Overview
The Traxxas 13-T Pinion Gear Differential (Rear) TRX7778 is an essential spare part for RC enthusiasts maintaining and upgrading their Traxxas RC cars and trucks. Whether you're a seasoned RC model builder in the UK or someone just discovering the world of RC hobbies, understanding the importance of quality drivetrain components is crucial to keeping your vehicle performing at its best. This rear differential pinion gear is manufactured by Traxxas, a globally recognised leader in RC vehicle engineering, and is designed to deliver reliable performance across a wide range of RC applications.
The differential system in an RC car is one of the most critical components for handling and traction, especially during cornering and off-road driving. The pinion gear within the differential works in harmony with the ring gear to distribute power smoothly to the rear wheels, allowing for smooth turns and maintaining grip on various surfaces. When you're looking for replacement parts to keep your RC car UK-ready and performing at peak efficiency, genuine OEM (Original Equipment Manufacturer) components like this Traxxas pinion gear are the smart choice. This part is ideal for anyone who owns a compatible Traxxas RC model and wants to maintain factory specifications or refresh worn drivetrain components after intensive use.
RC Model Shop stocks genuine Traxxas spares and accessories to support your RC hobby at every stage, from initial purchase through to long-term maintenance and upgrades. This rear differential pinion gear represents the quality and reliability you can expect from authorised Traxxas dealer stock, ensuring that when you replace your worn or damaged components, you're getting authentic parts engineered to the same exacting standards as your original vehicle.
Key Features
- Genuine Traxxas OEM Component — This is an authentic original equipment manufacturer part directly from Traxxas, ensuring perfect compatibility with your RC vehicle and guaranteed performance that matches your car's original factory specifications without compromise.
- Rear Differential Application — Specifically engineered for rear differential duty, this pinion gear is optimised for handling torque distribution and smooth power delivery to the rear axles, which is essential for maintaining traction and cornering performance in RC cars and trucks.
- 13-Tooth Configuration — The 13-tooth design provides a specific gear ratio that affects acceleration and top-speed balance in your RC model, making this part critical for tuning the performance characteristics of your vehicle.
- Drivetrain Spares Classification — Categorised as a drivetrain spare, this component is part of the critical power transmission system that converts engine or motor power into wheel rotation, making it essential for any RC vehicle experiencing drivetrain wear or damage.
- Direct Replacement Part — Designed as a direct fit replacement for compatible Traxxas models, installation is straightforward for anyone familiar with basic RC maintenance, making it an accessible upgrade or repair solution.
- Quality Manufacturing Standards — Built to Traxxas's renowned engineering standards, this pinion gear features precision-machined construction that ensures smooth meshing with the ring gear and minimal backlash for optimal performance.
Technical Performance
The Traxxas 13-T Pinion Gear Differential represents precision engineering in drivetrain component design. As a rear differential pinion gear, this part works in conjunction with the ring gear to create the differential assembly that allows power to be distributed to both rear wheels while permitting them to rotate at different speeds during cornering. The 13-tooth configuration is a critical specification that directly impacts your RC vehicle's performance characteristics—it influences the gear ratio between the motor and the wheels, affecting both acceleration and top-speed potential. Traxxas engineers these components using durable materials and precision manufacturing processes to ensure minimal wear, smooth operation, and long service life even under the demanding conditions typical of RC bashers and racers. The part is manufactured to exacting tolerances that guarantee perfect meshing with compatible ring gears, reducing noise, vibration, and power loss through the drivetrain. Whether you're running a competitive race vehicle or enjoying casual weekend bashing with your RC car in the UK, this pinion gear maintains the reliability and performance consistency that Traxxas vehicles are known for. Regular inspection and replacement of wear items like this differential pinion gear is part of responsible RC vehicle maintenance and ensures your model continues to perform at its peak.
What's in the Box
- Traxxas 13-T Pinion Gear Differential (Rear) — one piece
Frequently Asked Questions
- What vehicles is the Traxxas TRX7778 pinion gear compatible with? — The TRX7778 is designed as a rear differential pinion gear for compatible Traxxas RC models. To ensure compatibility with your specific vehicle, we recommend checking your model's parts diagram or contacting our expert team at RC Model Shop, as different Traxxas models use different differential configurations.
- How often should I replace my RC differential pinion gear? — The lifespan of a pinion gear depends on how intensively you use your RC vehicle. Weekend bashers might get several seasons of use, whilst competitive racers who frequently push their vehicles to the limit may need replacement more often. Signs of wear include rough differential operation, increased noise, or visible damage to the gear teeth. If you notice any of these symptoms, replacement is recommended.
- Is this a difficult part to install on my Traxxas RC model? — Replacing a rear differential pinion gear requires some mechanical knowledge and the right tools, including a differential tool kit. If you're not experienced with RC maintenance, our team at RC Model Shop can provide guidance, or you may prefer to visit a specialist RC service centre. The installation process varies by vehicle model, so consult your instruction manual first.
- What is the difference between pinion and spur gears in RC differentials? — The pinion gear (which this part is) typically operates internally within the differential assembly and works with the ring gear to create the differential's speed-limiting and power-distribution functions. The spur gear, by contrast, is usually mounted on the motor shaft and meshes with the pinion. Both are essential for proper drivetrain function.
- Why buy genuine Traxxas parts instead of aftermarket alternatives? — Genuine OEM Traxxas components are engineered to exact specifications and quality standards, guaranteeing compatibility, durability, and performance. Using genuine parts maintains your vehicle's warranty protection and ensures you experience the performance and reliability that Traxxas engineering is renowned for across the UK RC community.
- Can I upgrade to a different tooth count pinion gear for better performance? — Yes, changing the pinion gear tooth count can adjust your vehicle's acceleration and top-speed balance. A higher tooth count provides better acceleration but lower top speed, whilst a lower tooth count allows higher top speed but reduced acceleration. Experiment cautiously to find your preferred setup, and always ensure any alternative gear is compatible with your specific model.
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 13-T Pinion Gear Differential (Rear) TRX7778 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: TRX7778
- EAN Code: 0020334777805
- Part Type: Rear Differential Pinion Gear
- Component Category: Drivetrain Spares
- Tooth Count: 13-T (13 teeth)
- Application: Rear Differential
- OEM Status: Genuine Original Equipment Manufacturer Part
- Compatibility: Compatible with select Traxxas RC models featuring this differential configuration
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
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- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
