Traxxas Ring Gear Differential Pinion Gear Machined TRX8279R

Overview

The Traxxas Ring gear differential/ pinion gear differential TRX8279R (machined) is a precision-engineered differential component designed for serious RC enthusiasts and competitive racers who demand the very best from their RC car UK setups. This machined differential assembly represents Traxxas's commitment to quality and performance, offering the reliable drivetrain components that have made Traxxas one of the most respected names in ready to run RC vehicles and aftermarket upgrades. Whether you're upgrading an existing Traxxas model or building a custom RC setup, this differential gear set provides the exact specifications needed to optimise your vehicle's handling and performance characteristics.

Differential gearsets are absolutely critical to RC car performance, as they allow the drive wheels to rotate at different speeds during cornering whilst still receiving power from the motor. The TRX8279R delivers the precision engineering that experienced RC builders expect, with machined construction that ensures durability and consistent performance through hundreds of hours of racing and bashing. This is the kind of component that separates weekend bashers from serious competitors, and it's the choice of RC enthusiasts across the UK who understand that transmission tuning can make the difference between a good RC car and a great one.

If you're searching for quality RC car spares in the UK or looking to upgrade your transmission components for better performance, the Traxxas TRX8279R is engineered to deliver exactly what you need. Traxxas has built its reputation on producing durable, high-performance RC vehicles and replacement parts, and this differential assembly is no exception.

Key Features

• 37-tooth ring gear — The larger ring gear ratio in this differential set is designed to work with specific pinion configurations to deliver optimal torque delivery and acceleration characteristics for your RC vehicle, ensuring you get the right gearing balance for your driving style and terrain.
• 13-tooth pinion gear — This precision-machined pinion gear works in conjunction with the ring gear to create a gear ratio that determines your vehicle's top speed and acceleration profile, allowing you to fine-tune your RC car's performance characteristics.
• Machined construction — Unlike injection-moulded alternatives, the machined design of this differential assembly provides superior durability, reduced wear, and more consistent performance over extended use, which is why serious RC racers prefer machined components for their critical drivetrain parts.
• OEM Traxxas component — This is an official Traxxas spare part, ensuring perfect fitment and compatibility with your Traxxas RC vehicle, and guaranteeing that you're getting genuine components with Traxxas quality standards and support behind them.
• Differential assembly complete — This is the full ring and pinion gear set for rear differentials, meaning you're getting both critical components needed to upgrade or replace your existing differential in one package, saving you time and ensuring compatible gearing.
• Transmission upgrade component — Perfect for tuning your RC car's drivetrain, whether you're upgrading from stock components, replacing worn parts, or experimenting with different gear ratios to optimise performance for specific track conditions or driving styles.

Technical Performance

The TRX8279R represents Traxxas's engineering excellence in drivetrain components. The 37-tooth ring gear paired with the 13-tooth pinion gear creates a specific gear ratio that directly affects how your RC car accelerates and reaches top speed. In differential design, the ring gear is the larger driven gear that receives rotational force from the pinion gear (the smaller driving gear connected to the motor via the driveshaft), and the ratio between them determines your overall transmission characteristics. A gear ratio is calculated by dividing the number of teeth on the ring gear by the number of teeth on the pinion gear — in this case, 37÷13 gives a ratio of approximately 2.85:1, which is a moderate ratio suitable for balanced acceleration and speed performance. The machined construction ensures that these gears are precisely manufactured to exacting tolerances, resulting in smoother engagement, less play, and more efficient power transfer from your brushless or brushed motor to the wheels. Traxxas's commitment to quality means these gears are made from hardened steel or suitable alloy materials that can withstand the stresses of racing and aggressive driving. Whether you're running these in a Traxxas Stadium Truck, Buggy, or other model, the precision engineering ensures reliable performance session after session. The differential itself allows your outside wheels to rotate faster than inside wheels during cornering, which is essential for proper handling on both road courses and off-road terrain, and this TRX8279R assembly delivers that functionality with the durability expected from a leading RC manufacturer.

What's in the Box

• 37-tooth ring gear for rear differential
• 13-tooth pinion gear for rear differential

Frequently Asked Questions

• What is a differential in an RC car and why do I need to upgrade mine? — A differential is a critical drivetrain component that allows your RC car's wheels to rotate at different speeds during cornering, which is essential for proper handling and traction. Upgrading to a machined Traxxas differential like the TRX8279R improves durability compared to stock components, reduces wear during intensive use, and allows you to tune your gear ratios for specific track conditions or driving styles, whether you're racing on tarmac or bashing off-road terrain.
• How do I know what gear ratio I need for my RC car? — The gear ratio (in this case approximately 2.85:1 with the 37-tooth ring and 13-tooth pinion) affects your vehicle's acceleration and top speed. Lower ratios (smaller ring gear or larger pinion gear) provide faster top speeds but less torque, whilst higher ratios provide better acceleration but lower maximum speeds. Your choice depends on your track layout, driving style, and whether you prioritise speed or acceleration, making this component perfect for experimentation and tuning.
• Is the TRX8279R compatible with my Traxxas vehicle? — This is a genuine Traxxas OEM component designed for rear differentials on compatible Traxxas models. To ensure compatibility with your specific vehicle, check your model's parts manual or contact RC Model Shop for compatibility confirmation, as different Traxxas vehicles may use different differential components.
• What's the difference between machined and moulded differential gears? — Machined gears like those in the TRX8279R are individually manufactured to precise tolerances, resulting in tighter tolerances, less play between gear teeth, longer lifespan, and more consistent performance compared to injection-moulded plastic or stamped metal alternatives that are common in budget components. For serious RC enthusiasts and competitors, machined components deliver noticeably better performance and durability.
• Can I mix and match different pinion and ring gear sizes? — Yes, that's the whole point of upgrading! By choosing different combinations of pinion and ring gear teeth counts, you can create different gear ratios to fine-tune your RC car's performance. However, ensure you're using compatible components that are designed to work together in your specific Traxxas model's differential housing.
• How often should I replace my differential gears? — With proper maintenance, machined gears like the TRX8279R can last hundreds of hours of use. Replace them when you notice stripped teeth, difficulty engaging, or if you want to experiment with different gear ratios. Regular cleaning and light greasing will extend the life of your differential components significantly.

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 gear differential/ pinion gear differential TRX8279R (machined) 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.