Someone please tell me how to identify what rear end I have?

[Steves94Z28]

Hey everyone....can someone please tell me or point me in the right direction on how to identify what rear end I have? After looking at my RPO codes, mine came with a GU5 3.23 and J41 which is front disc and rear drum. Mine are front and rear disc which tells me it has been swapped but with what? That's why I need to know.

[jderry]

Hey everyone....can someone please tell me or point me in the right direction on how to identify what rear end I have? After looking at my RPO codes, mine came with a GU5 3.23 and J41 which is front disc and rear drum. Mine are front and rear disc which tells me it has been swapped but with what? That's why I need to know.

The only way you will know for 100% is to pull the cover and look at the gears. If someone swapped in a disc rear, they may have put gears in it too.
It depends on what year the rear end is from, and what type of transmission the car it came from had.
If it is a stock gear, it is 2.73, 3.23 or 3.42.