your motor and trans mounts? &nbsp;If they allow the engine/gearbox =
combo to shift out of line when under high torque, the u-joints could =
move out of proper alignment, but then when power is reduced, things =
would shift back into position. &nbsp;If you put the car on jackstands =
and run it to this rpm in top gear (might not be a bad idea to remove =
the drive wheels and tires if you=E2=80=99re sure they=E2=80=99re =
balanced) there won=E2=80=99t be much load on the engine, so if the =
vibration is due to deformation of the mounts, the vibration should not =
appear.</div><div class=3D""><div class=3D""><div class=3D""><br =
class=3D""><div class=3D""><div class=3D"">Duncan</div><div class=3D""><br=
 class=3D""></div><div class=3D""><br class=3D""><div><blockquote =
type=3D"cite" class=3D""><div class=3D"">On Jun 15, 2015, at 10:55 AM, =
<a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a> wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div class=3D""><div =
style=3D"font-family: Arial; font-size: 12pt;" class=3D""><div =
class=3D"">FoT,<br aria-label=3D"Compose body" class=3D""></div>
<div class=3D"">I have a driveline vibration that doesn't start up until =
I get to about 95- 100 MPH. I figured I would start with the =
driveshaft</div>
<div class=3D"">before looking into the diff or OD/trans. I have an IRS =
car with Richard Good CV axles and hubs so it's very un likely its that =
but</div>
<div class=3D"">I will inspect them. I'm wondering if anybody has any =
advice on high speed vibration diagnosis or detection.</div>
<div class=3D"">What I'm wondering is even if it is the driveshaft how =
would I know with it sitting on my bench. </div>
<div class=3D"">Any help would, as always be greatly appreciated.</div>
<div class=3D"">Jim =
g</div></div></div>_______________________________________________<br =
class=3D""><a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a><br class=3D""><br =
class=3D"">http://www.fot-racing.com<br class=3D""><br class=3D"">Donate: =
http://www.team.net/forums<br class=3D"">Unsubscribe/Manage: =
http://autox.team.net/mailman/options/fot/[email-masked]<br =
class=3D""><br class=3D""><br class=3D""></div></blockquote></div><br =
class=3D""></div></div></div></div></div></body></html>=

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From: "MadMarx" <[email-masked]>
Date: Mon, 15 Jun 2015 21:32:11 +0200

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Had this on the last race.

Found all screws gone on the rear gearbox mount J

=20

=20

Von: Fot [mailto:[email-masked]] Im Auftrag von =
[email-masked]
Gesendet: Montag, 15. Juni 2015 17:56
An: fot
Betreff: [Fot] TR4 High speed driveline vibration

=20

FoT,

Jim g

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lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497=
D'>Had this on the last race.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497=
D'>Found all screws gone on the rear gearbox mount </span><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:Wingdings;color:#1F497D'>J</span><s=
pan lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497=
D'><o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Von:</span><=
/b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Fot [mailto:[email-masked]] <b>Im Auftrag von =
</b>[email-masked]<br><b>Gesendet:</b> Montag, 15. Juni 2015 =
17:56<br><b>An:</b> fot<br><b>Betreff:</b> [Fot] TR4 High speed =
driveline vibration<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif";color:black'>FoT,<o:p></o:p></s=
pan></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif";color:black'>I have a =
driveline vibration that doesn't start up until I get to about 95- 100 =
MPH. I figured I would start with the =
driveshaft<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif";color:black'>before looking =
into the diff or OD/trans. I have an IRS car with Richard Good CV axles =
and hubs so it's very un likely its that =
but<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif";color:black'>I will inspect =
them. I'm wondering if anybody has any advice on high speed vibration =
diagnosis or detection.<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif";color:black'>What I'm =
wondering is even if it is the driveshaft how would I know with it =
sitting on my bench. <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif";color:black'>Any help would, =
as always be greatly appreciated.<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-family:"Arial","sans-serif";color:black'>Jim =
g<o:p></o:p></span></p></div></div></div></body></html>
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From: [email-masked]
Date: Mon, 15 Jun 2015 19:32:36 +0000 (UTC)

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Thanks Duncan but I never get the vibration under high loads like coming of=
f a corner, it's only at top speed.=20
However the trans mount is worth looking in to. I'll have the driveshaft ou=
t to a shop by next Monday to check the balance and install new u-joints=20
just in case. I hope the problem is that or the trans mount.=C2=A0=20
=C2=A0=20
jim=20

----- Original Message -----

From: "Duncan Charlton" <[email-masked]>=20
To: [email-masked]=20
Cc: "fot" <[email-masked]>=20
Sent: Monday, June 15, 2015 1:13:33 PM=20
Subject: Re: [Fot] TR4 High speed driveline vibration=20

Jim,=20

How are your motor and trans mounts? =C2=A0If they allow the engine/gearbox=
 combo to shift out of line when under high torque, the u-joints could move=
 out of proper alignment, but then when power is reduced, things would shif=
t back into position. =C2=A0If you put the car on jackstands and run it to =
this rpm in top gear (might not be a bad idea to remove the drive wheels an=
d tires if you=E2=80=99re sure they=E2=80=99re balanced) there won=E2=80=99=
t be much load on the engine, so if the vibration is due to deformation of =
the mounts, the vibration should not appear.=20

Duncan=20

On Jun 15, 2015, at 10:55 AM, [email-masked] wrote:=20

FoT,=20
I have a driveline vibration that doesn't start up until I get to about 95-=
 100 MPH. I figured I would start with the driveshaft=20
before looking into the diff or OD/trans. I have an IRS car with Richard Go=
od CV axles and hubs so it's very un likely its that but=20
I will inspect them. I'm wondering if anybody has any advice on high speed =
vibration diagnosis or detection.=20
What I'm wondering is even if it is the driveshaft how would I know with it=
 sitting on my bench.=20
Any help would, as always be greatly appreciated.=20
Jim g=20
_______________________________________________=20
[email-masked]=20

