TRX4M Centre Driveshafts Upgrade Front and Rear Medium Carbon Steel TRX4M037S by GPM  [TRX4M037S]

Centre front and rear shafts overview

Replacement front and rear centre driveshafts for 1/18 TRX4M platforms, supplied as aftermarket components rather than OEM units. Medium carbon steel construction helps manage greater torque and the more extreme transmission angles often used on compact 4WD crawlers and trail machines.

Use case and compatibility: these shafts channel power from the transfer assembly to the front and rear differentials, so they are critical to drivetrain robustness and responsiveness during heavy articulation or when running heavier electronics. Swap them in when stock shafts begin to show wear or when you upgrade to stronger motors.

Fitting advice: the kit includes the small M3 screw pins for mounting and requires basic disassembly of the transfer output area; common hex drivers will complete the job. Ensure spline and coupling fit on your TRX4M transfer case before final torqueing to avoid binding at extended articulation angles.

A sensible centre driveline upgrade for hobbyists aiming to boost reliability on TRX4M 1/18 4WD builds while keeping fitment straightforward.