Overview
Upgrade your Traxxas Mini Maxx's rear differential to a stronger, smoother, and more efficient gear set with the Hot Racing 39T/10T Hi-Torque Helical Rear Gear Set. Precision-machined from high-carbon steel with spiral-cut helical teeth, this stock-ratio (39T/10T) replacement gear set delivers a meaningful upgrade over the factory bevel gears in both strength and refinement.
Helical-cut gears engage progressively rather than all at once, resulting in quieter operation, smoother power transfer, and significantly higher torque-handling capacity than the stock straight-cut bevel gears. A direct replacement for Traxxas TRA10779.
Key Features
- High-carbon steel construction for exceptional strength
- Precision spiral-cut helical gear design
- Stock 39T/10T gear ratio — drop-in replacement
- Direct replacement for Traxxas TRA10779 rear gear set
- Quieter, smoother operation than stock bevel gears
Performance Benefits
- Stronger than the stock bevel gears — survives high-torque inputs
- Smoother, quieter power delivery through the rear diff
- More torque transmittable through fewer-tooth ratios
- Long-lasting durability under brushless punishment
Usage Notes
Installation following the kit manual is required. Pinion and ring gears must be replaced as a set. Apply medium thread-lock (blue) on screws threading into metal. Hot Racing SPL10G05 high-temp grease is recommended for the diff gear. Use silicone diff fluid inside the gear diff.
Technical Specs
- Material: High-carbon steel
- Tooth Profile: Spiral-cut helical
- Ring Gear: 39 tooth
- Pinion Gear: 10 tooth
- Ratio: Stock Mini Maxx ratio
- Replaces: Traxxas TRA10779
What's Included
- One (1) 39-tooth spiral-cut diff ring gear
- One (1) 10-tooth spiral-cut pinion gear
Fitment
- Traxxas Mini Maxx 1/10 monster truck
- Replaces TRA10779 rear gear set
Summary
The Hot Racing 39T/10T Hi-Torque Helical Rear Gear Set is a must-have drivetrain upgrade for any Mini Maxx driver running brushless power or hard bashing setups. Stronger, smoother, and quieter than stock — replace as a set and run with total confidence.
