From my research I know that the axles are the same, housing is same part number, bearings seals etc. are the same. My gear ratio is 3.6 and most of the older ones are 4.0 with a 9 tooth pinion instead of a 10 tooth pinion which is in mine. Will the ring gear work if i reshim the gears? The teeth are straight cut hypoid so I think they will. I just don't have the money to experiment. I am hoping someone else has already experienced this problem and can help.