Overview
The Traxxas Ring Differential / Pinion Gear Differential (underdrive, machined) TRX8288 is a precision-engineered transmission upgrade component designed specifically for Traxxas TRX-4 scale crawler models. This machined differential assembly delivers enhanced performance and durability for serious RC enthusiasts who demand reliability and precision from their crawler platforms. Whether you're tackling challenging terrain, competing in organised RC events, or simply enjoying weekend bashers on the trail, this underdrive differential provides the torque characteristics and mechanical advantage needed to conquer obstacles with confidence.
Built to exacting Traxxas standards, this differential features a 37-tooth ring gear paired with a 13-tooth pinion gear configuration, creating an underdrive ratio that maximises torque delivery to the wheels whilst maintaining controlled speed characteristics. The machined construction ensures superior strength, precision tolerances, and longevity compared to standard alternatives. For RC car enthusiasts in the UK looking to optimise their TRX-4 crawler's drivetrain performance, this is an essential upgrade component that transforms how your vehicle negotiates technical terrain.
This tune-up component is compatible with an extensive range of Traxxas TRX-4 models, from the entry-level Sport variants through to the premium High Trail Edition crawlers and factory-assembled RTR (Ready to Run) configurations. Whether you own a TRX-4 Unassembled Chassis Kit, Nissan Pathfinder, Chevrolet K10 Cheyenne, Ford F-150 Ranger, Chevrolet K5 Blazer, Defender, or 2021 Ford Bronco edition, this differential upgrade seamlessly integrates into your existing setup to unlock new levels of crawling capability.
Key Features
- 37-tooth Ring Gear and 13-tooth Pinion Gear Configuration — The specific tooth count combination creates an underdrive ratio that prioritises maximum torque multiplication at the wheels, enabling your TRX-4 to power through steep inclines, rocky terrain, and technical obstacles with superior mechanical advantage and control compared to overdrive ratios.
- Machined Construction — Precision-machined from high-quality materials, this differential features tight tolerances and superior durability compared to injection-moulded alternatives, ensuring long-term reliability and consistent performance across countless trail sessions without wear or degradation.
- Underdrive Configuration — The underdrive ratio specification means you gain increased torque at the expense of top speed, making this ideal for technical crawling, rock-crawling competitions, and obstacle navigation where low-end power and control matter far more than outright velocity.
- Rear Differential Application — Specifically engineered as a rear differential component, this upgrade works in conjunction with your TRX-4's existing drivetrain to optimise power delivery to the rear axle, improving traction, stability and predictability during demanding off-road situations.
- Authentic Traxxas OEM Component — Manufactured to original equipment specifications by Traxxas, you can trust this part delivers the exact performance characteristics and quality standards established by the brand, with guaranteed compatibility and fitment across all specified TRX-4 models.
- Drop-in Replacement Design — This differential assembly is engineered as a direct replacement component for stock TRX-4 differentials, requiring no frame modifications, custom fabrication, or complex engineering work to install, making it accessible to RC enthusiasts of varying technical skill levels.
Technical Performance
The Traxxas TRX8288 differential represents a significant engineering upgrade for serious TRX-4 owners seeking to maximise their crawler's performance potential. The 37-tooth ring and 13-tooth pinion configuration delivers a 2.85:1 gear reduction ratio, a true underdrive specification that fundamentally transforms how your vehicle distributes power to the wheels. This ratio is specifically engineered for technical terrain mastery, providing the torque amplification necessary to climb steep slopes, power through deep sand, navigate rocky outcrops, and maintain controlled traction in challenging conditions. The machined construction ensures dimensional precision and material integrity that far exceeds injection-moulded alternatives, with tighter tolerances preventing the play and slop that can develop in standard differentials after repeated trail use. Built from premium-grade materials selected for their strength-to-weight ratio and resistance to impact damage, this differential withstands the demanding forces generated by full-size vehicle simulation in 1/10 scale crawling applications. The underdrive configuration means you sacrifice top-end speed for low-end torque multiplication—a deliberate engineering trade-off that makes perfect sense for TRX-4 owners focused on crawling capability rather than flat-track speed. This is a legitimate performance upgrade that serious RC crawler enthusiasts worldwide specify for competition-level trail work and demanding backcountry exploration with their scale models.
What's in the Box
- 37-tooth ring gear
- 13-tooth pinion gear
- Differential assembly components as specified by Traxxas
Frequently Asked Questions
- Is the Traxxas TRX8288 differential suitable for my TRX-4 model? — Yes, this differential is compatible with all current-generation Traxxas TRX-4 models, including the TRX-4 Unassembled Chassis Kit, TRX-4 Nissan Pathfinder SE-V6 3S RTR in all colours, TRX-4 Chevrolet K10 Cheyenne High Trail Edition variants, TRX-4 Ford F-150 Ranger XLT High Trail Edition, TRX-4 1972 Chevrolet K5 Blazer, TRX-4 1979 Chevy Blazer, TRX-4 Defender RTR in all colours, TRX-4 Sport models, and the 2021 Ford Bronco edition. Verify your specific model number against the compatibility list to confirm fitment before ordering.
