OK , I actually just bought this truck used. It's been sitting a while. Bought it from my LHS , and he got it running and checked it out. When he started it the radio didnt have batteries so he was throtteling by hand just to rev it. when he was holding it off the ground it was shifting , now even when holding it up , it doesn't shift with the radio , not sure if that makes sense. It was also releasing a whitish sludge from the exaust when i was driving it today for the 1st time. Just trying to give you every ounce of info to get to the bottom of this , thanks for your time......JK