Originally Posted by C4vettrn
What do you use for pinion preload? FSM says 30 in. lbs. and Yukon manual say's 16-20 for new bearings. That seems like a big difference?
What is to much backlash for the street? My pattern actually looks a little better with .013 but the FSM say's .006-.009 and YUKON
.008-.010 so I thought I should lower it some. I assume once the bearings settle the backlash would increase a hair?
It depends on what type of pinion you have.... All the Yukon gears I have set up in D44HD's are the crush sleeve style pinion and they are 16-20 inch LBS....
The factory gear is a shim type and they can probably get away with more (30inch LBS) initial pre load on the pinion brg because the flat shims will grow less with heat (than a tubular crush sleeve).
The D44HD has a very tight B/L spec IMO... I set my personal Yukon 4.11 in my 92 up at .008 (you want tight B/L for drag racing with a stick shift) and it howls a little bit on deceleration once it's hot driving on the hwy...
If I were setting a gear up for a milder car I would probably set B/L up towards the looser end of the spec... but that also depends on how long I screwed around with pressing/pulling those carrier brgs to get the pattern and then B/L anywhere in the spec...