TRAXXAS Unlimited Desert Racer Precision Front Drive Cup Hardened Steel #45 UDR039S by GPM  [UDR039S]

Precision front drive cup for TRAXXAS UDR

The GPM UDR039S front drive cup is a precision upgrade designed for the TRAXXAS Unlimited Desert Racer differential outputs. These cups locate on both front sides of the differential and transmit torque from the driveline to the axle interfaces, so accurate dimensions and hardened material are important to minimise wear and maintain concentricity under load.

Manufactured from hardened steel #45, each cup resists surface wear and cyclic fatigue better than softer factory parts. The supplied kit contains drive cup 2pcs and stainless steel cap head screw 2.5x12 2pcs for secure mounting, allowing a direct replacement when original cups show degradation.

Technical fit notes: install cups on the front differential outputs, ensure full seating and axial alignment, torque the 2.5x12 cap head screws to a controlled value to avoid compressive distortion, and verify endfloat and runout after initial bench testing and a short track session. Upgrading to hardened steel cups reduces interface wear and preserves driveline geometry during sustained heavy use.

Aimed at hobbyists seeking a durable, precisely machined replacement to restore driveline reliability and reduce wear on TRAXXAS Unlimited Desert Racer front outputs.