Wheel hubs, 12mm hex (steel), extreme heavy duty (4)/ 2x9.8mm pin (4) (for use with #9080 upgrade kit and 6mm axles)

Shock tower, front, extreme heavy duty, black (for use with #9080 upgrade kit)

Differential output yoke assembly, extreme heavy duty (2) (left or right, front or rear) (assembled with external-splined half shaft) (for use with #9080 upgrade kit)

Stub axle assembly, front, outer, extreme heavy duty (1) (left or right) (assembled with internal-splined half shaft) (for use with #9080 upgrade kit)

Suspension pin set, extreme heavy duty, complete (front and rear) (3x52mm (4), 3x32mm (2), 3x40mm (2)) (for use with #9080 upgrade kit)

Carriers, stub axle, rear, extreme heavy duty, black (left & right)/ 3x41mm hinge pins (2)/ 3x20mm BCS (2) (for use with #9080 upgrade kit)

Stub axle assembly, rear, outer, extreme heavy duty (1) (left or right) (assembled with internal-splined half shaft) (for use with #9080 upgrade kit)

Boost the top end of your TRX-4M™ with this Speed transmission. The transmission features a high 9.7:1 reduction ratio for maximum speed. Traxxas Pro Built®transmissions come professionally assembled with bearings and a fresh new Titan® 180 87-turn motor.

Give your TRX-4M™ unstoppable torque with this low-range transmission. The transmission features an ultra-low 40.3:1 reduction ratio for maximum rock-climbing power.