I started driving my slash today when I heard a grinding noise coming from the truck. So i doubled checked the gear mesh and it looked fine. So then i pulled the motor out and spun the wheels by hand and there was a little noise and resistance but nothing terrible. While i was spinning one of the wheels i looked at the spur gear and it was slightly wobbling while it was spinning. I messed with the spur gear a little and there was more play in it then i remembered. I havent taken the transmission apart yet but im confused as to what the noise is.
One other thing, when i pulled the axles out of the rear bearing carriers the blue rings in the wheels bearings that keep dirt out came off on both the inside bearings and there is quite a bit of dirt in them. Should i try and clean them or replace them?