TRAXXAS TRX4 TRAIL CRAWLER Steel 10T Pinion Gear by GPM TRX4010T  [TRX4010T]

Steel 10T pinion for TRX4

This 2pcs steel 10T pinion set is an RC-scale accessory produced for TRAXXAS TRX4 TRAIL CRAWLER applications and labeled GPM TRX4010T. Manufactured from hardened steel #45, the gears are specified for motors with a 3.175mm centre bore and 0.8mm tooth spacing, designed to deliver consistent meshing in low-speed, high-torque crawling conditions.

Use and fitment: the pinions are intended to mate with spur gears using a 32 pitch profile and a 10-tooth count, so confirm your spur and motor shaft dimensions before swapping. The set includes the small 3×3 screw shaft used to secure the pinion to the motor shaft, allowing direct replacement without additional hardware in many TRX4 motor setups.

Tuning role: changing pinion tooth count alters final drive ratio, affecting low-speed torque and top speed on trail courses. For crawling, a lower tooth count on the pinion increases torque at the wheels; ensure proper mesh and verify motor clearance to avoid premature wear.

Practical notes: inspect the motor shaft for burrs, verify the 3.175mm centre bore fit, and tighten the fixing screw firmly but without over-torquing to protect the shaft and the gear teeth. Periodic check of gear mesh and the securing screw is recommended after initial runs.