This is an optional Traxxas TRX-4M Tranmission Gear Set (Low Range).
Gear set, transmission, low range (crawl) (40.3:1 reduction ratio)/ pinion gear, 11-tooth
Give your TRX-4M™ unstoppable torque with this low-range transmission gear set. The gear set features an ultra-low 40.3:1 reduction ratio for maximum rock-climbing power. The set includes all transmission gears and a new 11-tooth motor pinion.
