Need help with rear axle code

[first64]

I've done a search and can't seem to figure out the axle tube code. I just bought this rear it's suppose to be a GN rear. It is a 8.5 with a 410508N Posi carrier. I didn't check the ratio yet. From what I can make out on the axle tube it reads: 6TP G 147. I can't find this '6TP' any where. The pumpkin doesn't look like a Olds it only has one support rib on each side. Is there anything else I can check to confirm it's a GN rear?

Thanks for any help.

 

[1CleanT]

I've done a search and can't seem to figure out the axle tube code. I just bought this rear it's suppose to be a GN rear. It is a 8.5 with a 410508N Posi carrier. I didn't check the ratio yet. From what I can make out on the axle tube it reads: 6TP G 147. I can't find this '6TP' any where. The pumpkin doesn't look like a Olds it only has one support rib on each side. Is there anything else I can check to confirm it's a GN rear?

Thanks for any help.

Limited rears should be 3TP for Buick and 3TJ for conventional rears.

Although it might be from an 84 Gn it has a "6TP" code for 8.5 rear.. limited slip.