I replaced my rear end.. the whole deal about three years ago. Anyways I counted the teeth and came up with 41. Is this the right rearend for my truck? My vin is 2GCEC19T91127577. I called about a locker because i busted the limited slip deal. Was told to count the teeth and 41 what it has. They say it should be like 31 or 35.. Something like that anyways. Its a 4x4 so i hope i didnt mess up all the 4x4 system.. Thanks for any and all help