ok, so I have this lsd, I took it from a GSR tranny, I Know it's an OBX and it doesn't have a model number, I need to count splines to verify it is a GSR LSD, I am selling it so I just want to verify for whoever buys it so they have piece of mind. How many splines would a GSR diff have as opposed to a B16 or LS??

 

I'm really not sure, but aren't they the same?

 

Apparently not, I guess something with the bolt pattern and the splines are different with the GSR versions, and on the dealer site they are a different part number