4 Wheel Drive/SUVs: Front Wheels start Crimping on sharp turns, limited slip differential, alignment shop

Question
I have a '94 Grand Cherokee" with full time all  wheel drive. When the car is warm (after driving for more than 30 minutes), the front wheels start to crimp ( front wheels "thump") when I make a sharp turn (both direction).  My mechanic checked the front axle and the front limited slip differential but  they were ok.  Any suggestion as to what the potential problem could be?  Any assistance would be greatly appreciated.  Thanks.

Art

Answer
Art,

Without riding in, or driving the Jeep, it is extremely hard to diagnose this problem.  I would start out at a reputable alignment shop, and have them check it out.  If they can't find a problem, check out a transmission shop that specializes in 4-wheel drives.  Whoever you take the Jeep to, make sure that you have it warmed up, and have the mechanic take a ride with you, so you can show him the problem yourself.  This sounds like the front limited slip is grabbing.  Actually, I would confirm with someone that you have a limited slip in front.  This is not usually the case with full time 4 wheel drive.  Another possibility, is that your transfer case is binding causing the front end to engage when it shouldn't.

Carl