WOT it hits,has hard hitting lock-ups hammered out crank thrusts?

 

I think it'll break the input drum around the input shaft first, don't think it has any effect on crank thrust.
A yank uses damper springs as far as I know so something is really brutal in the tune.
Thats if it's a 4L65E and not a 4L80E.

 

yea 70e