The EX037S steel centre swing shaft is an aftermarket replacement intended for the Axial EXO chassis and supplied as a single set. Designed as a direct swap for the central swing assembly, this steel shaft provides increased centre drivetrain rigidity and improved wear resistance relative to common stock materials.
From a tuning perspective, a steel centre shaft modifies the mechanical feedback and stiffness around the centre differential and linkages. Expect a firmer drivetrain connection that reduces flex under heavy loads during demanding trail use or bashing, while understanding that greater stiffness will transfer more load into adjacent link mounts and bearings.
Installation notes for experienced technicians: remove the OEM shaft from the centre swing carrier, inspect bearing conditions and link pins, locate the steel shaft in the original mounting position, and verify free swing arm movement before final torque. Avoid over-torquing fasteners and confirm that neighbouring bearings rotate without binding after assembly.
Recommended maintenance: inspect shaft-to-bearing interfaces regularly for wear and corrosion, apply appropriate lubrication for steel contact points, and replace worn pins or bearings promptly to protect the shaft from accelerated wear.