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Hi Scott,
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 the book
preload spec you are using (no seal/new bearings). The only "trick" I've
noticed, the static friction (break free) torque is always a bit higher, I
measure the actual torque to rotate once moving.
Jason
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
> *12-16 lb/inch pre-load,* using a bar affixed to the input flange and a
> sliding weight. Of course there is a churchhill tool for that!
>
> 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.
>
> 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.
>
> 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.
>
> Thanks,
> Scott
> _______________________________________________
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>
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>
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<div dir=3D"ltr">Hi Scott,<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Instead of=
the bar and weight method, I have a 0-30 in*lbs dial type torque wrench I =
use.=C2=A0 For the spitfire/GT6 diffs, I use the book preload spec you are =
using (no seal/new bearings).=C2=A0 The only "trick" I've not=
iced, the static friction (break free) torque is always a bit higher, I mea=
sure the actual torque to rotate once moving.</div><div><br></div><div>Jaso=
n</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=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></div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex"><div style=3D"overflow-wrap: b=
reak-word;">I=E2=80=99m rebuilding my differential.=C2=A0 The manual says t=
he pinion bearings should be assembled with spacers to yield a=C2=A0<div><u=
>12-16 lb/inch pre-load,</u> using a bar affixed to the input flange and a =
sliding weight.=C2=A0 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.=C2=A0 I=E2=80=99m guessing this =
is supposed to be 12 inch-pounds,</div><div>which I think means a one pound=
weight at the end of a 12=E2=80=9D lever.=C2=A0 All testing is performed w=
ith the seal removed.</div><div><br></div><div>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 fee=
ls pretty stiff already.</div><div><br></div><div>Anyone have any experienc=
e with this?=C2=A0 This is a GT6 diff, but I=E2=80=99m guessing the instruc=
tions don=E2=80=99t vary much.</div><div><br></div><div>Thanks,</div><div>S=
cott</div></div>_______________________________________________<br>
<a href=3D"mailto:fot@autox.team.net"; target=3D"_blank">fot@autox.team.net<=
/a><br>
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et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://autox.team.net/archive"; rel=3D"noreferrer" targe=
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et/pipermail/fotUnsubscribe/Manage" rel=3D"noreferrer" target=3D"_blank">ht=
tp://www.team.net/pipermail/fot<br>
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<br>
</blockquote></div>
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_______________________________________________
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Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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