TRAXXAS TRX4 Portal Drive Spindle 23T Replacement - TRX4023TS by GPM  [TRX4023TS]

Aftermarket portal spindle for TRX4 trail rigs

This 2-piece portal drive output spindle gear is made for TRAXXAS TRX4 Trail Crawler setups and is specified at 23T to match common pinion and spur pairings. Its role is to carry rotational force through the portal assembly into the wheel hubs with consistent engagement.

Manufactured from hardened steel #45 with a nutrified hardening finish, the part is intended to stand up to the demands of low-speed, high-torque crawling. The spindle-style tooth profile is engineered to minimise backlash and reduce gear gap so torque is transferred cleanly during technical driving.

Check clearance and mesh when fitting this spindle into the portal housing. Proper shim adjustment and secure fastening of the spindle are important to preserve the minimized gap the design delivers and to avoid premature wear on the mating gears.

This GPM spindle gear serves as a direct aftermarket replacement or hop-up to recover or enhance torque transfer accuracy in TRX4 portal drives, particularly for serious trail and rock use.