Bill
Mine shifts better is you double clutch & dont rev it up to far.
The govener on this truck must not be working.
I had it up to 65 MPH 1 time - nothing behind just the tractor.
Most of the grain trucks have a 2 speed rear end & these work reel good with a 4 or 5 speed trans.
I know a fellow that has a GMC with a 8.2 Detroit with a 16 speed road ranger in it.
Start in low range shift 5 times go to medium 5 more times than to high range & 5 more.
Nice truck but you dont ever get your hand off the shift knob, He wants to sell it to me.