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Just want some input on this pattern. All I have on hand is the crappy blue compound so forgive me. These are 4.56 gears in a 98 10 bolt with all new bearings and races.
The contact patch seems small to me. Pinion shims are about .08 in total I forget exactly. Backlash is .0125.
I took it back apart to check the pinion bearing and replace the crush sleeve again. It whined under light to no throttle.
You don't need a heavy coat, too heavy and it'll do a carry-over smear to cover the true pattern. But you really use the proper compound. White grease works well too.
4.56s in the 10 bolt, I've been running 4.56s' in my 98Z for many years, behind an A4. What's your tranny, stick or auto ?
I see you had to taper shave the ring gear teeth to get the torsen paddle in. Mines an Eaton carrier that I had to do that to.
Well I pretty much fixed the whining noise now. Its still there but might clear up as things break in.
I don't know how I ended up on the path that lead to so much pinion shim but when I disassembled it I had almost 0.100 worth of shims. Put together a setup to get a rough measurement of the pinion depth, matched that to the gears spec with .048 worth of shims, installed a new pinion bearing and got a good and clear pattern that I was happy with with .012 backlash.
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Gear pattern input 
