6-Speed Transmission with High/Low Range for CISON V8 Engine Model Kits V8-4406 Speed Transmission with High Low Range for CISON V8 Engine Model Kits Upgrade Your RC Build Built for the CISON V8 Engine Take your RC car to the next level with this high performance transmission system designed to work perfectly with the CISON V8 engine. Whether you enjoy rock crawling, racing, or custom builds, this gearbox gives you more control, more speed options, and easier installation. Why Youll Love It: Plug and Play with the CISON V8:

6-Speed Transmission with High/Low Range for CISON V8 Engine Model Kits

Upgrade Your RC Build — Built for the CISON V8 Engine

Take your RC car to the next level with this high-performance transmission system designed to work perfectly with the CISON V8 engine. Whether you enjoy rock crawling, racing, or custom builds, this gearbox gives you more control, more speed options, and easier installation.

Why You’ll Love It:

Plug-and-Play with the CISON V8:
Just connect it to your engine’s flywheel—no modifications or extra parts needed.

6 Gears to Play With (3 Forward × High/Low Range):
That means 6 forward speeds in total. Whether you're climbing hills or speeding on flat ground, this gearbox adjusts to your driving style.

Built-in Reverse + Braking:
Go backward without stopping. It even comes with a brake system built in, so no need to install a separate brake for gas-powered builds.

Strong Multi-Clutch Setup:
Every gear uses steel clutch plates to make shifting smoother and reduce wear over time.

Easy Servo Mounting:
It includes space for mounting a servo motor—no need to figure out custom placement.

Default Disengaged Clutch Design:
This is safer and easier to use, especially in emergency situations or tricky terrain.

Shift Without Losing Power:
You can switch gears smoothly without cutting engine power—just like a pro RC setup.

What Makes This Gearbox Special:

Shift gears without cutting throttle — smooth and fast

Built for serious climbing and high-speed action

Compact but powerful — with room to grow

Can even do hard launches (though not recommended too often)

A Few Things to Note:

It’s a dry clutch. Don’t use oil or it might slip.

Slightly longer than traditional gearboxes (about 15% more)

Complex system = a bit more care needed for maintenance

Why We Didn’t Use a Traditional Car Clutch:

Traditional clutches would put too much pressure on the CISON V8’s crankshaft due to its small size. Our design protects your engine while still giving you fast, powerful performance.

Specifications:

.Material: Metal
.Power Shift Transmission Gear: 1-23-N-R (three forward gears, one neutral gear, one reverse gear)
.Transfer Case Gear: high speed/low speed (high and low speed switching gear)
.Power Combination: 6 speeds and 8 gears
.Power Shift Transmission Main Speed Ratio: 1-3.27 /2-1.85 /3-1.08 /R-3.23
.Transfer Case Gear Ratio: high speed 2.2 / low speed 9
.Actual Output Speed Ratio = power shift transmission main speed ratio * transfer case gear ratio
.High Speed Transfer Case Speed Ratio: 1-7.19 /2-4.07 /3-2.37 /R-7.1
.Low Speed Transfer Case Speed Ratio: 1-29.43 /2-16.65 /3-9.72 /R-29.07
.Output Shaft Specification: 5mm
.Applicable engine: CISON V8 engine model
.Product Weight: 1000g
.Package Weight: 1200g
.Product Dimensions: 13.8(power shift transmission 9.3 + transfer case 4.5) x 10 x 8cm
.Package Dimensions: 16 x 12 x 10cm
.Packing: Box
.Ages: 16+

FAQ

Q: Does the gearbox come with a clutch and a coupler to connect to the engine flywheel? I can't see any clutch in the photos.

A: Yes, the gearbox comes with 4 internal clutches and a coupler that connects directly to the flywheel of the CISON V8 engine.
The clutch system is built inside the transmission housing, so it’s not visible from the outside in most pictures. You can spot the annotations in the images showing the shift mechanism and brake structure. Additionally, it supports optional customization for L4 engines with a special flywheel housing.

Q: Will there be a RWD (Rear-Wheel Drive) version? I’m building a 1972 Chevy SS and don’t want AWD.

A: Currently, this gearbox is designed as an AWD (All-Wheel Drive) unit and does not have a transmission-disconnection function. However, if you only connect one drive shaft (to the rear), you can effectively use it as RWD.

You can also remove the transfer case if it's just for display or if you don’t need 4WD functionality. Just note that this gearbox is only compatible with the CISON V8 engine — it is not compatible with the TOYAN V8, due to differences in the output shaft and flywheel housing.

This setup works well for display builds or low-speed cruisers like your Chevelle SS proje

Q:Why does this item take longer to ship?

This is a precision micro-scale 6-speed transmission for the CISON V8 engine.
Its extremely small size makes machining, assembly, and adjustment highly demanding, with no mass-production shortcuts available.

Each unit must be manually assembled, fine-tuned, and fully tested for shifting performance and mechanical reliability.
During testing, parts that fail to meet strict standards are discarded rather than reused, often requiring parts to be remade and assembly to restart.

Due to the high machining difficulty, repeated testing, and material rejection during quality control,
production takes approximately 2 months before shipment.