When i bougth my 5.0 it came with two extra track-lok pumpkins with 3.55's and 3.73's. I want to use the 3.73's to upgrade on my 89 AOD (and then put those 3.27's in my 35th ), but i forgot which one was wich. Im wondering if there's a way to tell by opening up the differential cover. Like, could I count the teeth or something? Any help appreciated.