Ive got a 96z auto. After my car warms up, the rear-end will howl a little bit when I make turns. It will also make a clicking sound going straight, under very lite loads. What am I worried about now? Fluid change prolly wont help, will it?

 

What is yoru mileage? How often has the fluid been changed? Was GM ADDITIVE added? A fluid change is a cheap start...