This replacement kit contains a 33T bevel differential gear and a 12T pinion manufactured from 40CR steel, intended as a precision drivetrain spare for TRX4-series crawlers and compatible TRX6 platforms. The gears are sized to locate within front or rear gearbox housings and transmit torque through the differential assembly with consistent engagement.
Use this set to replace fatigued alloy or polymer gears or when a direct gearbox swap is required. The 40CR material selection balances fatigue resistance and toughness for typical scale crawling loads; examine bearing play and verify correct gear mesh to avoid accelerated wear.
Assembly notes for technicians: demount the gearbox cover, retain original shims and bearing positions, install bevel and pinion in original orientation, measure and set backlash, then confirm smooth rotation across the full range before final sealing. This component is intended for model use only.
8279?8279R
A precision 40CR steel bevel and pinion set produced as a direct-fit spare for TRX4 and TRX6 gearboxes, intended to improve durability and maintain consistent gear engagement during service operations. by GPM