Whining Noise coming from rear end

[BTits]

I have a 89 gt with 4.10 gears and last week before I brought it to a shop for a clutch and tranny repair, I've been hearing a weird whining noise coming from the rear end I think. I recently had a new water pump put on a month ago and the mechanic said when he drove it around, he heard noises coming from the rear end also. This mean I need a new one or is there certain procedures that can be done without replacing the whole thing? Is there any place that I can take it to that specializes somewhat in rear ends?

 

[ProCharger GT]

how long ago did you get the gears? did you get the complete rebuild kit for the rear too?

 

[Reimann]

Maybe you have a Chevy behind you...