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post #1 of 3 Old 08-27-2003, 06:37 AM Thread Starter
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rear end problems

I can't seem to keep my rear u-bolts tight, and with my driving, i've axle wrapped my spring under and sheared all 8 bolts off of my rear ring gear. i got everything ready to go again, but i'm confused about my rear axle shims to angle the differential. the hole in the shims was made for a lot of play to move it forward or backwards and i'm not sure where at on the shim to torque my u-bolts back down. do i want it on the angle of the shim, or on the flat part at the top of the angle? They are 6 degree shims.

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post #2 of 3 Old 08-28-2003, 05:57 PM
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Ya got me on where your shim goes, but in general, with a lift you need to have the nose of the differential carrier pointing above the horizon. Seems like the shim should be placed to accomodate that. Did you do the lift? Do you still have the instructions? Can you go the the manufacturer's website and ask?? The diagrams of stock suspensions do not show a shim, so it must have come with the lift kit.

My factory service manual specifies 90 ft/lb torque to the ubolts.

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post #3 of 3 Old 08-29-2003, 07:10 AM
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I would think that you need new shims. The hole on mine was the same size as the center pin, so there's no play in it at all. It would appear to me that no matter how tight you tighten the ubolts, they will eventually move around causing problems. Do I have scientific data to back this I'm just going by a gut feeling that that shouldn't be like that. I would say get new shims with smaller holes or fatter center pins. Just my $.02


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