Ok, so I crawled under my car last night to see if I could read the axle identification code on the axle housing. I couldn't find anything anywhere. I brushed the thing down to the bare metal and still nothing. I'm pretty sure I have a BW axle, because the RPO code says I have a 2.77 ratio. But, I just want to make sure no one swapped it out. Any ideas on where it could be? It's an 87 Trans Am.

 

Don't waste your time looking for the housing code. If it has the 9-bolt cover, it is a BW rear. Accept the fact or pull the cover.