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Old 02-26-2011, 04:13 PM   #1
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Default Pinion bearing

Hey folks I've got my rear diff that's been making a droning sound and I've finally gotten it figured out. But I've run into a problem I've got the parts in hand and I'm not entirely sure on how or the best way to pull and replace the pinion bearing so if there's anyone out there that has any info on how to do so. Thank you very much.
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Old 02-26-2011, 07:00 PM   #2
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I also highly recommend buying the crush sleeve eliminator from Summit (Ratech 4105)

Here's how I would do/have done the bearing replacement with the crush sleeve eliminator:

1) Remove diff cover
2) Measure current backlash with a dial indicator and write it down somewhere.
3) Check current pattern with marking compound and take a pic
4) Remove carrier
5) Remove pinion, yoke, seal, and bearing races
6) Remove and replace inner pinion bearing. Be sure to reinstall the shim that's under the bearing. You might have a shop do this part as it requires a bearing puller and a press if you don't have them.
7) Install new races in housing
8) Install pinion, crush sleeve eliminator with a few shims, outer bearing, oil slinger, yoke/flange, washer, and OLD pinion nut. Leave the new pinion seal out for now. Edit: If you measure the old crush sleeve, it will give you a good starting point for selecting shims.
9) Slowly torque the pinion nut to 125 ft lbs, checking the pinion bearing preload as you go. Add or remove shims from the spacer kit until you reach about 15-25 in lbs of preload.
10) Install carrier
11) Recheck pattern and backlash
12) Remove carrier and pinion and reinstall with new pinion seal and new pinion nut with red loctite
13) Torque pinion nut to 125 ft lbs
14) Replace diff cover and fill with gear oil!

Good luck.

Straight off Google from a jeep site, yeah Jeep but it was on an 8.8 Ford.

Depending on your mechanical ability I would have a shop do it, there are a lot of precise measuring and torquing going on here and if you mess something up say hello to a grenaded diff.
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