Thanks for the tip! Once I got the old switch out, it was obvious it had been used a little "harshly". Although I guess it was the original. 11,000 hours of flipping back and forth takes its' toll.
A good test for checking the direction switch is.
With the truck switched on & your sitting on the seat, select a direction, press & hold down deadman pedal, briefly press the accelerator pedal to release the parking brake & then see if the truck will try & creep away uncommanded.
After a few seconds flick the direction switch to the other direction & see if it will creep away in the other direction uncommanded.
Replaced steer motor... no help.
Replaced "forward reverse" switch assembly !!!! Problem solved.