Can someone tell me how I can tell if my '91 G20 has a locking or a non-locking diff.? Can I look at the transmission serial number & tell? I read somewhere that this was possible but I can't remember what to look for.
Failing that, if I jack the front end of the car up, what is the difference in the way that the wheels spin whaen I put it in drive?
Thanks for all of your help.