Going to rebuild my 722.315
Take a look at my tranny rebuild starting on page 10 shows the tail section being put back together ..It is not hard to take all this apart
You said earlier that the trans went out with a bang..Shifting it into park while it is rolling at any speed would put a tremendous strain on those splines..
The parking pawl is about 1/2 inch thick..same as the parking gear..The shaft that the pawl pivots on is pretty heavy too..The splines on the output shaft are pretty thin..
A sudden stop even at 3 mph could easily shear those splines off..