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

Archive: http://www.team.net/archive=20
[email-masked]=20

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<html><body><div style=3D"font-family: Arial; font-size: 12pt; color: #0000=
00"><DIV>Thanks Duncan but I never get the vibration under high loads like =
coming off a corner, it's only at top speed.<BR></DIV>
<DIV>However the trans mount is worth looking in to. I'll have the drivesha=
ft out to a shop by next Monday to check the balance and install new u-join=
ts</DIV>
<DIV>just in case. I hope the problem is that or the trans mount.&nbsp;</DI=
V>
<DIV>&nbsp;</DIV>
<DIV>jim</DIV>
<DIV><BR></DIV>
<HR id=3Dzwchr>

<DIV style=3D"FONT-SIZE: 12pt; TEXT-DECORATION: none; FONT-FAMILY: Helvetic=
a,Arial,sans-serif; FONT-WEIGHT: normal; COLOR: #000; FONT-STYLE: normal"><=
B>From: </B>"Duncan Charlton" &lt;[email-masked]&gt;<BR><B>To:=
 </B>[email-masked]<BR><B>Cc: </B>"fot" &lt;[email-masked]&gt=
;<BR><B>Sent: </B>Monday, June 15, 2015 1:13:33 PM<BR><B>Subject: </B>Re: [=
Fot] TR4 High speed driveline vibration<BR>
<DIV><BR></DIV>Jim,
<DIV><BR></DIV>
<DIV>How are your motor and trans mounts? &nbsp;If they allow the engine/ge=
arbox combo to shift out of line when under high torque, the u-joints could=
 move out of proper alignment, but then when power is reduced, things would=
 shift back into position. &nbsp;If you put the car on jackstands and run i=
t to this rpm in top gear (might not be a bad idea to remove the drive whee=
ls and tires if you=E2=80=99re sure they=E2=80=99re balanced) there won=E2=
=80=99t be much load on the engine, so if the vibration is due to deformati=
on of the mounts, the vibration should not appear.</DIV>
<DIV>
<DIV>
<DIV><BR>
<DIV>
<DIV>Duncan</DIV>
<DIV><BR></DIV>
<DIV><BR>
<DIV>
<BLOCKQUOTE>
<DIV>On Jun 15, 2015, at 10:55 AM, <A href=3D"mailto:[email-masked]=
et" target=3D_blank>[email-masked]</A> wrote:</DIV><BR class=3DAp=
ple-interchange-newline>
<DIV>
<DIV>
<DIV style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">
<DIV>FoT,<BR></DIV>
<DIV>I have a driveline vibration that doesn't start up until I get to abou=
t 95- 100 MPH. I figured I would start with the driveshaft</DIV>
<DIV>before looking into the diff or OD/trans. I have an IRS car with Richa=
rd Good CV axles and hubs so it's very un likely its that but</DIV>
<DIV>I will inspect them. I'm wondering if anybody has any advice on high s=
peed vibration diagnosis or detection.</DIV>
<DIV>What I'm wondering is even if it is the driveshaft how would I know wi=
th it sitting on my bench. </DIV>
<DIV>Any help would, as always be greatly appreciated.</DIV>
<DIV>Jim g</DIV></DIV></DIV>_______________________________________________=
<BR><A href=3D"mailto:[email-masked]" target=3D_blank>[email-masked]=
t</A><BR><BR>http://www.fot-racing.com<BR><BR>Donate: http://www.team.net/d=
onate.html<BR>Archive: http://www.team.net/archive<BR>Forums: http://www.te=
am.net/forums<BR>Unsubscribe/Manage: http://autox.team.net/mailman/options/=
fot/[email-masked]<BR><BR><BR></DIV></BLOCKQUOTE></DIV><BR></D=
IV></DIV></DIV></DIV></DIV></DIV>
<DIV><BR></DIV></div></body></html>
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From: Duncan Charlton <[email-masked]>
Date: Mon, 15 Jun 2015 17:13:44 -0500

--===============8259847341872314172==

--Apple-Mail=_3EDA905C-6DE0-4888-8144-70CA69D41E44
Content-Transfer-Encoding: quoted-printable
	charset=utf-8

Hi Jim,

I don=E2=80=99t mean high loads as in high side loads generated by =
cornering, which, as you imply, could cock the motor and gearbox a bit =
to one side.   What I mean is that in top gear, as you approach the =
point where the amount of drag equals the amount of power available, the =
driveline is absorbing maximum power and the mounts mounts are providing =
maximum resistance to the engine=E2=80=99s torque reaction.  The =
motor/gearbox might cock a bit even in a straight line, I think.

Duncan

> On Jun 15, 2015, at 2:32 PM, [email-masked] wrote:
>=20
> Thanks Duncan but I never get the vibration under high loads like =
coming off a corner, it's only at top speed.
> However the trans mount is worth looking in to. I'll have the =
driveshaft out to a shop by next Monday to check the balance and install =
new u-joints
> just in case. I hope the problem is that or the trans mount.=20
> =20
> jim
>=20
> From: "Duncan Charlton" <[email-masked]>
> To: [email-masked]
> Cc: "fot" <[email-masked]>
> Sent: Monday, June 15, 2015 1:13:33 PM
>=20
> Duncan
>=20
>=20
> On Jun 15, 2015, at 10:55 AM, [email-masked] =
>=20
> FoT,

--Apple-Mail=_3EDA905C-6DE0-4888-8144-70CA69D41E44
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	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"">Hi Jim,<div class=3D""><br class=3D""><div class=3D"">I =
don=E2=80=99t mean high loads as in high side loads generated by =
cornering, which, as you imply, could cock the motor and gearbox a bit =
to one side. &nbsp; What I mean is that in top gear, as you approach the =
point where the amount of drag equals the amount of power available, the =
driveline is absorbing maximum power and the mounts mounts are providing =
maximum resistance to the engine=E2=80=99s torque reaction. &nbsp;The =
motor/gearbox might cock a bit even in a straight line, I =
think.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Duncan</div><div class=3D""><br =
class=3D""></div><div><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Jun 15, 2015, at 2:32 PM, <a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a> wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div class=3D""><div =
style=3D"font-family: Arial; font-size: 12pt;" class=3D""><div =
class=3D"">Thanks Duncan but I never get the vibration under high loads =
like coming off a corner, it's only at top speed.<br class=3D""></div>
<div class=3D"">However the trans mount is worth looking in to. I'll =
have the driveshaft out to a shop by next Monday to check the balance =
and install new u-joints</div>
<div class=3D"">just in case. I hope the problem is that or the trans =
mount.&nbsp;</div>
<div class=3D"">&nbsp;</div>
<div class=3D"">jim</div>
<div class=3D""><br class=3D""></div>
<hr id=3D"zwchr" class=3D"">

