Welcome to the stripped spur gear club.Well i got it today and put it in and about 10 minutes in i stripped the spur gear. So now i want a metal one if its availible.
I had a couple in my toolbox, guys at the track showed me how they can be slightly out of round.
So after you set mesh with paper gauge, then slowly rotate the spur a couple times around, looking to see if highs and lows are okay.
I bought a set of 3 for the quantity discount, but haven't needed them since getting the track lesson.
I'm running 80A ESC and motors between 3100-5700, depending on driving condition.
You may want to consider getting one of those 15-20 pinion gear sets to match the motor to the truck.