- What does underdrive mean in the context of RC differentials? — An underdrive differential uses a smaller pinion gear in relation to the ring gear, multiplying torque output to the wheels at the cost of top speed. This configuration is ideal for crawling, technical terrain navigation, and situations where raw pulling power matters more than velocity. The 13-tooth pinion and 37-tooth ring gear in the TRX8288 create substantial torque multiplication perfect for TRX-4 owners prioritising obstacle-conquering ability over speed.
- How does the 37-tooth ring and 13-tooth pinion ratio improve my TRX-4's performance? — The 2.85:1 ratio this combination creates means your motor's output is amplified nearly three times over before reaching the wheels. This amplification translates directly into improved climbing ability, better traction in challenging terrain, enhanced obstacle-clearing capability, and superior control during technical descents. You sacrifice some top-end speed, but gain the low-end torque essential for genuine crawling work.
- Why choose machined construction over standard plastic differentials? — Machined metal differentials offer superior durability, tighter tolerances, resistance to impact damage, and longevity compared to injection-moulded plastic alternatives. The precision engineering of machined components ensures your differential maintains consistent performance across numerous trail sessions without the wear, play, or degradation that develops in lower-quality parts.
- Can I install the TRX8288 differential myself? — Yes, this is a drop-in replacement component designed for direct fitment to all compatible TRX-4 models. However, differential installation does require mechanical competence, basic tools, and familiarity with your vehicle's drivetrain assembly. If you're uncertain about installation procedures, consult your TRX-4 manual or contact experienced RC enthusiasts in your local community for guidance.
- Is this a genuine Traxxas part? — Absolutely. The TRX8288 is an official Traxxas OEM (original equipment manufacturer) component produced to exact factory specifications, ensuring guaranteed compatibility, authentic performance characteristics, and full reliability across all specified TRX-4 models.
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 Ring Differential / Pinion Gear Differential (underdrive, machined) TRX8288 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.
- Manufacturer: Traxxas
- Part Number: TRX8288
- EAN: 0020334828804
- Component Type: Differential Ring and Pinion Gear
- Differential Type: Rear Differential
- Ring Gear: 37-tooth
- Pinion Gear: 13-tooth
- Gear Ratio: 2.85:1 (underdrive)
- Configuration: Underdrive, Machined
- Construction Method: Machined
- Tune-Up Type: Transmission
- Compatible Vehicle Platform: Traxxas TRX-4
- Compatible Models: TRX82216-4-R6 (TRX-4 Unassembled Chassis Kit), TRX110056-4-RED (1/10 TRX4 Nissan Pathfinder SE-V6 3S RTR Red), TRX92056-4-BLK (TRX-4 Chevrolet K10 Cheyenne High Trail Black), TRX92056-4-SLVR (TRX-4 Chevrolet K10 Cheyenne High Trail Silver), TRX92056-4-BLUE (TRX-4 Chevrolet K10 Cheyenne High Trail Blue), TRX92046-4-BRWN (TRX-4 Ford F-150 Ranger XLT High Trail Brown), TRX92086-4-BLUE (TRX-4 1972 Chevrolet K5 Blazer High Trail Blue), TRX82276-4-BLK (TRX-4 1979 Chevy Blazer Black), TRX110056-4-SLVR (1/10 TRX4 Nissan Pathfinder SE-V6 3S RTR Silver), TRX92056-4-RED (TRX-4 Chevrolet K10 Cheyenne High Trail Red), TRX92056-4-COPR (TRX-4 Chevrolet K10 Cheyenne High Trail Copper), TRX92046-4-BLUE (TRX-4 Ford F-150 Ranger XLT High Trail Blue), TRX92086-4-RED (TRX-4 1972 Chevrolet K5 Blazer High Trail Red), TRX92046-4-BLK (TRX-4 Ford F-150 Ranger XLT High Trail Black), TRX82276-4-RED (TRX-4 1979 Chevy Blazer Red), TRX92076-4-ORNG (TRX-4 2021 Ford Bronco Orange), TRX92076-4-BLK (TRX-4 2021 Ford Bronco Black), TRX92076-4-RED (TRX-4 2021 Ford Bronco Red), TRX92076-4-WHT (TRX-4 2021 Ford Bronco White), TRX82256-4-RED (1/10 TRX-4 Defender Red), TRX82256-4-SLVR (1/10 TRX-4 Defender Silver), TRX82256-4-GRN (1/10 TRX-4 Defender Green), TRX82256-4-SAND (1/10 TRX-4 Defender Sand), TRX82044-4-BLUE (TRX-4 Sport Hightrail Blue), TRX82224-4-BLUE (TRX4 Sport Blue), TRX82234-4-ORNG (TRX-4 Sport Orange), TRX82224-4-GRAY (TRX4 Sport Gray), TRX88296-4-BLK (TRX-6 Mercedes-Benz G 63 AMG Black), TRX88296-4-SLVR (TRX-6 Mercedes-Benz G 63 AMG Silver), TRX88086-84-BLK (TRX-6 Ultimate RC Hauler Black)
- Application: Rear differential upgrade for TRX-4 scale crawlers
- What's Included: 37-tooth ring gear, 13-tooth pinion gear, differential assembly components
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