<div style=3D"font-size: 12pt; text-decoration: none; font-family: =
Helvetica, Arial, sans-serif; font-weight: normal; font-style: normal;" =
class=3D""><b class=3D"">From: </b>"Duncan Charlton" &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;<br class=3D""><b =
class=3D"">To: </b><a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a><br class=3D""><b class=3D"">Cc: =
</b>"fot" &lt;[email-masked]&gt;<br class=3D""><b class=3D"">Sent: =
</b>Monday, June 15, 2015 1:13:33 PM<br class=3D""><b class=3D"">Subject: =
</b>Re: [Fot] TR4 High speed driveline vibration<br class=3D"">
<div class=3D""><br class=3D""></div>Jim,
<div class=3D""><br class=3D""></div>
<div class=3D"">How are your motor and trans mounts? &nbsp;If they allow =
the engine/gearbox combo to shift out of line when under high torque, =
the u-joints could move out of proper alignment, but then when power is =
reduced, things would shift back into position. &nbsp;If you put the car =
on jackstands and run it to this rpm in top gear (might not be a bad =
idea to remove the drive wheels and tires if you=E2=80=99re sure =
they=E2=80=99re balanced) there won=E2=80=99t be much load on the =
engine, so if the vibration is due to deformation of the mounts, the =
vibration should not appear.</div>
<div class=3D"">
<div class=3D"">
<div class=3D""><br class=3D"">
<div class=3D"">
<div class=3D"">Duncan</div>
<div class=3D""><br class=3D""></div>
<div class=3D""><br class=3D"">
<div class=3D"">
<blockquote class=3D"">
<div class=3D"">On Jun 15, 2015, at 10:55 AM, <a =
href=3D"mailto:[email-masked]" target=3D"_blank" =
class=3D"">[email-masked]</a> wrote:</div><br =
class=3D"Apple-interchange-newline">
<div class=3D"">
<div class=3D"">
<div style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial" class=3D"">
<div class=3D"">FoT,<br class=3D""></div>
<div class=3D"">I have a driveline vibration that doesn't start up until =
I get to about 95- 100 MPH. I figured I would start with the =
driveshaft</div>
<div class=3D"">before looking into the diff or OD/trans. I have an IRS =
car with Richard Good CV axles and hubs so it's very un likely its that =
but</div>
<div class=3D"">I will inspect them. I'm wondering if anybody has any =
advice on high speed vibration diagnosis or detection.</div>
<div class=3D"">What I'm wondering is even if it is the driveshaft how =
would I know with it sitting on my bench. </div>
<div class=3D"">Any help would, as always be greatly appreciated.</div>
<div class=3D"">Jim =
g</div></div></div>_______________________________________________<br =
class=3D""><a href=3D"mailto:[email-masked]" target=3D"_blank" =
class=3D"">[email-masked]</a><br class=3D""><br =
class=3D"">http://www.fot-racing.com<br class=3D""><br class=3D"">Donate: =
http://www.team.net/forums<br class=3D"">Unsubscribe/Manage: =
http://autox.team.net/mailman/options/fot/[email-masked]<br =
class=3D""><br class=3D""><br class=3D""></div></blockquote></div><br =
class=3D""></div></div></div></div></div></div>
<div class=3D""><br =
class=3D""></div></div></div></div></blockquote></div><br =
class=3D""></div></body></html>=

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From: [email-masked]
Date: Mon, 15 Jun 2015 22:20:27 +0000 (UTC)

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OK,=20
I got it. The engine mounts are good but I may have a little movement in th=
e trans mount.=20
I'm glad you brought it up and I'll check it.=20
jim=20

----- Original Message -----

Sent: Monday, June 15, 2015 4:13:44 PM=20

Hi Jim,=20

I don=E2=80=99t mean high loads as in high side loads generated by cornerin=
g, which, as you imply, could cock the motor and gearbox a bit to one side.=
 =C2=A0 What I mean is that in top gear, as you approach the point where th=
e amount of drag equals the amount of power available, the driveline is abs=
orbing maximum power and the mounts mounts are providing maximum resistance=
 to the engine=E2=80=99s torque reaction. =C2=A0The motor/gearbox might coc=
k a bit even in a straight line, I think.=20

Duncan=20

On Jun 15, 2015, at 2:32 PM, [email-masked] wrote:=20

----- Original Message -----

From: "Duncan Charlton" < [email-masked] >=20

Jim,=20

Duncan=20

<blockquote>

FoT,=20

</blockquote>

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<html><body><div style=3D"font-family: Arial; font-size: 12pt; color: #0000=
00"><DIV>OK,<BR></DIV>
<DIV>I got it. The engine mounts are good but I may have a little movement =
in the trans mount.</DIV>
<DIV>I'm glad you brought it up and I'll check it.</DIV>
<DIV>jim</DIV>
<DIV><BR></DIV>
<HR id=3Dzwchr>

