HYPOID GEAR OIL Probably 80-90 weight with limited slip additive.
find a posi out of a z28 and swap the whole axle assembly
Yes
yes, all 1979 Camaro Z28's came with a 3.73:1 posi traction rear end.
probably a 3.43.
Yes
The 87 comaro if stock takes GL90 gear oil , if its a posi you will need a special additive Good luck
may be a bad or worn ring and pinion gear axel brgs' or low gear oil
If its a z28, then yes. The base models did not include the posi rear end
80/90 gear lube
Depends on what's wrong with it, Sparky...
A limited slip diff, yes
10 bolt