check the stamped # on the crown gear
11.41 is 3.73 devide 11 into 41 to get your ratio

if you got 2.77 on the rear end now, your looking at a lot to replace them with others. So why would you want to? why not get a rear end with everything the way you want it.
good luck.

i got a 3.73 posi from the wrecker then found it needs to be shimmed and stuff when installed. i didnt get the pinion gear so the gear set is no good to me and it would all cost about $250 to have installed in my rear end.