<DIV style=3D"FONT-SIZE: 12pt; TEXT-DECORATION: none; FONT-FAMILY: Helvetic=
a,Arial,sans-serif; FONT-WEIGHT: normal; COLOR: #000; FONT-STYLE: normal"><=
B>From: </B>"Duncan Charlton" &lt;[email-masked]&gt;<BR><B>To:=
 </B>[email-masked]<BR><B>Cc: </B>"fot" &lt;[email-masked]&gt=
;<BR><B>Sent: </B>Monday, June 15, 2015 4:13:44 PM<BR><B>Subject: </B>Re: [=
Fot] TR4 High speed driveline vibration<BR>
<DIV><BR></DIV>Hi Jim,
<DIV><BR>
<DIV>I don=E2=80=99t mean high loads as in high side loads generated by cor=
nering, which, as you imply, could cock the motor and gearbox a bit to one =
side. &nbsp; What I mean is that in top gear, as you approach the point whe=
re the amount of drag equals the amount of power available, the driveline i=
s absorbing maximum power and the mounts mounts are providing maximum resis=
tance to the engine=E2=80=99s torque reaction. &nbsp;The motor/gearbox migh=
t cock a bit even in a straight line, I think.</DIV>
<DIV><BR></DIV>
<DIV>Duncan</DIV>
<DIV><BR></DIV>
<DIV>
<BLOCKQUOTE>
<DIV>On Jun 15, 2015, at 2:32 PM, <A href=3D"mailto:[email-masked]=
t" target=3D_blank>[email-masked]</A> wrote:</DIV><BR class=3DApp=
le-interchange-newline>
<DIV>
<DIV>
<DIV style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">
<DIV>Thanks Duncan but I never get the vibration under high loads like comi=
ng off a corner, it's only at top speed.<BR></DIV>
<DIV>However the trans mount is worth looking in to. I'll have the drivesha=
ft out to a shop by next Monday to check the balance and install new u-join=
ts</DIV>
<DIV>just in case. I hope the problem is that or the trans mount.&nbsp;</DI=
V>
<DIV>&nbsp;</DIV>
<DIV>jim</DIV>
<DIV><BR></DIV>
<HR id=3Dzwchr>

<DIV style=3D"FONT-SIZE: 12pt; TEXT-DECORATION: none; FONT-FAMILY: Helvetic=
a, Arial, sans-serif; FONT-WEIGHT: normal; FONT-STYLE: normal"><B>From: </B=
>"Duncan Charlton" &lt;<A href=3D"mailto:[email-masked]" targe=
t=3D_blank>[email-masked]</A>&gt;<BR><B>To: </B><A href=3D"mai=
lto:[email-masked]" target=3D_blank>[email-masked]</A><=
BR><B>Cc: </B>"fot" &lt;[email-masked]&gt;<BR><B>Sent: </B>Monday, June=
 15, 2015 1:13:33 PM<BR><B>Subject: </B>Re: [Fot] TR4 High speed driveline =
vibration<BR>
<DIV><BR></DIV>Jim,=20
<DIV><BR></DIV>
<DIV><BR></DIV></DIV></DIV></DIV></BLOCKQUOTE></DIV><BR></DIV></DIV>
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From: Tony and Annie Garmey <[email-masked]>
Date: Mon, 15 Jun 2015 19:28:21 -0500

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There a great clip on you tube about driveline alignment , phasing and vibra=
tions.=20

Inland empire drive lines in LA are very very good .=20

> On Jun 15, 2015, at 2:38 PM, MadMarx <[email-masked]> wrote:
>=20
> Von: Fot [mailto:[email-masked]] Im Auftrag von toodamnfunky@c=
omcast.net
> I have a driveline vibration that doesn't start up until I get to about 95=
- 100 MPH. I figured I would start with the driveshaft
> before looking into the diff or OD/trans. I have an IRS car with Richard G=
ood CV axles and hubs so it's very un likely its that but
> I will inspect them. I'm wondering if anybody has any advice on high speed=
 vibration diagnosis or detection.
> What I'm wondering is even if it is the driveshaft how would I know with i=
t sitting on my bench.
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/horizonracin=
[email-masked]

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From: [email-masked]
Date: Mon, 15 Jun 2015 22:33:53 -0400

This is a multi-part message in MIME format.
--===============6322820761646588394==
 boundary="--------MB_8D275F404E545A3_808_154DA1_webmail-va005.sysops.aol.com"

This is a multi-part message in MIME format.
----------MB_8D275F404E545A3_808_154DA1_webmail-va005.sysops.aol.com
Content-Transfer-Encoding: quoted-printable

