Join Date: Sep 2006
Location: Las Vegas, Nevada
A few concerns. If a new differential pinion needs a different shim the part will be marked as such on the head or side of the pinion. Example +0.002 or -0.003 or +0.001... Etc... You get the point, in that case you are to add or subtract that number to the current shim. If the new pinion gear wasn't marked as such then the factory shim should be reused unless it is beyond the point of reuse such as excessively worn or uneven wear due to destroyed/deteriorated bearings. Otherwise a "true" or +/- 0.000 is assumed to be true with the new part as per standards.
As far as the non collapsible pinion sleeve instead of the standard crush sleeve in my opinion those are for the backyard mechanic or customer who is likely to change gears frequently, it should not be needed by anyone who sets up gears properly for a living, the whole point is that it is reusable in case changes are needed.
Backlash and preload measurements would be helpful as well as a picture of your current tooth pattern for diagnostic assistance. At this point I'd also measure ring gear run out, I'm guessing this guy didn't even use new hardware on the ring gear as needed let alone follow the proper tightening sequence.
I've set up a few differentials Fords and Chevys. I don't like to do it because it's not my specialty and just like everything else I dedicate way too much time doing it then I'll get compensated for, especially if it's for a close friend, family member, or one of my own personal vehicles. Unless it's right I don't want my name associated with it.
-1996 Pearl White Thunderbird 4.6 Sport 4v with many mods:
Current Best: 13.583 @ 103.74 10/2014.
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-2001 White Ford F-250 Super Duty 6.8 V10, 4-door, 4x4, Limo Tint, BFG KO2's, Bilstein 7100 Remote Reservoir Race Bypass Shocks, 6" Spring lift, Kenwood Double Din, K&N Intake, FlowMaster Exhaust
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-2005 White GMC Sierra 3500 6.6 Duramax, Dually, 4-door, 4x4, Limo Tint, BFG Commercial T/A's, Rancho RS9000XL Shocks, Kenwood Double Din, K&N Intake, Banks Monster Exhaust
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