Overview
Slow your TRX-4M down to ultra-low crawling speeds with the Hot Racing Ultra Low-Range 68:1 Hardened Steel Internal Gear Set. Precision CNC-machined from #45 hardened steel, this internal transmission gear set replaces the stock internal gearing with an ultra-low 68:1 final drive ratio — perfect for technical scale crawling, ledge-by-ledge climbing, and slow-speed precision lines where stock gearing simply spins too fast.
This set serves as a replacement gear set for use with the Hot Racing TRXM38X transmission housing. The hardened steel construction not only enables ultra-low crawl speeds but also delivers dramatically improved wear resistance and fatigue life — essential for a transmission that's subjected to the high torque loads of low-RPM crawling.
Key Features
- Precision CNC-machined #45 hardened steel
- Ultra-low 68:1 internal transmission ratio
- Hardened gears for increased wear resistance
- Improved fatigue life under sustained torque loads
- Replacement gear set for Hot Racing TRXM38X transmission
Performance Benefits
- Slow, controlled crawl speeds for technical scale terrain
- Improved climbing ability on steep ledges and rock gardens
- More precise throttle modulation at low speeds
- Long service life — hardened gears resist stripping and pitting
Usage Notes
Designed as a replacement gear set for use inside the Hot Racing TRXM38X transmission housing. Apply diff grease during reassembly. Recommended for technical scale crawling where ultra-low crawl speeds are valuable.
Technical Specs
- Material: Precision CNC-machined #45 hardened steel
- Final Drive Ratio: 68:1 (ultra-low)
- Function: Internal transmission gear set
- Required Companion: Hot Racing TRXM38X transmission housing
What's Included
- One (1) internal transmission 68:1 gear set
Fitment
- Traxxas TRX-4M (1/18 scale crawler)
- Hot Racing TRXM38X transmission housing (required)
Summary
The Hot Racing Ultra Low-Range 68:1 Hardened Steel Internal Gear Set is the gear-down upgrade serious TRX-4M crawlers will love. Slower speeds, more torque, and bulletproof hardened-steel construction — exactly what technical scale crawling demands.
