Rear Differential Pontiac Vibe Loud Metallic "clunk" Heard Even When Driving Over Tiny Bumps? Shocks? Lower Control Arm? Rear Differential?

Loud metallic "clunk" heard even when driving over tiny bumps? Shocks? Lower control arm? Rear differential? - rear differential pontiac vibe

I have a '99 Pontiac Firebird Trans Am WS6. I replaced the back there are about 2 years she has directed and grinding loud (I had all F-Body rear differential is one to go wrong after about 80 miles 90k). I have replaced the back is a mistake to leave now (it was another F-body GM rear done, but I think the place you bought it had made a mistake with the Game Gear Ratio - my speedometer and distance ) from the substitute.

As the mechanic replaced my rear differential, one could hear a metallic "click" on the driver's side rear of the car every time there was a bump. At first it was only heard on the road of obstacles. But in the last 2 years has been getting worse,and now I can hear a "click" even when I ride on something as simple as turn arrows on the asphalt, which has painted many times. It's terrible when you cross the historic district of my city, where brick streets in general are too. The command affected by noise, if you're a Brick Road is almost stronger than the custom exhaust on my car!

I thought it might be the crisis, rings forearm command or installation errors with all of the back. The original claims, mechanic was a good setup, but of course he will say. She saw nothing wrong. I will get another store, but I wanted some comments from you, what do you think it could and what you think, I listen to expECT to pay for parts and labor.

Can offer Thanks for the help! (For details, see details about my question and I add)