To the best of my knowledge I have never had a wide track axle. I have a model 20 rear end that has a crack in the center section where a ring gear bolt came loose and it also has worn out spring perches. I have a few more housings and was thinking about taking all of the gear's and axle's out of the bad housing and putting them in one of the good housing's. What I'm asking is how much difference is there in a regular housing and a wide track housing?