RE: A question for the PRO'S
no problems at all but i check everything out usually every few runs, also check for rocks and pebbles in the gears every run or so. turn the gears with your finger and see if there is any serious binding(make sure truck is not running). Put the gears together and run a piece of paper between them while leaving the motor screw on the bottom a little loose. tighten the screws and this should be good, also check that the motor looks straight and square after you tighten it and listen when you first run the truck, you should hear very little meshing of the gears.