gm 10 bolt pinion play

[Takid455]

what is the proper amount of play for the pinion and rings gears when setting up a gm 8.5" 10 bolt? I heard .008-.012" for ring gear to pinion gear clearance is accecptable.

[MrQuick]

for gear lash thats correct. I like to run them right at .008

[Tiger]

I prefer them tight as well, I always try to run them as close to the lower limit as possible.

[Takid455]

what about setting up the pinion gear initially? i am planning on using shims as opposed to the crush collar system, is this way better?

[MrQuick]

you use the shims between the inner bearing and pinion to set pinion depth then the crush sleeve is to set the pinion bearings pre load. i like to set to 22-25 inlbs rotating torque.

[chicane67]

Lash should also be tuned for the weight of the oil used. If you use a 90wt... 0.008" is good; if you use 140wt... 0.010". This will help with getting enought oil into the set to help combat the impact loading.

A solid spacer is the prefered component for performance use. It will definately negate and preload changes like that of the crush type pieces.

[68nate]

Lash should also be tuned for the weight of the oil used. If you use a 90wt... 0.008" is good; if you use 140wt... 0.010". This will help with getting enought oil into the set to help combat the impact loading.

A solid spacer is the prefered component for performance use. It will definately negate and preload changes like that of the crush type pieces.
First time I've heard of using a solid spacer. Do you just set it to the same rolling torque?

[chicane67]

Yes...

[strangler]

you use the shims between the inner bearing and pinion to set pinion depth then the crush sleeve is to set the pinion bearings pre load. i like to set to 22-25 ftlbs rotating torque.
Don't you mean inch pounds?

[Skip Fix]

Ratech makes the solid "crush sleeves". They also have shims to put behind the bearign race vs behind the bearing if a press isn't handy.

[MrQuick]

Don't you mean inch pounds? yep your right. Torque to 200ftlbs then tighten further to get 25 inlbs in rotational torque.

Solid spacer sounds like a good idea. Havent used one yet.

So you put the shim behind the outer bearing race?