It's not the b\a 10 trans I have one of those for my 89 an I know it's not that. I put 35s up on my truck an I'm just not liking the drive so was trying to see if I axle swapped with my other. If I could get a better ratio but I have 3.73 right now an looking for 4.10 or 4.88. I check what axle is under it tomrow it's a soon to be project truck if I ever get time so haven't really touched it since bought