thank you for clearing the axle situation up.i just rethreaded my 12mm x 1.5 semi stripped hubs to 14 mm x 1.5 and do not want to have to take those off.thanks for the info im in the market for the wavetrac.took it out of my imaginary kids college fund.lol.i got the chevy 350 and with 425 lbs tq imma need that in by next month.any answers you have on the diff ill digest.unbolt remove send ,get back and reinstall is the basic theory i suppose.you can use everything even driveshaft?and finally what is the difference inthe 2 wavetrac diff's needswing sells 1 costs more than the other?