I didn't have a clue. What I have is an understanding that axial no longer produces spur gears for the yeti 1/10 scale rich crawler. And so I have searched high and low with about 200+ dollars in battery, chargers etc with no spur gear that I can order with any confidence. Can anyone please recommended to me a spur gear that applies to the brushless axial vanguard 3150kv . If not I'm just gonna have to give up. The rig is a YETI 1/10 SCALE WITH THE BLUE AND WHITE cover (oops) paint and two figures inside the seats. Anyway the missing spur looking from the front of the rig is missing. The transmission pinion with 15T stamped on it is still there but not the larger wheel