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post #1 of (permalink) Old 12-23-2000, 03:00 PM
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rear diff troubles!

Sorry if you have already read this in the tuck forum but I wanted to make sure I contacted everyone who might be of help. I have an 8.8 rear axel and the regeared it to 4.10 one year ago. The guiys at six states distrubutors told me that my pinion is losse probably because the crush sleeve was not tightened down enough. The diff seem pretty quiet though. I still need to open it up and look for metal shavings. My question is, is there anything I can do to save my diff or do I need to regear it again. I can get the ring and pinion warrantied so the expense would be labor and probably bearings. Any ifo would be of great help. Thanks

Beat that sucker into submission!
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post #2 of (permalink) Old 12-23-2000, 08:04 PM
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Re: rear diff troubles!

Well if it's quiet then what is your complaint about it? Slack? If your gears haven't eaten themselves alive you can just get a new crush sleeve and torque it correctly, which requires an in-lb torque wrench. I think without a load it should read around 40 in-lbs before it starts to rotate. Good luck.

It's a Jeep thing? My Bronco thing will run over your little Jeep thing.

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post #3 of (permalink) Old 12-23-2000, 11:44 PM
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I agree !

A crush collar costs less than the labor charge to replace the R&P, and if it doesn't work, you haven't lost much.

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post #4 of (permalink) Old 12-26-2000, 03:54 PM
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Re: rear diff troubles!

Thanks for the info. One question though. Isn't the crush sleeve in between the two pinion bearings which means that I have to take out the carrier and then take out the pinion which is almost the same as rebuilding the thing except that I can use all the existing shims. Does this make sense or am I missing something?

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post #5 of (permalink) Old 12-27-2000, 10:43 AM
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Re: rear diff troubles!

The crush collar sits under the top pinion bearing (between the two), but can be easily gotten to. Remove the nut and yoke from the pinion and pull out the seal. The top bearing loosely sits on the pinion shaft and can just be slid off and the crush collar can be replaced.

You will want the bearing preload to be 8-10 lb. in. rotating force. This requires a couple hundred lb. ft. of torque on the pinion nut. I would check the pattern before installing the new crush collar to make sure everything lines up correctly. On final assembaly, install the crush collar and go crazy with the red lock tight on the pinion nut. Once its down, take a center punch and whack the side of the pinion nut in a couple of places. This will keep the nut from backing off.

If it ain't broke, I can probably still fix it.
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