axle splines

[454HO]

Splines for the 8.5" rear changed from 28 to 30 in '88 or '89 depending on the vehicle model. And from the research I did a while back, the 30 spline axle shafts for the '88-'98 truck are a little longer (like 1/2") than the 28 spline shafts on earlier years.

I did not find an off-the-shelf direct fit axle shaft to convert from 28 to 30 spline carrier. Would have to have some custom made. Not a big deal, but maybe $100 or so more than direct fits would cost.