Well, I ordered the nodular(not Yukon)489 case w/billet caps set up w/a 35 spline spool and big yoke so time will tell people and he only has a hand full left and then off to the track...........
The doctor diff one is the best, every thing about it makes the stock one look like tin foil, I had em next to each other here in my shop. Add in the better material and it is a no brain choice. It will not flex nearly as much, no way no how so now your pinion shaft is the weak link but being better supported even it should last longer. If it dont flex the teeth stay engaged properly down deep instead of moving out to the tip so the teeth will last longer.
