In that link I posted there are two colums. The codes under conventional are for open rears and the ones under lock are the limited slip codes. The third column lists the ratio that those codes are for. When looking at a diff there will be a tag on one of the cover bolts. This tag has a bunch of numbers but the most important is the ratio which as an example a 3.27 ratio rear will be 3 27 for an open and 3L27 for a locking rear.i know it sounds stupid but which ones on that chart actually have a locking rear end in it , if im write it's the ones with 2 letter/numbers under the AX right
ha, I forgot about that way. It is the easiest.Icarus said:Put the rear end of the car in the air with the wheels free (jack stands), put it in neutral and spin one of the tires with your hand. If the other tire spins the same way, you have a trac loc... if it doesn't, its an open diff.
EDIT: still won't work on a worn out unit...jack up the rear so that one tire is on the ground and the other isn't and try to turn the wheel