Looking for Advice on Ring & Pinion Pattern

[pjmoreland]

I installed a used set of gears in my rear end and I've run patterns at multiple pinion depths. Would anyone be willing to take a look at the patterns and offer me your opinion about which one is the best, please? Photos can be found in this thread:

http://67-72chevytrucks.com/vboard/s...13#post9088013

Thank you.

[kwmech]

.0285ps and 9bl looks to be the closest to the original. Still a chance of a little noise

[pjmoreland]

Originally Posted by kwmech

.0285ps and 9bl looks to be the closest to the original. Still a chance of a little noise

Thanks so much for taking a look. The .0285 pinion shim just so happens to be the original shim from my current rear end housing. The donor gear set had a .027 shim. I wish I had a pinion depth measurement from the donor rear end housing to go off of, since the shim is accounting for variations in the gear set and housing. I will run the .0285/.009 setup and will see how it goes. It does seem to be the best pattern of the bunch in terms of toe/heel centering. I wish the drive side pattern were not so deep toward the root, but that just seems to be the way it is in all of the patterns except for .023 pinion shim, but then the coast side pattern is awful in that setup.

Thanks again!