GPM Racing Hardened Steel #45 Motor Gear 27T - 2pcs Set for Traxxas 1/7 Unlimited Desert Racer-85076-4 (UDR027TS)

Technical pinion for TRAXXAS Unlimited Desert Racer motor

This precision pinion targets the TRAXXAS Unlimited Desert Racer drivetrain and is manufactured from hardened steel #45 to increase resistance to abrasive wear compared with softer gear materials.

Mounting position: pinion area. The 27T gear is supplied as a like-for-like replacement; installers should relocate the motor mount to the corresponding positioning hole referenced in the listing to maintain optimal gear engagement and backlash control.

Supplied items include the motor gear and a 4×4 set screw for shaft retention, facilitating straightforward replacement while maintaining concentricity with the spur interface.

Use this component during drivetrain tuning to reduce premature tooth wear and to preserve bearing life; recheck gear mesh under rotation and confirm motor mount alignment during final assembly to avoid load concentration on gear teeth.

What inspection steps ensure correct mesh?

Set the motor in the designated mounting hole, adjust mesh to a minimal running clearance, rotate the drivetrain slowly to verify even contact, then secure the motor and retest.

Are there shaft preparation tips?

Ensure the motor shaft is clean and free of burrs, check the set screw thread engagement, and consider applying a light medium-strength thread locker if frequent vibration is expected.

How does material choice affect service life?

Hardened steel #45 improves abrasive wear resistance compared with non-hardened alloys, extending service life under higher torque and frequent tuning cycles. 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.