TRAXXAS TRX4 TRAIL CRAWLER Front Main Shaft assembly by GPM TRX4037FX  [TRX4037FX]

Front main shaft for TRX4

This GPM TRX4037FX front main shaft is an RC-scale replacement designed for the TRAXXAS TRX4 TRAIL CRAWLER platform, combining a steel joint with an aluminum body to handle drive transfer from the motor to the chassis.

The assembly uses a CVD head on the middle side to allow a larger rotation angle with reduced friction where the center gearbox sits close to the main shaft, while the cross head is positioned toward the front gearbox. This orientation supports smoother driveline rotation under typical trail crawling loads.

Included mounting hardware and O-rings are provided for basic installation; the part is intended as a direct-service spare or hop-up for tuning driveline feel and durability on scale trail setups.

Use this assembly when replacing worn front main shaft components or when tuning driveline response for scale trail crawling on TRX4 chassis, following standard maintenance checks for fit and lubrication.