Originally Posted by hypergpx4
the wheels move for a bit but then get stuck and i have to force it forward to get it working again
Fisrt check your drag brake. It is the long rod from the servo to the brake lever. Make sure there is not drag brake holding the car. Back off the small nut at the end of the rod.
If this does not help, back off the brake pads themselves. Most cars have a hole through the sides of the rear bulkhead so the brakes are able to be adjusted.<drivers side of the rear bulkhead>
If this still does not help, it could be in the clutch, or the one way on the rear shaft.
Remove the engine, and see if the chassis is now free to roll. If it is, then it is the clutch, or the clutch bell, or clutch bell bearings. While the clutch bell is off, check the flywheel nut after you remove the clutch. If this was not tightened all the way, they can back off.