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Re: drive train rumble 700 1988

posted by  someone claiming to be dscherm on  Mon Jul 9 19:28 CST 2001 [RELATED]

I completely agree with the shimming solution. The U-joints on these cars almost never fail. If there's no leak at the transmission rear seal, DON'T MESS WITH IT! Also, you can actually lubricate the centre bearing; it's in the 700/900 FAQ.

The other thing you should look at is the control arm bushings which (if you have a solid axle, sounds like you do) stop the axle from twisting; my 1988 745 had really worn bushings and you could actually move the wheel about 10 degrees with the parking brake on. The axle twist will cause the driveshaft to deflect, aggravating your rumbling.

As for the transmission mount, check that as well; if it's bad, look to be possibly doing the engine mounts. But it doesn't sound to me like tranny mount.





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