They can shift smooth as silk. No clunk or whip lash between gears. If everything working nice a strong down shift (passing WOT) can be noticed and then a hard shift lock-up is noticed. You'll be rocking and moving out at 42.36 MPH on to sub sonic 57.2 MPH maybe more down hill.
Bet YA didn't know HumV was NASA's in the running for a launch vehicle, CAMO