Locking rear wheels

Hello,

I have a 1990 3.6L V8 that I am currently repairing. It has not been driven on the road for about 4 years now and I'm noticing every time I drive it out of my shop and make a tight turn the rear wheels seem to be locking up. The wheels will spin and jerk, has anyone ever noticed anything like this? The rear differnetial has a little leak from the seal, could this low fluid cause the problem maybe?

Thanks,

Kristian

90 V8 (75,000 km)
89 200Q (183,000km)
90 100 (182,000km)