Those two models mentioned above, 2310 and 2311 have a different carrier option. The outside diameter of the side gears are different. from 87-93 (2310)had different carriers than those from 1993-05 (2311). I ran into this issue with mine, bought the 2310, didn't fit, returned to richmond gear, they sent me the 2311, even though they had all the info on my axle they still sent me the wrong one the first time. I would call Tech support at richmond to make sure you get the right one. Cause its a PITA to get it all opened up just to have to put it all back together cause you have the wrong part. I'm guessing you need the 2310.