Locked up Diff in Reverse??

[ABSVX]

I have a '94 LSi in good condition other than a slightly sick transmission (1/2hard shift and possible slight slip in 3).

I have a new problem!

When I reverse the car with the wheels on fairly full lock, I sometimes get a bump/clunk from the front wheel area. Although I can't physically see what's happening (i'm in the car driving!), I'm 100% sure that the tires are skipping sideways across the asphalt rather than rotating smoothly at different speeds. I know the SVX has a sophisticated AWD system, but it acts in reverse and full lock as if it has a fully locked up 4x4 system. I had a '71 Suburban and when all the diffs were locked, I had a very similar sensation (I know it's a no-no to drive in lock-up on a hard surface), but I hope my description of the symptoms might help someone identify the problem -- diff, transmission or related to the repairs/changes below??

More Info -- I had my old worn out mismatched (front-to-rear) summer tires re-installed (new ones on order!!) and the front right wheel bearing and sway bar links replaced recently, and it was only AFTER this that I noticed the problem. Coincidence?? Doesn't seem like these repairs/changes could cause the symptoms I'm experiencing.

Can anyone out there offer a diagnose, test, suggestion and and suggestions for a cure??

Thanks, Mike

'94 LSi Barcelona Red with 80K miles and slightly sick tranny

[ABSVX]

Still a problem though maybe getting better, but figure 8's in reverse still show symptoms

[1986nate]

Originally Posted by ABSVX

More Info -- I had my old worn out mismatched (front-to-rear) summer tires

This is your big problem Hopefully you haven't fully fried your transfer clutch. Mismatched tires or tires of varying tread depth are a big no-no...