well, my question is:
how can i figure out the gearing (3.15 - 3.46 - 3.64) of a certain diff without taking it apart.
may be looking to purchase a diff, but almost certain it has no tags, like the stock ones do.:shifty
can anybody help?:help

put a mark on the input shaft and one on the output side, turn the input shaft one revalution and count how many times the output shaft turns. if its in the car jack up the rear and do the same thing but mark the tire