I've got this trans from a customer car. There is no pin through the case which indicates LSD, but the sticker clearly states M2A4. I always thought that M2B4 was an LSD trans. ??

 

could be an after market lsd.

 

or the pin is sheared. that tranny looks a little beat. put and axel in put it in gear and spin it in the other side spins the oposite way no lsd if a spins the same you got lsd. presonally I would bank on problems.