and one of the motors on the gearbox has more resistance than the other making my dog walk round in circles.... is spins up to speed slower than the other and you can feel it by hand that its stiffer, I tried different TX, RX RX18 etc but its the motor and also one of the drive gears spins a tad wonky... all in all spent a few hours on something that seems to be an expensive chore

I had plastic sprockets on metal tracks with white metal gearboxes that work a hell of a lot better than these hop ups? and they have never failed on me in over two years!

anyway little rant over, is there a way I can free up this motor? the rest I can sort out...