Problem Fixed. L/H Brake assembly on top of the Drive motor was weak or faulty. looks like the brake stayed on. Worn down the friction disk into the metal drive gear. repalce the whole assembly. Works great

Thanks Rick I WILL look into that ASAP.

those trucks have a terrible problem with the drive motor flange bolts getting loose. they will eventually come out and the motor will spin loose and crush the motor controller. i am not saying that's what wrong with yours but there have been so many that i get nausiated when i hear about those trucks look very closely at both motors end bell and flange bolts