Overview
The Traxxas Transmission, complete (high range (trail) gearing) (16.6:1 Reduction ratio) (includes Titan 87T motor) TRX9791 is a professionally assembled drivetrain upgrade designed for the TRX-4M series of 1/18 scale RC crawler trucks. This ready-to-install transmission assembly represents the perfect solution for RC enthusiasts in the UK who want to enhance their trail-running performance without the complexity of manual assembly. Whether you're navigating technical terrain with your Traxxas TRX-4M Ford Bronco, Land Rover Defender, Chevrolet K10, or Ford F-150 High Trail Truck, this complete transmission delivers the performance characteristics needed for consistent, reliable off-road driving. The high range (trail) gearing configuration makes this unit ideal for general driving and trail running, providing the optimal balance between speed and torque for recreational crawling and exploration.
This is not a bare transmission component—it comes fully assembled and ready to bolt in as a complete unit. Traxxas has engineered this assembly to eliminate the guesswork from transmission installation, removing the need for any gear mesh adjustment or parts alignment. This means you can upgrade your RC car UK quickly and efficiently, getting back to the trails in minutes rather than hours. The transmission is professionally pre-assembled with precision bearings and includes a fresh new Titan 87-turn motor, making it an all-in-one upgrade that takes the hassle out of drivetrain maintenance and customisation. For anyone looking to upgrade their TRX-4M trail truck with a quality brushless RC transmission system, this is a genuine Traxxas component backed by the manufacturer's reputation for reliability and performance.
The 16.6:1 reduction ratio is specifically calibrated for trail and general driving scenarios, offering sufficient torque for crawling whilst maintaining reasonable top-end speed for everyday RC car use. The inclusion of the Titan motor and mounting bracket means this is a comprehensive drivetrain solution that addresses both transmission and motor in one purchase, eliminating compatibility concerns and simplifying the upgrade process. Whether you're an experienced RC enthusiast or someone looking to enhance their trail truck's capability, this transmission assembly represents a straightforward path to improved performance.
Key Features
- Fully Assembled and Ready to Install — The transmission arrives professionally assembled with bearings and a fresh new Titan 87-turn motor pre-installed, meaning there is no gear mesh to adjust or parts to align; the assembly simply bolts in as a complete unit for quick and easy installation without technical complexity.
- High Range (Trail) Gearing Configuration — The 16.6:1 reduction ratio is specifically designed for trail driving and general off-road use, providing the optimal torque and speed balance for navigating technical terrain whilst maintaining usable top-end velocity for recreational crawling.
- Includes Titan 87T Motor — A genuine Traxxas Titan 87-turn brushless motor is included with the transmission, eliminating the need for a separate motor purchase and ensuring perfect compatibility with the transmission assembly.
- Mounting Bracket Included — The transmission comes with the necessary mounting bracket, ensuring proper fitment to your TRX-4M trail truck without requiring additional hardware sourcing.
- Compatible with TRX-4M Models — This transmission is specifically designed for and compatible with all Traxxas TRX-4M trail trucks, including Ford Bronco, Land Rover Defender, Chevrolet K10, Ford F-150, and TRX-4MT Monster Truck variants, making it a reliable upgrade for any TRX-4M owner.
- Compatible with Standard and Optional Speed Gears — The transmission is engineered to work with standard gears and the optional 9776X speed gear set, providing flexibility for future customisation and tuning; however, it is not compatible with 9776R crawl gears.
- Genuine Traxxas Engineering — This is an official Traxxas component manufactured to the same standards as the vehicles it upgrades, ensuring quality, reliability and performance consistency that OEM parts deliver.
Technical Performance
The Traxxas TRX9791 transmission assembly represents professional-grade engineering optimised for trail driving applications. The 16.6:1 reduction ratio is precisely calibrated to deliver strong crawling torque whilst maintaining adequate speed for general trail use, making this transmission the ideal choice for anyone running a TRX-4M trail truck who wants enhanced performance without sacrificing drivability. The included Titan 87-turn motor is a brushless unit that delivers responsive power delivery, smooth acceleration and reliable performance across varied terrain. The transmission's bearing surfaces are pre-installed during professional assembly, eliminating the need for buyers to perform gap measurements, mesh adjustments or alignment procedures—a significant advantage for those seeking a hassle-free upgrade. The machined components and precision engineering ensure smooth power transfer from motor to wheels, whilst the assembly's robust construction withstands the demands of technical trail driving. The inclusion of the mounting bracket ensures proper fitment and alignment, critical factors in transmission performance longevity. This is a complete drivetrain solution engineered for the specific needs of 1/18 scale TRX-4M crawlers, where trail performance, reliability and ease of installation are paramount considerations for UK RC enthusiasts.
