Metal 3-Speed Gearbox with Reverse Neutral Forward Kit for TOYAN V8 Engine RC Car Modification
Hero Section: Total Control for Your Custom Build
A powerful engine is nothing without control. If you are building a custom gasoline-powered RC car—especially one powered by a beast like the TOYAN V8—you need more than just "stop" and "go." You need the tactical precision of a real transmission. This Modified Metal Gearbox Kit bridges the gap between raw engine power and drivable performance, giving you the ability to shift between Forward, Neutral, and Reverse. It transforms a static engine display into a fully maneuverable, dynamic vehicle.
Why Choose This Metal Gearbox Kit?
- True F-N-R Shifting: Most basic RC setups lack a reverse gear or a true neutral idle. This gearbox introduces a mechanical 3-position shift (Forward, Neutral, Reverse), allowing you to idle your engine without the wheels spinning and back out of tight spots with ease.
- All-Metal Durability: Plastic gears strip under the high torque of gasoline engines. This unit is constructed entirely from metal, ensuring it can withstand the stress and heat generated by engines like the TOYAN FS-V800WGPC.
- Customizable Linkage: The lever control system is designed for the DIYer. The input and output lengths are adjustable, allowing you to tailor the linkage to fit your specific chassis layout and servo setup.
- High-Torque Design: By utilizing a reduction ratio, this gearbox multiplies the engine's torque, ensuring your heavy scale model has the power to climb and accelerate smoothly.
Technical Highlights: Mechanics Explained
- Gear Ratios & Torque: The gearbox features distinct ratios for different needs. The deceleration ratios (approx 1:2 and 1:11) allow for high-torque output, essential for moving heavy metal RC builds from a standstill.
- Forward Ratio: 26/59
- Reverse Ratio: 19/14/59 (utilizes an idler gear to reverse direction)
- Universal Shaft Fitment: Equipped with standard 5mm input and output shafts, it is compatible with a wide range of couplers, pulleys, and drive shafts used in the 1/8 and 1/5 scale RC world.
- Compact Engineering: Despite its complexity, the box measures just 40x40x56mm, making it compact enough to fit into tight engine bays without sacrificing structural integrity.
Specifications
- Material: Full Metal Construction
- Gears: Forward / Neutral / Reverse
- Shaft Diameter: 5mm (Input and Output)
- Shaft Length: 60mm
- Total Length (with shaft): 70mm
- Box Dimensions: 40 x 40 x 56mm
- Overall Dimensions (with Pull Rod): 86 x 40mm
- Weight: 270g
- Gear Ratios: Forward (26/59), Reverse (19/14/59)
- Compatibility: DIY Gasoline RC Cars, TOYAN FS-V800WGPC, and similar engines.
Usage Scenario: The Scale Crawler
You have built a custom 1/8 scale off-road truck powered by a Toyan L4 or V8. You fire up the engine. Thanks to the Neutral gear, the engine idles smoothly while the truck sits still. You blip the throttle to show off the sound. When ready, you use your transmitter to actuate a servo, shifting the lever into Forward. The truck rolls out. You approach a rock obstacle but get stuck. Instead of the "walk of shame" to pick it up, you shift into Reverse, back up, and take a better line. This is the realism this gearbox delivers.
Important Tips from the Workshop
- Clutch Required: This is a transmission gearbox, not a centrifugal clutch. It must be used in conjunction with a clutch system (usually mounted on the engine flywheel) to allow the engine to idle without stalling when the vehicle stops.
- Servo Selection: Shifting gears under load requires force. We recommend using a high-torque metal gear servo to operate the shifting lever for reliable gear changes.
- Lubrication: The gearbox arrives assembled, but for longevity, we recommend applying high-quality molybdenum grease to the internal gears periodically.
- No Brakes: This unit does not have an internal braking mechanism. Braking must be handled by your RC car's wheel brake system or disc brakes on the driveshaft.
Customer Support
Integrating a transmission into a custom build can be complex. If you need help with shaft coupling sizes, servo linkage ideas, or mounting advice, our technical team is here to assist. Contact us at service@helloworld7.com.
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