INJORA CNC Aluminum Transmission Upgrade for 1/18 RC Crawler TRX4M – 370/2204 Motors

Upgrade your INJORA 1/18 RC crawler with a precision CNC aluminum transmission

Designed for reliability on tight trails and steep climbs, the INJORA CNC Aluminum Transmission offers a sturdy chassis that you can feel in action. The thicker, CNC-machined housing provides a robust foundation, while the sleek black finish adds a bold touch to your crawler’s undercarriage. Built to accommodate a taller profile, it makes room for 370 motors without sacrificing clearance, so you can push your rig into more demanding configurations with confidence.

This transmission is more than a metal shell—it’s a thoughtfully engineered upgrade that aims to deliver consistent gear engagement and smoother power transfer. In real-world use, you might notice steadier low-end torque delivery during crawling sequences and a more controlled ascent on irregular terrain. While outcomes can vary with setup, many drivers appreciate the way the gears maintain alignment under load, helping you preserve speed through technical sections and maintain momentum on rocky passages.

Smart upgrade choices for your crawler

• Enhanced durability: CNC aluminum construction stands up to rough trails and repeated shifting.
• Improved aesthetics: A black housing adds style while coordinating with other aluminum components.

• Freedom to pair with larger motors: Taller housing fits 370 motors for expanded torque options.
• Precise gear meshing: The 24.4:1 metal gears with underdrive (32%) contribute to balanced power distribution.

Key specs and compatibility

• Note: Suitable only for INJORA 370 motors and 2204 brushless motors. Not suitable for smaller motors such as 1721 and 180.
• Includes ball bearings for smoother operation and longevity.
• Underdrive gearing at 32% provides a different torque-to-speed feel compared to standard setups.
• Compatible with TRX4M transmission gears, enabling easier upgrades within the ecosystem.

What you get

• CNC aluminum transmission housing
• 24.4:1 metal gears with underdrive 32%
• Ball bearings included
• Compatibility with TRX4M gear sets for straightforward integration

If you’re planning a mid-season trail build or simply want a cleaner, more capable drivetrain, this INJORA transmission upgrade offers a practical path forward. It’s about consistency, ease of install, and giving your 1/18 crawler a chance to tackle new terrain with added confidence.