for stock eom gears
max runout of back face .003"
diff bearing preload case spread
new bearings .008-.012
old bearings .005-.008
pinion preload crush spacer
old bearings 8-14 INCH pounds(not foot)
new 20-30
Well People,
Even an old dog can get schooled.
I will NEVER re use a ring and pinion again, it is just not worth the frustration.
Even though the ring and pinion were pristine and I had no bearings that were even close to failing it is darn near IMPOSSIBLE to get a perfect pattern on used gears.
I would be willing to bet that if you do, you are going to be in trouble.
Kind of had to reverse engineer the whole thing.
My original intent was to just replace the open case with limited slip case.
Really glad that I measured some with the unit before I took it down.
I measured backlash, and adjuster hole locations and took a quick pattern check and made a little drawing of the contact patterns.
I was soon to realize that I could easily change the pattern on the coast side but not the drive side (that is where most of the wear is going to occur.
What I learned was to read between the lines (patterns).
there are spots where the pattern WAS, IS, and never has been and a place where the pattern never will be.
All I could do was make sure that the pattern was centered between the ROOT and TOP sides of the coast side of the teeth, which it was
and not pay too much attention to whether it was towards the HEEL or TOE.
The pattern on the DRIVE side tended to be pretty much covering the whole tooth except for the fact that there was NO contact at the ROOT or the TOP on the HEEL end and the same at the TOE end.
Where the pattern was NOT told me I was somewhat centered from root to root to top and also from toe to heel.
Now for the out of the box part.
After I had the initial pattern with the goldish colored marking compound, I took a heat gun and attempted to dry it out and then painted some white compound where the pattern was NOT located.
This did very little on the coast side, but it did help show on the drive side, show where the pattern was NOT.
It was a combination of color difference and amount of compound build up.
As it stands, I don't know where the pattern is, but I know where it is not, and I don't know where it should have worn in to.
Ended up with the same pinion shim thickness and both of the screw adjusters are changed by 3 holes, left being 3 looser and right being 3 tighter.
Case spread .008'' pinion tq= 10 lb.in. and case runout is barely .001''
If I were still working flat rate, I would be a poor boy.
Boilermaster