TRAXXAS TRX4 Trail Crawler Portal Drive Spindle Gear 23T by GPM TRX4023TS  [TRX4023TS]

Portal drive spindle gear for TRX4

This is an RC-scale portal drive output spindle gear designed for the TRAXXAS TRX4 Trail Crawler platform, supplied as a 2pcs set. Its primary role is to transmit rotational energy from the motor through the portal drive assembly to the wheels, and the part is specified as 23T to match compatible gearbox pinion and spur ratios.

The component is produced in hardened steel #45 and undergoes a nutrified and hardening process to increase wear resistance under repeated low-speed, high-load crawling conditions. The spindle-style gear profile is engineered to minimize backlash and gear gap so torque transfer across the portal outputs remains consistent during technical trail driving.

When evaluating this part for a TRX4 build or upgrade, inspect fitment at the portal housing and verify mesh with the mating gear teeth. Proper shim adjustment and secure fastening of the output spindle are important to maintain the minimized gap the design provides and to avoid premature wear.

This GPM spindle gear is a direct aftermarket-style replacement or hop-up part intended to restore or improve torque transfer fidelity in TRX4 portal drives, especially for trail crawling setups where reduced gear gap is beneficial.