=20FOTer's,=0D=0AI=20will=20assume=20this=20car=20has=20the=20stock=20style=20tr=
ans=20mount,=20not=20the=20later=20TR6=20style=20setup...yeah=20I=20know=20about=
=20assuming=20anything,=20but=20here=20I=20go.=0D=0AIn=20order=20to=20keep=20the=
=20rear=20of=20the=20trans=20where=20it=20belongs=20and=20yet=20allow=20some=20m=
ovement=20and=20inslulation=20this=20is=20the=20mod=20I=20have=20utilized.=0D=0A=
Remove=20the=202=20trans=20to=20mount=20bolts=20and=20drill=20straight=20down=20=
thru=20those=20mounting=20holes=20thru=20the=20small=20trans=20crossmember.=20En=
large=20those=20new=20holes=20in=20that=20crossmember=20to=20about=205/8"=20or=20=
so.=20Purchase=202=20new=20bolts=20that=20are=20treaded=20all=20the=20way=20and=20=
are=20long=20enough=20to=20go=20thru=20the=20trans,=20the=20trans=20mount=20and=20=
the=20crossmember.=20Drop=20the=20bolt=20thru=20the=20trans=20and=20trans=20moun=
t=20and=20start=20a=20nut=20up=20the=20bolt=20to=20tighten=20the=20trans=20to=20=
the=20mount.=20The=20bolt=20will=20now=20extend=20thru=20the=20trans,=20the=20mo=
unt=20(tighten=20the=20nut=20securely=20to=20hold=20them=20together)=20and=20the=
=20crossmember.=20Use=20a=20large=20washer=20and=20a=20nyloc=20on=20the=20bolt=20=
where=20it=20now=20extends=20thru=20the=20crossmember.=20Tighten=20this=20nylock=
=20only=20until=20it=20"just"=20contacts=20the=20crossmember.=20Because=20the=20=
bolt=20is=20smaller=20than=20the=20hole=20you=20just=20drilled=20it=20will=20all=
ow=20the=20trans=20to=20move=20a=20small=20distance=20in=20any=20direction,=20bu=
t=20will=20stop=20any=20excessive=20movement,=20including=20saving=20the=20radia=
tor=20in=20event=20of=20a=20serious=20impact!=0D=0A=0D=0AClear=20as=20mud?=0D=0A=
=0D=0AA=20little=20out=20of=20balance=20in=20Nor=20Cal=0D=0ANick=0D=0A=0D=0A=20=0D=
=0A=0D=0A=0D=0A=0D=0A-----Original=20Message-----=0D=0AFrom:=20Duncan=20Charlton=
=20&lt;[email-masked]&gt;=0D=0ATo:=20toodamnfunky=20&lt;toodamnfunk=
[email-masked]&gt;=0D=0ACc:=20fot=20&lt;[email-masked]&gt;=0D=0ASent:=20Mon,=20=
Jun=2015,=202015=2012:23=20pm=0D=0ASubject:=20Re:=20[Fot]=20TR4=20High=20speed=20=
driveline=20vibration=0D=0A=0D=0A=20=20Jim,=0D=0AHow=20are=20your=20motor=20and=20=
trans=20mounts?=20=C2=A0If=20they=20allow=20the=20engine/gearbox=20combo=20to=20=
shift=20out=20of=20line=20when=20under=20high=20torque,=20the=20u-joints=20could=
=20move=20out=20of=20proper=20alignment,=20but=20then=20when=20power=20is=20redu=
ced,=20things=20would=20shift=20back=20into=20position.=20=C2=A0If=20you=20put=20=
the=20car=20on=20jackstands=20and=20run=20it=20to=20this=20rpm=20in=20top=20gear=
=20(might=20not=20be=20a=20bad=20idea=20to=20remove=20the=20drive=20wheels=20and=
=20tires=20if=20you=E2=80=99re=20sure=20they=E2=80=99re=20balanced)=20there=20wo=
n=E2=80=99t=20be=20much=20load=20on=20the=20engine,=20so=20if=20the=20vibration=20=
is=20due=20to=20deformation=20of=20the=20mounts,=20the=20vibration=20should=20no=
t=20appear.=0D=0ADuncan=0D=0A=0D=0AOn=20Jun=2015,=202015,=20at=2010:55=20AM,=20t=
[email-masked]=20wrote:=0D=0AFoT,=0D=0A=20I=20have=20a=20driveline=20vi=
bration=20that=20doesn't=20start=20up=20until=20I=20get=20to=20about=2095-=20100=
=20MPH.=20I=20figured=20I=20would=20start=20with=20the=20driveshaft=0D=0A=20befo=
re=20looking=20into=20the=20diff=20or=20OD/trans.=20I=20have=20an=20IRS=20car=20=
with=20Richard=20Good=20CV=20axles=20and=20hubs=20so=20it's=20very=20un=20likely=
=20its=20that=20but=0D=0A=20I=20will=20inspect=20them.=20I'm=20wondering=20if=20=
anybody=20has=20any=20advice=20on=20high=20speed=20vibration=20diagnosis=20or=20=
detection.=0D=0A=20What=20I'm=20wondering=20is=20even=20if=20it=20is=20the=20dri=
veshaft=20how=20would=20I=20know=20with=20it=20sitting=20on=20my=20bench.=20=0D=0A=
=20Any=20help=20would,=20as=20always=20be=20greatly=20appreciated.=0D=0A=20Jim=20=
g=0D=0A=0D=0A=0D=0A_______________________________________________=0D=0A=0D=0A=0D=
=0A=0D=0A=0D=0A=0D=0A=0D=0A=0D=0A=20=0D=0A=20=20=20=20__________________________=
_____________________=[email-masked]=20=20http://www.fot-racing.com=20=20D=
onate:=20http://www.team.net/donate.html=20Archive:=20http://www.team.net/archiv=
e=20Forums:=20http://www.team.net/forums=20Unsubscribe/Manage:=20http://autox.te=
am.net/mailman/options/fot/[email-masked]=20=20=20=20=0D=0A=20=20=0A=0A
----------MB_8D275F404E545A3_808_154DA1_webmail-va005.sysops.aol.com
Content-Transfer-Encoding: quoted-printable

