[Fot] Differential Pre-load

[Bill Tobin]

Hi Scott I think that's the torque required to turn the pinion. Put a 
socket to fit the pinion nut on a?? inch pound torque wrench; measure how 
much torque it takes to turn the pinion. Get it turning and read the 
torque wrench while turning it. 12 to 15 inch pounds sounds ok. With 
shims either add or remove shims to get the correct preload. Thicker to 
lessen and thinner to increase I think.

With a collapsible spacer it's easier. Keep?? tightening the nut and 
measuring the preload until it's right. Small increments. If you over 
tighten you take it apart and start over with a new spacer. (Ask me how 
I know this!)

Also a "clicker" torque wrench isn't the ticket for this. Use an older 
beam type.

Hope this helps.

Cheers Bill

On 1/28/2020 4:34 PM, Scott Janzen via Fot wrote:
> I???m rebuilding my differential. ??The manual says the pinion bearings 
> 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???m not grasping the concept, or 12 lbs _per_ inch doesn???t seem 
> right. ??I???m guessing this is supposed to be 12 inch-pounds,
> which I think means a one pound weight at the end of a 12??? lever. ??All 
> testing is performed with the seal removed.
>
> Even if I am correct, I???ve 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???m 
> guessing the instructions don???t vary much.
>
> Thanks,
> Scott
>
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