Originally Posted by
SpeedySST
You know, this car has been nothing but a lesson in frustration. From having to take off the top deck just to change a pinion to finding out the middle stiffener only allows a maximum size pinion, I wish Id known about the silliness of the design.
You can change pinion through the slot in the bottom of the chassis. This stops you taking the top deck off that's what the slot is for.
What motor turn are you running? Are you using correct spur gear for your motor range?