ok so i have somehow worn the bearing race surface of my rear axles to the point where i cant put new bearings on because they are undersize. so long story short, i need new axles! not cheap from Toyota so id rather go aftermarket which are slightly cheaper and supposedly better chrome molly. ive been thinking Nitro shafts, the don't however make/list a set for the 90 series but do list for 120 and 150 series. both there listings state that they are 30 spline shafts which i know is the same as what i have but i need to know if anyone knows if i can use the 120 or 150 series shafts in my diff, and what are the differences if any. i would hope that they'd be mostly the same as the 90....