[QUOTE]Originally posted by dw
The standard plastic diff is the lightweight diff. Old cars had steel outdrives instead.
It is normal for the adjustment on the diffs to back off when you first use them after rebuilding. It takes a while for the parts to seat. If you readjust your diffs they should be fine unless you have been running them loose for any length of time.
There is a way to reduce the amount the diff backs off.
After you build the diffs you should apply throttle whilst holding one wheel. This will help seat the components. You must then check the diff adjustment again.
The diff may back off when you run it but it won't back off nearly as much.
Thanks, and good morning! I will check that this morning. After I finished adjusting the rear diff. yesterday, it is kind of tight right now. Where if you turn one of the rear wheels, the other turns the same direction. but if I back out the screw anymore, there seems to be slippage. Maybe the diff balls, and maybe even that gear are worn out. When I rebuilt them recently, I didn't replace the diff. balls, and I know you should. One of the D Rings wasn't seating real well on the outdrive. The outdrive seemed to be rounded, so it wasn't a perfect fit.
Since my TC3 is about 1.5 years old, and I don't think the diffs. have ever been completely replaced, maybe it would be a good idea to just buy new diffs., and replace everything.