=0D=0A<div=20style=3D"font-family:Comic=20Sans=20MS,=20sans-serif;color:black;fo=
nt-size:14pt;">=20FOTer's,<br>=0D=0AI=20will=20assume=20this=20car=20has=20the=20=
stock=20style=20trans=20mount,=20not=20the=20later=20TR6=20style=20setup...yeah=20=
I=20know=20about=20assuming=20anything,=20but=20here=20I=20go.<br>=0D=0AIn=20ord=
er=20to=20keep=20the=20rear=20of=20the=20trans=20where=20it=20belongs=20and=20ye=
t=20allow=20some=20movement=20and=20inslulation=20this=20is=20the=20mod=20I=20ha=
ve=20utilized.<br>=0D=0ARemove=20the=202=20trans=20to=20mount=20bolts=20and=20dr=
ill=20straight=20down=20thru=20those=20mounting=20holes=20thru=20the=20small=20t=
rans=20crossmember.=20Enlarge=20those=20new=20holes=20in=20that=20crossmember=20=
to=20about=205/8"=20or=20so.=20Purchase=202=20new=20bolts=20that=20are=20treaded=
=20all=20the=20way=20and=20are=20long=20enough=20to=20go=20thru=20the=20trans,=20=
the=20trans=20mount=20and=20the=20crossmember.=20Drop=20the=20bolt=20thru=20the=20=
trans=20and=20trans=20mount=20and=20start=20a=20nut=20up=20the=20bolt=20to=20tig=
hten=20the=20trans=20to=20the=20mount.=20The=20bolt=20will=20now=20extend=20thru=
=20the=20trans,=20the=20mount=20(tighten=20the=20nut=20securely=20to=20hold=20th=
em=20together)=20and=20the=20crossmember.=20Use=20a=20large=20washer=20and=20a=20=
nyloc=20on=20the=20bolt=20where=20it=20now=20extends=20thru=20the=20crossmember.=
=20Tighten=20this=20nylock=20only=20until=20it=20"just"=20contacts=20the=20cross=
member.=20Because=20the=20bolt=20is=20smaller=20than=20the=20hole=20you=20just=20=
drilled=20it=20will=20allow=20the=20trans=20to=20move=20a=20small=20distance=20i=
n=20any=20direction,=20but=20will=20stop=20any=20excessive=20movement,=20includi=
ng=20saving=20the=20radiator=20in=20event=20of=20a=20serious=20impact!<br>=0D=0A=
<br>=0D=0AClear=20as=20mud?<br>=0D=0A<br>=0D=0AA=20little=20out=20of=20balance=20=
in=20Nor=20Cal<br>=0D=0ANick<br>=0D=0A</div>=0D=0A=0D=0A<div>=20<br>=0D=0A</div>=
=0D=0A=0D=0A<div><br>=0D=0A</div>=0D=0A-----Original=20Message-----<br>=0D=0AFro=
m:=20Duncan=20Charlton=20&lt;[email-masked]&gt;<br>=0D=0ATo:=20tood=
amnfunky=20&lt;[email-masked]&gt;<br>=0D=0ACc:=20fot=20&lt;[email-masked]=
eam.net&gt;<br>=0D=0ASent:=20Mon,=20Jun=2015,=202015=2012:23=20pm<br>=0D=0ASubje=
ct:=20Re:=20[Fot]=20TR4=20High=20speed=20driveline=20vibration<br>=0D=0A<br>=0D=0A=
=20=0D=0A<div=20id=3D"AOLMsgPart_2_45cce30f-f9f0-4a0d-b0fd-8426ec08d75f">=20=0D=0A=
<div=20style=3D"word-wrap:=20break-word;=20-webkit-nbsp-mode:=20space;=20-webkit=
-line-break:=20after-white-space;"=20class=3D"=20aolReplacedBody">Jim,=0D=0A<div=
=20class=3D"aolmail_"><br=20class=3D"aolmail_"></div>=0D=0A=0D=0A<div=20class=3D=
"aolmail_">How=20are=20your=20motor=20and=20trans=20mounts?=20&nbsp;If=20they=20=
allow=20the=20engine/gearbox=20combo=20to=20shift=20out=20of=20line=20when=20und=
er=20high=20torque,=20the=20u-joints=20could=20move=20out=20of=20proper=20alignm=
ent,=20but=20then=20when=20power=20is=20reduced,=20things=20would=20shift=20back=
=20into=20position.=20&nbsp;If=20you=20put=20the=20car=20on=20jackstands=20and=20=
run=20it=20to=20this=20rpm=20in=20top=20gear=20(might=20not=20be=20a=20bad=20ide=
a=20to=20remove=20the=20drive=20wheels=20and=20tires=20if=20you=E2=80=99re=20sur=
e=20they=E2=80=99re=20balanced)=20there=20won=E2=80=99t=20be=20much=20load=20on=20=
the=20engine,=20so=20if=20the=20vibration=20is=20due=20to=20deformation=20of=20t=
he=20mounts,=20the=20vibration=20should=20not=20appear.</div>=0D=0A=0D=0A<div=20=
class=3D"aolmail_">=0D=0A<div=20class=3D"aolmail_">=0D=0A<div=20class=3D"aolmail=
_"><br=20class=3D"aolmail_">=0D=0A<div=20class=3D"aolmail_">=0D=0A<div=20class=3D=
"aolmail_">Duncan</div>=0D=0A=0D=0A<div=20class=3D"aolmail_"><br=20class=3D"aolm=
ail_"></div>=0D=0A=0D=0A<div=20class=3D"aolmail_"><br=20class=3D"aolmail_">=0D=0A=
<div><blockquote=20type=3D"cite"=20class=3D"aolmail_">=0D=0A<div=20class=3D"aolm=
ail_">On=20Jun=2015,=202015,=20at=2010:55=20AM,=20<a=20href=3D"mailto:toodamnfun=
[email-masked]"=20class=3D"aolmail_">[email-masked]</a>=20wrote:</div>=
=0D=0A<br=20class=3D"aolmail_Apple-interchange-newline">=0D=0A<div=20class=3D"ao=
lmail_">=0D=0A<div=20class=3D"aolmail_">=0D=0A<div=20style=3D"font-family:=20Ari=
al;=20font-size:=2012pt;"=20class=3D"aolmail_">=0D=0A<div=20class=3D"aolmail_">F=
oT,<br=20class=3D"aolmail_"></div>=0D=0A=20=0D=0A<div=20class=3D"aolmail_">I=20h=
ave=20a=20driveline=20vibration=20that=20doesn't=20start=20up=20until=20I=20get=20=
to=20about=2095-=20100=20MPH.=20I=20figured=20I=20would=20start=20with=20the=20d=
riveshaft</div>=0D=0A=20=0D=0A<div=20class=3D"aolmail_">before=20looking=20into=20=
the=20diff=20or=20OD/trans.=20I=20have=20an=20IRS=20car=20with=20Richard=20Good=20=
CV=20axles=20and=20hubs=20so=20it's=20very=20un=20likely=20its=20that=20but</div=
>=0D=0A=20=0D=0A<div=20class=3D"aolmail_">I=20will=20inspect=20them.=20I'm=20won=
dering=20if=20anybody=20has=20any=20advice=20on=20high=20speed=20vibration=20dia=
gnosis=20or=20detection.</div>=0D=0A=20=0D=0A<div=20class=3D"aolmail_">What=20I'=
m=20wondering=20is=20even=20if=20it=20is=20the=20driveshaft=20how=20would=20I=20=
know=20with=20it=20sitting=20on=20my=20bench.=20</div>=0D=0A=20=0D=0A<div=20clas=
s=3D"aolmail_">Any=20help=20would,=20as=20always=20be=20greatly=20appreciated.</=
div>=0D=0A=20=0D=0A<div=20class=3D"aolmail_">Jim=20g</div>=0D=0A</div>=0D=0A</di=
v>=0D=0A_______________________________________________<br=20class=3D"aolmail_">=
<br=20class=3D"aolmail_"><br=20class=3D"aolmail_"><br=20class=3D"aolmail_"><br=20=
class=3D"aolmail_"></div>=0D=0A</blockquote></div>=0D=0A<br=20class=3D"aolmail_"=
></div>=0D=0A</div>=0D=0A</div>=0D=0A</div>=0D=0A</div>=0D=0A</div>=0D=0A=20</di=
v>=0D=0A=20=20=0D=0A<div=20id=3D"AOLMsgPart_3_45cce30f-f9f0-4a0d-b0fd-8426ec08d7=
5f"=20style=3D"margin:=200px;font-family:=20Tahoma,=20Verdana,=20Arial,=20Sans-S=
erif;font-size:=2012px;color:=20#000;background-color:=20#fff;">=20=20<pre=20sty=
le=3D"font-size:=209pt;"><tt>_______________________________________________=20<=
a=20href=3D"mailto:[email-masked]">[email-masked]</a>=20=20<a=20target=3D=
"_blank"=20href=3D"http://www.fot-racing.com">http://www.fot-racing.com</a>=20=20=
Donate:=20<a=20target=3D"_blank"=20href=3D"http://www.team.net/donate.html">http=
://www.team.net/donate.html</a>=20Archive:=20<a=20target=3D"_blank"=20href=3D"ht=
tp://www.team.net/archive">http://www.team.net/archive</a>=20Forums:=20<a=20targ=
et=3D"_blank"=20href=3D"http://www.team.net/forums">http://www.team.net/forums</=
a>=20Unsubscribe/Manage:=20<a=20target=3D"_blank"=20href=3D"http://autox.team.ne=
t/mailman/options/fot/[email-masked]">http://autox.team.net/mailman/options/fo=
t/[email-masked]</a>=20=20=20</tt></pre>=20</div>=0D=0A=20=20=0D=0A
----------MB_8D275F404E545A3_808_154DA1_webmail-va005.sysops.aol.com--

