Need repair manual for Dynasty IT Car (2001), expensive noise in gearbox.

[tanis61]

we have a 2006 it car that is making noises too. we do have a manual that we would be glad to send you. it shows the car having a dc motor and 1440 controller ours was upgraded to an ac motor and a 1238 controller. we have replaced the gearbox, encoder, had the engine rebuilt and it still won't run when you put it so wheels off the ground it turns with no noise but when pedal pushed the speed doesn't change and when you put it on the ground it grinds, squeels, and then the motor heats up. we need someone who knows 1238 controllers to check this one and we bought the gearbox from the guy at dynasty but the thing is this car only had 200 miles on it it's like new.