Originally Posted by radar
I hammered (plastic deadblow) the gear train off the output shaft to see what was going on in there.

It looks like the aluminum splines on the front planetary gearset were starting to twist? I’m thinking this might have happened when the power going to the broken yoke/off center driveshaft turned into a shock load on the output shaft- more like evidence of the failure than a possible cause?

This is what I call a wear item in my race trans. When they won't slide off it's time for a new one. Look at it from the rear. Are the splines helical? Never had one completely fail. Current one has about 200 passes on it and still slides fine. I keep thinking about upgrading but since it hasn't failed I'll stick with it. I've only replaced one in 550 passes.
Doug