--===============6322820761646588394==
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--===============6322820761646588394==--

---

From: [email-masked]
Date: Tue, 16 Jun 2015 08:01:42 +0000

In my case, the bolts at the transmission / driveshaft flange had  
started to come loose.  Only felt it in top gear at high rpm.  Really  
obvious when I started to dig into it.

Tony Drews

Quoting [email-masked]:

> FoT,
> I have a driveline vibration that doesn't start up until I get to  
> before looking into the diff or OD/trans. I have an IRS car with  
> I will inspect them. I'm wondering if anybody has any advice on high  
> What I'm wondering is even if it is the driveshaft how would I know

---

From: Dean Tetterton <[email-masked]>
Date: Tue, 16 Jun 2015 04:20:28 -0400

Tony
I use Stover Lock nuts on the 3/8-24 drive shaft bolts instead of the nyloc nuts. Hold much better.

Dean T.

On Jun 16, 2015, at 4:01 AM, [email-masked] wrote:

> In my case, the bolts at the transmission / driveshaft flange had started to come loose.  Only felt it in top gear at high rpm.  Really obvious when I started to dig into it.
> 
> Tony Drews
>

---

From: "Bill Tobin" <[email-masked]>
Date: Tue, 16 Jun 2015 08:10:02 -0400

--===============5946440633800617227==
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Clear as mud. That's basically what I did on my car when I put the =
Celica trans in.
Works fine.
Someone mentioned the exhaust system interference. Last year I did some =
work on the car and when I put the exhaust pipes back on, one was very =
close to the rear trans mount and gave a hellish hi-freq vibration. Ten =
minute fix and an oops!
Bill
  ----- Original Message -----=20
  From: [email-masked]=20
  To: [email-masked]=20
  Cc: [email-masked]=20
  Sent: Monday, June 15, 2015 10:33 PM
  Subject: Re: [Fot] TR4 High speed driveline vibration

  FOTer's,
  I will assume this car has the stock style trans mount, not the later =
TR6 style setup...yeah I know about assuming anything, but here I go.
  In order to keep the rear of the trans where it belongs and yet allow =
some movement and inslulation this is the mod I have utilized.
  Remove the 2 trans to mount bolts and drill straight down thru those =
mounting holes thru the small trans crossmember. Enlarge those new holes =
in that crossmember to about 5/8" or so. Purchase 2 new bolts that are =
treaded all the way and are long enough to go thru the trans, the trans =
mount and the crossmember. Drop the bolt thru the trans and trans mount =
and start a nut up the bolt to tighten the trans to the mount. The bolt =
will now extend thru the trans, the mount (tighten the nut securely to =
hold them together) and the crossmember. Use a large washer and a nyloc =
on the bolt where it now extends thru the crossmember. Tighten this =
nylock only until it "just" contacts the crossmember. Because the bolt =
is smaller than the hole you just drilled it will allow the trans to =
move a small distance in any direction, but will stop any excessive =
movement, including saving the radiator in event of a serious impact!

  Clear as mud?

  A little out of balance in Nor Cal
  Nick

  -----Original Message-----
  From: Duncan Charlton <[email-masked]>
  To: toodamnfunky <[email-masked]>
  Cc: fot <[email-masked]>
  Sent: Mon, Jun 15, 2015 12:23 pm
  Subject: Re: [Fot] TR4 High speed driveline vibration

  Jim,=20

  Duncan

    FoT,

with it sitting on my bench.=20

_______________________________________________ [email-masked]  =
http://www.fot-racing.com  Donate: http://www.team.net/donate.html =
Archive: http://www.team.net/archive Forums: http://www.team.net/forums =
http://autox.team.net/mailman/options/fot/[email-masked]  =20

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  Archive: http://www.team.net/archive
  Forums: http://www.team.net/forums
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Content-Transfer-Encoding: quoted-printable

