GPM Racing Stainless Steel #45 Portal Drive Output Spindle Gear 23T-2pcs Set for Traxxas 1/10 TRX4 (TRX4023TS)

Precision portal drive spindle for TRX4 applications

Supplied as a 2pcs set, this portal drive output spindle gear is designed for TRAXXAS TRX4 Trail Crawler vehicles and uses a 23T tooth profile to align with common pinion and spur combinations. Its function is to transmit rotational input from the portal assembly reliably to the wheel hubs while maintaining controlled engagement.

Manufactured from hardened steel #45 with a nutrified and hardening treatment, the spindle is specified to improve surface hardness and wear resistance during prolonged low-speed, high-load crawling. The spindle-style profile is finished to reduce backlash and narrow gear gap, improving torque handoff consistency under technical load cycles.

For installation, confirm proper seating in the portal housing and precise mesh with the mating gear teeth. Accurate shim selection and correct fastening torque are essential to preserve the minimized gap and to avoid uneven loading that can shorten component life.

Specifications

• Item: Portal Drive Output Spindle Gear 23T, 2pcs set
• Material: Hardened steel #45, nutrified and hardening process
• Model Number: TRX4023TS
• Compatibility: TRAXXAS TRX4 TRAIL CRAWLER

Precision machining and heat treatment target improved wear performance and consistent torque transfer for demanding TRX4 trail use. by GPM

What tolerance checks should I perform on arrival?

Measure axial runout and check tooth profile engagement by hand-rotating the assembly; any binding indicates a fitment issue that must be corrected before final assembly.

How does the nutrified process influence surface hardness?

The nutrified and hardening treatment increases surface carbon diffusion and hardness, improving resistance to tooth wear under repeated high-load contact.

Recommended shim practice for tight mesh?

Start with minimal shim thickness, check contact patch across teeth, and incrementally adjust until optimal engagement without binding is achieved.

What inspection schedule suits heavy crawler use?

Inspect gear faces, shims, and bearings after intense sessions and perform a detailed check every 10-20 runs depending on terrain to detect early wear. Write Product Review Please sign in your account before you can write any review. Sign In Close

Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.