ok everyone, thanks ahead of time for opinions and advice. i just purchased what i believe to be a first gen tmaxx with a new 2.5 motor. the previous owner could not figure out how to tune the new motor so he sold it to me. i got the motor tuned. however, i have to give it considerable throttle to get the tranny to engage and then it barely moves. when i let off the throttle it stalls the motor. anyone run into this before? i really dont know the trucks history so I'm kinda lost. also it only has a 2 channel radio so the reverse servo is inop. help please.