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The spreader was released prior to taking these readings.=20
I checked the backlash at 4 locations roughly 90 degrees apart and I am with=
in 0.0005=E2=80=9D so I think the carrier flange is straight enough.=20
I have tried the pinion depth from 0.735=E2=80=9D to where it is in the pict=
ures with 0.020=E2=80=9D shim under the pinion race, at 0.715=E2=80=9D.=20
At 0.735=E2=80=9D (no pinion shim) the drive side pattern was at the toe and=
the coast side was off of the heel.=20
As I added pinion shim, moving the pinion toward the ring gear, to get to wh=
ere it is now, the drive side pattern has moved toward the center position b=
etween the toe and heel with a little bias toward the toe. I think this is o=
k because as the gear is loaded, the pinion is pulled into the ring gear fur=
ther therefore would tend to center the engagement on the driven side.=20
My concern lies with the coast side. It also moved more central as I added p=
inion shim, but is still more biased toward the heel than I=E2=80=99d like t=
o see.=20
I can=E2=80=99t seem to get the two patterns to align more toward the center=
.=20
For a race car, should I be concerned with this coast side pattern?
Thanks.=20
Greg
Sent from my iPhone
> On Nov 12, 2018, at 9:13 AM, Bob Kramer <rkramer56@gmail.com> wrote:
>=20
> Is the spreader released? Not sure if that distorts anything but it is dif=
ferent one side to the other. Did you check the runout without the ring gear=
attached?=20
> I would worry more about the driven side and raise the pinion depth to mov=
e that pattern to the middle,
>=20
>=20
> Bob Kramer
>=20
>=20
>> On Sun, Nov 11, 2018 at 8:10 PM Greg Blake via Fot <fot@autox.team.net> w=
rote:
>> Attached are pics of the gear mesh patterns on the drive and coast faces o=
f the ring gear on the diff. These are new gears from Bastuck which are the O=
erlikon type. I like the drive side pattern but the coast pattern looks a li=
ttle high.=20
>>=20
>> The pinion is set at 0.715=E2=80=9D depth and backlash is at 0.004=E2=80=9D=
>>=20
>> I have moved the pinion 0.020=E2=80=9D deeper in the housing at 0.005=E2=80=
=9D increments and the drive side pattern just moved to the tow side.=20
>>=20
>> Should I be worried about the coast side or leave it alone?
>>=20
>> Thanks.=20
>>=20
>> Sent from my iPhone_______________________________________________
>> fot@autox.team.net
>>=20
>> http://www.fot-racing.com
>>=20
>> Donate: http://www.team.net/donate.html
>> Archive: http://www.team.net/pipermail/fot
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/rkramer56@g=
mail.com
>>=20
>>=20
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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>The spreader was released prior to tak=
ing these readings. </div><div><br></div>I checked the backlash at 4 lo=
cations roughly 90 degrees apart and I am within 0.0005=E2=80=9D so I think t=
he carrier flange is straight enough. <div><br></div><div>I have tried t=
he pinion depth from 0.735=E2=80=9D to where it is in the pictures with 0.02=
0=E2=80=9D shim under the pinion race, at 0.715=E2=80=9D. </div><div><b=
r></div><div>At 0.735=E2=80=9D (no pinion shim) the drive side pattern was a=
t the toe and the coast side was off of the heel. </div><div><br></div>=
<div>As I added pinion shim, moving the pinion toward the ring gear, to get t=
o where it is now, the drive side pattern has moved toward the center positi=
on between the toe and heel with a little bias toward the toe. I think this i=
s ok because as the gear is loaded, the pinion is pulled into the ring gear f=
urther therefore would tend to center the engagement on the driven side.&nbs=
p;</div><div><br></div><div>My concern lies with the coast side. It also mov=
ed more central as I added pinion shim, but is still more biased toward the h=
eel than I=E2=80=99d like to see. </div><div><br></div><div>I can=E2=80=
=99t seem to get the two patterns to align more toward the center. </di=
v><div><br></div><div>For a race car, should I be concerned with this coast s=
ide pattern?</div><div><br></div><div>Thanks. </div><div><br></div><div=
>Greg<br><br><div id=3D"AppleMailSignature" dir=3D"ltr">Sent from my iPhone<=
/div><div dir=3D"ltr"><br>On Nov 12, 2018, at 9:13 AM, Bob Kramer <<a hre=
f=3D"mailto:rkramer56@gmail.com";>rkramer56@gmail.com</a>> wrote:<br><br><=
/div><blockquote type=3D"cite"><div dir=3D"ltr"><div dir=3D"ltr">Is the spre=
ader released? Not sure if that distorts anything but it is different one si=
de to the other. Did you check the runout without the ring gear attached?&nb=
sp;<div>I would worry more about the driven side and raise the pinion depth t=
o move that pattern to the middle,<div><br></div><div><br clear=3D"all"><div=
><div dir=3D"ltr" class=3D"gmail_signature" data-smartmail=3D"gmail_signatur=
e"><div dir=3D"ltr">Bob Kramer</div></div></div><br></div></div></div><br><d=
iv class=3D"gmail_quote"><div dir=3D"ltr">On Sun, Nov 11, 2018 at 8:10 PM Gr=
eg Blake via Fot <<a href=3D"mailto:fot@autox.team.net";>fot@autox.team.ne=
t</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:=
0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Attached are pics of=
the gear mesh patterns on the drive and coast faces of the ring gear on the=
diff. These are new gears from Bastuck which are the Oerlikon type. I like t=
he drive side pattern but the coast pattern looks a little high. <br>
<br>
The pinion is set at 0.715=E2=80=9D depth and backlash is at 0.004=E2=80=9D<=
br>
<br>
I have moved the pinion 0.020=E2=80=9D deeper in the housing at 0.005=E2=80=9D=
increments and the drive side pattern just moved to the tow side. <br>
<br>
Should I be worried about the coast side or leave it alone?<br>
<br>
Thanks. <br>
<br>
Sent from my iPhone_______________________________________________<br>
<a href=3D"mailto:fot@autox.team.net"; target=3D"_blank">fot@autox.team.net</=
a><br>
<br>
<a href=3D"http://www.fot-racing.com"; rel=3D"noreferrer" target=3D"_blank">h=
ttp://www.fot-racing.com</a><br>
<br>
t=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/fot"; rel=3D"noreferrer" ta=
rget=3D"_blank">http://www.team.net/pipermail/fot</a><br>
amer56@gmail.com" rel=3D"noreferrer" target=3D"_blank">http://autox.team.net=
/mailman/options/fot/rkramer56@gmail.com</a><br>
<br>
<br>
</blockquote></div>
</div></blockquote></div></body></html>=
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/pipermail/fot
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