=EF=BB=BF<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content=3D"text/html; charset=3Dutf-8" http-equiv=3DContent-Type>
<META name=3DGENERATOR content=3D"MSHTML 8.00.6001.23588">
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2 face=3DArial>Clear as mud. That's basically what I =
did on my car=20
when I put the Celica trans in.</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Works fine.</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Someone mentioned the exhaust system =
interference.=20
Last year I did some work on the car and when I put the exhaust pipes =
back on,=20
one was very close to the rear trans mount and gave a hellish hi-freq =
vibration.=20
Ten minute fix and an oops!</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Bill</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: =
black"><B>From:</B>=20
  <A title=[email-masked] =
href=3D"mailto:[email-masked]">[email-masked]</A>=20
  </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=[email-masked]=20
  href=3D"mailto:[email-masked]">[email-masked]</A> =
</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Cc:</B> <A =
title=[email-masked]=20
  href=3D"mailto:[email-masked]">[email-masked]</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, June 15, 2015 =
10:33=20
PM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: [Fot] TR4 High =
speed=20
  driveline vibration</DIV>
  <DIV><BR></DIV>
  <DIV=20
  style=3D"FONT-FAMILY: Comic Sans MS, sans-serif; COLOR: black; =
FONT-SIZE: 14pt">FOTer's,<BR>I=20
  will assume this car has the stock style trans mount, not the later =
TR6 style=20
  setup...yeah I know about assuming anything, but here I go.<BR>In =
order to=20
  keep the rear of the trans where it belongs and yet allow some =
movement and=20
  inslulation this is the mod I have utilized.<BR>Remove the 2 trans to =
mount=20
  bolts and drill straight down thru those mounting holes thru the small =
trans=20
  crossmember. Enlarge those new holes in that crossmember to about 5/8" =
or so.=20
  Purchase 2 new bolts that are treaded all the way and are long enough =
to go=20
  thru the trans, the trans mount and the crossmember. Drop the bolt =
thru the=20
  trans and trans mount and start a nut up the bolt to tighten the trans =
to the=20
  mount. The bolt will now extend thru the trans, the mount (tighten the =
nut=20
  securely to hold them together) and the crossmember. Use a large =
washer and a=20
  nyloc on the bolt where it now extends thru the crossmember. Tighten =
this=20
  nylock only until it "just" contacts the crossmember. Because the bolt =
is=20
  smaller than the hole you just drilled it will allow the trans to move =
a small=20
  distance in any direction, but will stop any excessive movement, =
including=20
  saving the radiator in event of a serious impact!<BR><BR>Clear as=20
  mud?<BR><BR>A little out of balance in Nor Cal<BR>Nick<BR></DIV>
  <DIV><BR></DIV>
  <DIV><BR></DIV>-----Original Message-----<BR>From: Duncan Charlton=20
  &lt;[email-masked]&gt;<BR>To: toodamnfunky=20
  &lt;[email-masked]&gt;<BR>Cc: fot=20
  &lt;[email-masked]&gt;<BR>Sent: Mon, Jun 15, 2015 12:23 =
pm<BR>Subject: Re:=20
  [Fot] TR4 High speed driveline vibration<BR><BR>
  <DIV id=3DAOLMsgPart_2_45cce30f-f9f0-4a0d-b0fd-8426ec08d75f>
  <DIV=20
  style=3D"WORD-WRAP: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space"=20
  class=3D" aolReplacedBody">Jim,=20
  <DIV class=3Daolmail_><BR class=3Daolmail_></DIV>
  <DIV class=3Daolmail_>How are your motor and trans mounts? &nbsp;If =
they allow=20
  the engine/gearbox combo to shift out of line when under high torque, =
the=20
  u-joints could move out of proper alignment, but then when power is =
reduced,=20
  things would shift back into position. &nbsp;If you put the car on =
jackstands=20
  and run it to this rpm in top gear (might not be a bad idea to remove =
the=20
  drive wheels and tires if you=E2=80=99re sure they=E2=80=99re =
balanced) there won=E2=80=99t be much=20
  load on the engine, so if the vibration is due to deformation of the =
mounts,=20
  the vibration should not appear.</DIV>
  <DIV class=3Daolmail_>
  <DIV class=3Daolmail_>
  <DIV class=3Daolmail_><BR class=3Daolmail_>
  <DIV class=3Daolmail_>
  <DIV class=3Daolmail_>Duncan</DIV>
  <DIV class=3Daolmail_><BR class=3Daolmail_></DIV>
  <DIV class=3Daolmail_><BR class=3Daolmail_>
  <DIV>
  <BLOCKQUOTE class=3Daolmail_ type=3D"cite">
    <DIV class=3Daolmail_>On Jun 15, 2015, at 10:55 AM, <A =
class=3Daolmail_=20
    =
href=3D"mailto:[email-masked]">[email-masked]</A>=20
    wrote:</DIV><BR class=3Daolmail_Apple-interchange-newline>
    <DIV class=3Daolmail_>
    <DIV class=3Daolmail_>
    <DIV style=3D"FONT-FAMILY: Arial; FONT-SIZE: 12pt" class=3Daolmail_>
    <DIV class=3Daolmail_>FoT,<BR class=3Daolmail_></DIV>
    <DIV class=3Daolmail_>I have a driveline vibration that doesn't =
start up until=20
    I get to about 95- 100 MPH. I figured I would start with the=20
driveshaft</DIV>
    <DIV class=3Daolmail_>before looking into the diff or OD/trans. I =
have an IRS=20
    car with Richard Good CV axles and hubs so it's very un likely its =
that=20
    but</DIV>
    <DIV class=3Daolmail_>I will inspect them. I'm wondering if anybody =
has any=20
    advice on high speed vibration diagnosis or detection.</DIV>
    <DIV class=3Daolmail_>What I'm wondering is even if it is the =
driveshaft how=20
    would I know with it sitting on my bench. </DIV>
    <DIV class=3Daolmail_>Any help would, as always be greatly =
appreciated.</DIV>
    <DIV class=3Daolmail_>Jim=20
    =
g</DIV></DIV></DIV>_______________________________________________<BR=20
    class=3Daolmail_><BR class=3Daolmail_><BR class=3Daolmail_><BR =
class=3Daolmail_><BR=20
    class=3Daolmail_></DIV></BLOCKQUOTE></DIV><BR=20
  class=3Daolmail_></DIV></DIV></DIV></DIV></DIV></DIV></DIV>
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Verdana, Arial, Sans-Serif; COLOR: #000; FONT-SIZE: 12px"=20
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