1988 D100 rwd with 8 1/4 Carrier bearings

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ZBO - 16 Dec 2005 01:09 GMT

I replaced scored pinion bearings and set the pinion up ok. My problem is
when I adjust the backlash. Everything goes fine until I torque the
adjusters to 70ft lbs., with the brng. caps tightened to 100 ft lbs. Then
the bearing cups will not stay in position, they push in and lock the
carrier up. On close examination it looks like the cups may have turned
(spun). Otherwise the cups and carrier bearings look good. I'm wondering
if I inststall new carrier bearings and cups if the new ones would hold or
will I be wasting my money because the casting is shot?

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Christopher Thompson - 16 Dec 2005 02:05 GMT

are you sure you havent swaped the caps on the bearings right to left? by
accident maybe?

> I replaced scored pinion bearings and set the pinion up ok. My problem is
> when I adjust the backlash. Everything goes fine until I torque the
[quoted text clipped - 4 lines]
> if I inststall new carrier bearings and cups if the new ones would hold or
> will I be wasting my money because the casting is shot?

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ZBO - 16 Dec 2005 11:55 GMT

Thanks for the comeback Chris. The bearing caps were marked before removal
and were not switched. Also the cups and caps were thoroughly dry before
installing them. I thought maybe some oil was creating the problem so I
took it apart to make sure they were dry.

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ZBO - 24 Dec 2005 14:59 GMT

I went ahead and replaced the carrier bearings and cups also. Everything
torqued down ok with the new cups in place and the rear end is now smooth
and quiet.

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