Traxxas Centre Differential Kit Complete TRX6780

Overview

The Traxxas Differential kit, centre (complete) TRX6780 is a professional-grade upgrade component designed for serious RC enthusiasts who demand performance and durability from their 4WD RC vehicles. This Pro-Built aluminium center differential represents a significant upgrade from stock slipper clutch systems, offering dramatically improved handling, acceleration, and reliability. Whether you're upgrading a Rustler 4x4, Slash 4x4, or Stampede 4x4 truck, this complete metal center differential kit delivers the kind of performance enhancement that makes a noticeable difference on the track and during recreational bashing sessions across the UK.

If you're running a high-powered brushless RC car and experiencing inconsistent handling or excessive front tyre ballooning, this is the upgrade you've been looking for. The TRX6780 is particularly essential for users who have upgraded their trucks with more powerful motors or higher voltage batteries, as stock differentials simply cannot handle the increased torque and power delivery. This complete kit arrives fully assembled and pre-loaded, meaning you can install it immediately without any additional tuning or preparation required.

RC enthusiasts across the UK trust Traxxas components for their proven engineering and reliability, and this center differential continues that tradition with a sealed design that protects against debris and moisture whilst delivering consistent performance session after session.

Key Features

• Pro-Built Aluminium Housing — The finned aluminium construction provides superior heat dissipation during extended running sessions, preventing the differential from overheating and losing performance even during intense driving. The fins work like a radiator for your differential, keeping internal temperatures within safe operating ranges.
• 54-Tooth 32-Pitch Steel Spur Gear — This robust steel gear is engineered for maximum durability and can handle the power output from modern brushless motors without stripping or failing. The specific 32-pitch sizing ensures compatibility with your vehicle's drivetrain whilst providing a proven gear ratio for balanced performance.
• Sealed Differential Design — The complete sealing prevents mud, water, sand, and other contaminants from entering the differential housing, extending the lifespan of your components and maintaining consistent performance in all weather conditions. This sealed design is particularly valuable for UK basher enthusiasts who may encounter wet or muddy driving conditions.
• Pre-Loaded with 1 Million Weight Silicone Oil — This thick silicone oil comes pre-loaded in the sealed unit and serves a critical function: it prevents unloading and ballooning of the front tyres during hard acceleration. Many stock differentials suffer from front tyre lift during acceleration, but this heavier silicone formulation keeps weight distributed evenly, resulting in better traction and more predictable handling characteristics.
• Completely Assembled and Ready to Install — Unlike some differential kits that require assembly, tuning, and preload adjustment, the TRX6780 arrives fully assembled and ready to drop into your vehicle. This eliminates the need for specialised tools or technical knowledge, making it accessible to intermediate RC car owners who want performance without complexity.
• Absorbs Driveline Shocks — The differential is specifically engineered to absorb sudden driveline shocks that occur during aggressive acceleration, hard braking, and sudden direction changes. This shock absorption protects your entire drivetrain from damage and reduces wear on other components like CV joints and drive shafts.
• Distributes Power to All Four Wheels — By replacing your stock slipper clutch with this performance differential, you ensure that power is distributed more effectively across all four wheels of your 4WD vehicle. This results in mind-bending acceleration and significantly improved off-the-line performance compared to stock setups.

Technical Performance

The TRX6780 is engineered with precision manufacturing standards that Traxxas is renowned for throughout the RC community. The finned aluminium housing provides excellent heat dissipation properties, critical for maintaining performance during long running sessions where heat buildup can reduce differential efficiency. The 54-tooth, 32-pitch steel spur gear is hardened through a specialised process to resist wear and stripping, even when subjected to the extreme torque outputs of modern brushless motors running on 3S or 4S LiPo batteries. The sealed design incorporates multiple contact points and gaskets that prevent oil leakage whilst maintaining a watertight seal against external contaminants. The pre-loaded 1 million weight silicone oil is specifically formulated to provide the correct viscosity for shock absorption and smooth power distribution without sacrificing responsiveness. The complete assembly ensures that preload tensions are correctly set from the factory, eliminating hours of trial-and-error tuning that many owners would otherwise face. This differential is compatible with 32-pitch pinion gears, and installation into compatible 1/10 scale 4WD platforms is straightforward for owners with basic mechanical knowledge and standard RC tools.

What's in the Box

• Pro-Built aluminium center differential assembly with finned housing
• 54-tooth, 32-pitch steel spur gear
• Sealed differential unit pre-loaded with 1 million weight silicone oil
• Fully assembled and ready to install

What You Need to Complete

• 32-pitch pinion gear (compatible with your vehicle's motor and desired gear ratio)

Frequently Asked Questions

• Is the Traxxas TRX6780 center differential suitable for my Slash 4x4 or Rustler 4x4? — Yes, the TRX6780 is specifically designed and fully compatible with Traxxas Rustler 4x4, Slash 4x4, and Stampede 4x4 trucks in all their variants, including the Rustler Ultimate VXL, Slash Ultimate 4x4 VXL, and Slash VXL models. The complete kit installs directly into these vehicles without modification.
• Will this upgrade improve my RC truck's acceleration? — Absolutely. By replacing a stock slipper clutch with this Pro-Built differential that distributes power to all four wheels, you'll experience dramatically improved acceleration. Many UK-based RC enthusiasts report noticeably quicker off-the-line performance and better overall handling balance when upgrading to this differential.
• What does the silicone oil do and why does it need to be 1 million weight? — The pre-loaded 1 million weight silicone oil serves two critical functions: it absorbs shock loads from aggressive driving and, most importantly, it prevents front tyre ballooning and unloading during hard acceleration. Lighter weight oils allow too much differential movement, resulting in the classic problem of front tyres lifting during acceleration. The heavier viscosity keeps everything locked together properly, maintaining traction and control.
• Is this a good upgrade for high-powered brushless RC vehicles? — This is an essential upgrade for any 4WD truck running upgraded brushless motors or higher voltage LiPo batteries. Stock differentials are designed for much lower power outputs and cannot reliably handle modern brushless power. The TRX6780's robust steel spur gear and sealed design make it ideal for high-performance setups.
• How difficult is installation? — Installation is relatively straightforward for anyone with basic RC mechanical skills and standard tools. The unit arrives completely assembled and pre-loaded, so you simply need to remove your stock differential and install this unit in its place. However, you will need to source a compatible 32-pitch pinion gear for your specific motor and desired performance characteristics.
• Does this differential require ongoing maintenance? — The sealed design minimises maintenance requirements compared to open differentials. The pre-loaded silicone oil is sealed inside, so you won't need to add or change oil regularly. Standard RC maintenance practices apply, but the sealed nature of this differential means it can withstand wet or muddy conditions better than traditional open setups.
• What is the difference between this center differential and a stock slipper clutch? — A stock slipper clutch is designed to slip when power becomes excessive, which can lead to inconsistent handling and front tyre ballooning. This center differential uses a sealed housing with optimised silicone oil to absorb shocks whilst maintaining constant power distribution to all four wheels. This results in more predictable handling, better acceleration, and improved durability under high-power conditions.

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 Differential kit, centre (complete) TRX6780 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.