The Pro Built® high range (standard) transmission comes 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.

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.