Traxxas 9791R Transmission Complete Low Range (Crawl)Gearing with Titan 87T motor
'Transmission complete (low range (crawl) gearing) (40.3:1 reduction ratio) (includes Titan� 87T 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. Traxxas Pro Built� transmissions come professionally assembled with bearings and a fresh new Titan� 180 87-turn motor. There's no gear mesh to adjust or parts to align. The assembly bolts in as a complete unit for quick and easy installation.'