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Same here but in my case for big TRs. Also recheck the preload after a very b=
rief break-in period. Sometimes things settle in and I have heard of loss of=
preload.=20
If you have never done it, the preload can seem like a very stiff bearing se=
tup.=20
Sent from my iPhone
> On Jan 28, 2020, at 4:02 PM, Jason Sukey via Fot <fot@autox.team.net> wrot=
e:
>=20
> =EF=BB=BF
> Hi Scott,
> Instead of the bar and weight method, I have a 0-30 in*lbs dial t=
ype torque wrench I use. For the spitfire/GT6 diffs, I use the book preload=
spec you are using (no seal/new bearings). The only "trick" I've noticed, t=
he static friction (break free) torque is always a bit higher, I measure the=
actual torque to rotate once moving.
>=20
> Jason
>=20
>> On Tue, Jan 28, 2020 at 4:35 PM Scott Janzen via Fot <fot@autox.team.net>=
wrote:
>> I=E2=80=99m rebuilding my differential. The manual says the pinion beari=
ngs should be assembled with spacers to yield a=20
>> 12-16 lb/inch pre-load, using a bar affixed to the input flange and a sli=
ding weight. Of course there is a churchhill tool for that!
>>=20
>> Either I=E2=80=99m not grasping the concept, or 12 lbs per inch doesn=E2=80=
=99t seem right. I=E2=80=99m guessing this is supposed to be 12 inch-pounds=
,
>> which I think means a one pound weight at the end of a 12=E2=80=9D lever.=
All testing is performed with the seal removed.
>>=20
>> Even if I am correct, I=E2=80=99ve got it set up with about a 1/2 lb pre-=
load right now, and that feels pretty stiff already.
>>=20
>> Anyone have any experience with this? This is a GT6 diff, but I=E2=80=99=
m guessing the instructions don=E2=80=99t vary much.
>>=20
>> Thanks,
>> Scott
>> _______________________________________________
>> fot@autox.team.net
>>=20
>> http://www.fot-racing.com
>>=20
>> Donate: http://www.team.net/donate.html
>> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/jsukey@gmai=
l.com
>>=20
>>=20
> _______________________________________________
> fot@autox.team.net
>=20
> http://www.fot-racing.com
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/gblake58tr3@=
icloud.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">Same here but in my case for big TRs. Also r=
echeck the preload after a very brief break-in period. Sometimes things sett=
le in and I have heard of loss of preload. <div><br></div><div>If you h=
ave never done it, the preload can seem like a very stiff bearing setup.&nbs=
p;<br><br><div dir=3D"ltr">Sent from my iPhone</div><div dir=3D"ltr"><br><bl=
ockquote type=3D"cite">On Jan 28, 2020, at 4:02 PM, Jason Sukey via Fot <=
fot@autox.team.net> wrote:<br><br></blockquote></div><blockquote type=3D"=
cite"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"ltr">Hi Scott,<div> =
Instead of the bar and weight method, I have a 0-30 in*=
lbs dial type torque wrench I use. For the spitfire/GT6 diffs, I use t=
he book preload spec you are using (no seal/new bearings). The only "t=
rick" I've noticed, the static friction (break free) torque is always a bit h=
igher, I measure the actual torque to rotate once moving.</div><div><br></di=
v><div>Jason</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" clas=
s=3D"gmail_attr">On Tue, Jan 28, 2020 at 4:35 PM Scott Janzen via Fot <<a=
href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</a>> wrote:<br></d=
iv><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;borde=
r-left:1px solid rgb(204,204,204);padding-left:1ex"><div style=3D"overflow-w=
rap: break-word;">I=E2=80=99m rebuilding my differential. The manual s=
ays the pinion bearings should be assembled with spacers to yield a <di=
v><u>12-16 lb/inch pre-load,</u> using a bar affixed to the input flange and=
a sliding weight. Of course there is a churchhill tool for that!</div=
><div><br></div><div>Either I=E2=80=99m not grasping the concept, or 12 lbs <=
u>per</u> inch doesn=E2=80=99t seem right. I=E2=80=99m guessing this i=
s supposed to be 12 inch-pounds,</div><div>which I think means a one pound w=
eight at the end of a 12=E2=80=9D lever. All testing is performed with=
the seal removed.</div><div><br></div><div>Even if I am correct, I=E2=80=99=
ve got it set up with about a 1/2 lb pre-load right now, and that feels pret=
ty stiff already.</div><div><br></div><div>Anyone have any experience with t=
his? This is a GT6 diff, but I=E2=80=99m guessing the instructions don=
=E2=80=99t vary much.</div><div><br></div><div>Thanks,</div><div>Scott</div>=
</div>_______________________________________________<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://autox.team.net/archive"; rel=3D"noreferrer" target=
=3D"_blank">http://autox.team.net/archive</a> <a href=3D"http://www.team.net=
/pipermail/fotUnsubscribe/Manage" rel=3D"noreferrer" target=3D"_blank">http:=
//www.team.net/pipermail/fot<br>
/jsukey@gmail.com" rel=3D"noreferrer" target=3D"_blank">http://autox.team.ne=
t/mailman/options/fot/jsukey@gmail.com</a><br>
<br>
<br>
</blockquote></div>
<span>_______________________________________________</span><br><span>fot@au=
tox.team.net</span><br><span></span><br><span>http://www.fot-racing.com</spa=
n><br><span></span><br><span>Donate: http://www.team.net/donate.html</span><=
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l/fot</span><br><span>Unsubscribe/Manage: http://autox.team.net/mailman/opti=
ons/fot/gblake58tr3@icloud.com</span><br><span></span><br><span></span><br><=
/div></blockquote></div></body></html>=
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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