Overview
The Traxxas Carrier, Differential (heavy duty) / x-ring gaskets (2 pcs) / ring gear gasket / bushings (2 pcs) / 6x10x0.5 TW TRX3978 is an essential drivetrain spare part for serious RC enthusiasts and competitive racers across the UK. This heavy-duty differential carrier assembly is engineered to deliver superior performance and durability in demanding driving conditions, whether you're bashing on weekend adventures or competing in organised RC racing events. As a genuine Traxxas component, this part meets the exacting standards that have made Traxxas the choice of professional RC drivers and hobbyists alike.
If you own a Traxxas RC car and want to maintain peak performance or upgrade your drivetrain for greater reliability, this differential carrier kit is precisely what you need. The heavy-duty construction ensures that your vehicle can handle the stresses of high-speed cornering, aggressive acceleration and the punishing impacts that come with serious RC driving. Whether you're running a ready to run RC car UK or building a competition-grade machine, having genuine replacement parts on hand is essential for keeping your vehicle running smoothly and extending its operational lifespan.
This comprehensive kit includes everything needed for a complete differential carrier assembly, with all the gaskets, bushings and sealing components required for a professional installation. The quality engineering and attention to detail that goes into every Traxxas part ensures that you're investing in reliability, performance and the peace of mind that comes from using factory-approved components.
Key Features
- Heavy-Duty Differential Carrier — The main carrier component is engineered with reinforced construction to withstand extreme torque loads and aggressive driving styles, ensuring your RC car remains responsive and reliable even during intense racing sessions or high-powered bashers.
- X-Ring Gaskets (2 pieces) — These precision-moulded gaskets provide superior sealing compared to standard O-rings, preventing fluid leakage from the differential assembly and maintaining optimal lubrication for smoother, quieter operation and extended component lifespan.
- Ring Gear Gasket — This specialised gasket ensures a watertight seal around the ring gear, protecting the internal differential components from dirt, moisture and contamination that could compromise performance or cause premature wear.
- Bushings (2 pieces) — The included bushings provide smooth, wear-resistant support for the carrier assembly, reducing friction and noise while maintaining precise alignment for consistent handling and predictable RC car performance.
- Complete Assembly Kit — This kit provides everything necessary for a full differential carrier rebuild or replacement, eliminating the need to source multiple components separately and ensuring all parts are perfectly matched and compatible.
- Genuine Traxxas Component — As an authentic Traxxas part, this component is manufactured to factory specifications and guaranteed to fit and function perfectly with compatible Traxxas RC vehicles.
- 6x10x0.5 TW Specification — The precise dimensional specification ensures perfect fitment and optimal performance characteristics, maintaining the engineering integrity that Traxxas vehicles are famous for across the RC community.
Technical Performance
The Traxxas Carrier, Differential (heavy duty) represents a significant advancement in drivetrain durability and performance. The heavy-duty construction is specifically designed to handle the extreme stresses generated by brushless motors and high-performance driving, making it an ideal upgrade for competitive racers or drivers who push their RC cars to the limit. The inclusion of X-Ring gaskets demonstrates Traxxas's commitment to engineering excellence; these superior sealing components create a tighter seal than traditional O-rings, reducing fluid loss and maintaining consistent differential performance across extended driving sessions. The ring gear gasket provides an additional layer of protection, creating a complete moisture barrier that keeps internal components clean and properly lubricated regardless of driving conditions. The bushings are precision-engineered to support the carrier assembly with minimal friction, enabling smooth power delivery and predictable handling characteristics that are essential for competitive racing or technical driving. Every component in this kit is manufactured to exacting Traxxas standards, utilising proven materials and engineering principles that have made Traxxas vehicles the benchmark for performance and reliability in the RC hobby across the United Kingdom and beyond.
What's in the Box
- Carrier - Differential (Heavy Duty)
- X-Ring Gaskets (2 pieces)
- Ring Gear Gasket
- Bushings (2 pieces)
- 6x10x0.5 TW specification components
Frequently Asked Questions
- What Traxxas RC models is this differential carrier compatible with? — This heavy-duty differential carrier is designed for specific Traxxas models. To confirm compatibility with your particular RC vehicle, please check your Traxxas instruction manual or contact our expert team at RC Model Shop, who can verify fitment with your exact model and setup.
- Why would I need a heavy-duty differential carrier? — The heavy-duty construction is essential if you're running a high-powered brushless motor, driving competitively, or subjecting your RC car to aggressive bashing. The reinforced design handles increased torque and stress far better than standard carriers, preventing premature wear and maintaining consistent performance.
- What is the purpose of X-Ring gaskets versus standard O-rings? — X-Ring gaskets provide superior sealing compared to traditional O-ring designs due to their distinctive cross-sectional shape. This improved seal prevents differential fluid from leaking, maintains optimal lubrication levels, and reduces the risk of contamination entering the assembly, all of which contribute to longer component life and more reliable performance.
- How often should I replace the differential carrier assembly? — Under normal driving conditions, a quality differential carrier assembly should provide thousands of kilometres of reliable service. However, if you notice leaking fluid, grinding sounds, or inconsistent handling, it may be time to inspect or replace the gaskets and bushings in this kit.
- Is professional installation required? — Differential carrier installation requires some mechanical knowledge and proper tools. If you're experienced with RC car maintenance, you can perform the installation yourself by following your vehicle's service manual. If you're uncertain, our team at RC Model Shop can provide guidance or recommend qualified technicians who can help.
- Does this kit include everything needed for a complete rebuild? — This kit includes the essential sealing and support components for the differential carrier assembly. Depending on the condition of your existing carrier, you may or may not need to replace the main carrier housing itself; however, the gaskets and bushings included in this kit should address most standard maintenance and upgrade requirements.
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 Carrier, Differential (heavy duty) / x-ring gaskets (2 pcs) / ring gear gasket / bushings (2 pcs) / 6x10x0.5 TW TRX3978 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.
- Spare Part Type: Drivetrain Spares
- Manufacturer: Traxxas
- Part Number: TRX3978
- EAN: 0020334397805
- Component Type: Differential Carrier (Heavy Duty)
- Included Components: Carrier assembly, X-Ring gaskets (2 pieces), ring gear gasket, bushings (2 pieces)
- Specification: 6x10x0.5 TW
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.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- 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.
