Tranny makes grinding noises
Vehicle makes grinding noises
1 Stripped transmission gears
Replace damaged gears.
2 Stripped or worn spur gear
Replace the spur gear before continuing to run the model.
3 Differential damage (Maxx/Revo trucks)
Remove and inspect the front or rear differenital to check the ring and pinion gear for damage. Replace the necessary parts using your vehicle's exploded view drawings for reference.