What's in the Box
- Complete transmission assembly (fully assembled and ready to install)
- Titan 87-turn brushless motor
- Mounting bracket
- Bearings (pre-installed)
Frequently Asked Questions
- What TRX-4M models is this transmission compatible with? — This transmission is compatible with all Traxxas TRX-4M trail trucks including the Ford Bronco (available in Blue, Red, Orange, Black, White and Area 51 colour options), Land Rover Defender (available in Green, Light Blue, Pink, Silver, Tan and Black), Chevrolet K10 High Trail Truck (available in Blue, Red and Black), Ford F-150 High Trail Truck (available in Black and Brown), and both TRX-4MT Monster Truck variants (F150 and K10 in multiple colours). The transmission is specifically designed for these 1/18 scale models.
- Do I need to adjust the gear mesh when installing this transmission? — No, this is one of the key advantages of this assembly. The transmission arrives fully assembled with bearings pre-installed and the gear mesh pre-set, meaning you can simply bolt it in without any adjustment or alignment procedures. This makes installation straightforward and eliminates potential setup errors.
- What motor does this transmission include? — The transmission includes a genuine Traxxas Titan 87-turn brushless motor, which is specifically calibrated for use with this high range gearing configuration. The motor is pre-installed in the transmission assembly and ready to use.
- Is the mounting bracket included? — Yes, the mounting bracket required for fitment to your TRX-4M is included with this transmission assembly, ensuring you have everything needed for installation without additional parts sourcing.
- What is the gear ratio of this transmission? — The transmission features a 16.6:1 reduction ratio, which is specifically designed for high range (trail) gearing applications. This ratio provides the optimal balance between crawling torque and trail driving speed for general off-road use and recreational terrain navigation.
- Can I use this transmission with different gears? — The transmission is compatible with standard gears and the optional 9776X speed gear set, providing flexibility for future tuning and customisation. However, it is not compatible with 9776R crawl gears, so ensure you verify compatibility if you plan to use alternative gear sets.
- Is this suitable for beginners? — Yes, this is an excellent choice for RC enthusiasts at any experience level because the transmission arrives fully assembled and ready to install. There is no complex gear mesh adjustment or technical assembly required, making it ideal for those who want to upgrade their trail truck without undertaking involved technical work. The straightforward bolt-in installation makes this accessible even for relatively inexperienced RC builders.
- What is the difference between this TRX9791 and other TRX-4M transmission options? — The TRX9791 features high range (trail) gearing with a 16.6:1 reduction ratio, making it ideal for general trail driving and recreational use. Traxxas also offers the TRX9791X with speed gearing for faster driving and the TRX9791R with low range gearing for extreme crawling applications. The TRX9791 sits in the middle, providing the best balance for typical trail running and recreational off-road exploration.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the Traxxas Transmission, complete (high range (trail) gearing) (16.6:1 Reduction ratio) (includes Titan 87T motor) TRX9791 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
- Brand: Traxxas
- Model Number: TRX9791
- Product Type: Complete Transmission Assembly
- Scale: 1/18
- Transmission Type: Two-speed capable assembly (high range trail gearing)
- Gear Reduction Ratio: 16.6:1
- Gearing Configuration: High Range (Trail)
- Motor Included: Titan 87-turn brushless motor
- Motor Type: Brushless
- Motor Turns: 87T
- Assembly Status: Fully assembled, ready to install
- Bearings: Pre-installed
- Mounting Bracket: Included
- Gear Mesh: Pre-set, no adjustment required
- Compatible Vehicle Models: TRX-4M Ford Bronco (Blue, Red, Orange, Black, White, Area 51), TRX-4M Land Rover Defender (Green, Light Blue, Pink, Silver, Tan, Black), TRX-4M Chevrolet K10 High Trail Truck (Blue, Red, Black), TRX-4M Ford F-150 High Trail Truck (Blue, Black, Brown), TRX-4MT F150 Monster Truck (Black, Blue), TRX-4MT K10 Monster Truck (Red, Black)
- Compatible Gear Sets: Standard gears, optional 9776X speed gear set
- Incompatible Gear Sets: 9776R crawl gears
- EAN: 020334979100
- Category: Drivetrain Spares
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