Okay, this is what I found out. I need fine spline for the axles and course spline for the pinion gears. Toyota went to fine spline axles in 68 and moved to fine spline pinion in 78. Ee
I need to replace an EZ Locker that was installed in my 1973 FJ40. Should I replace with OEM or is there a good quality aftermarket setup of Spider gears, shaft and side gears?