Overview
The ARRMA Diff Internal Gear Set is an essential replacement component for owners of high-performance 1/5 scale brushless RC trucks. Whether you're running an ARRMA Kraton 8S, Outcast 8S, or compatible models, this genuine OEM differential gear set provides the precision engineering and durability needed to keep your RC car UK competition-ready or weekend-warrior capable. Differential systems are critical to RC performance, allowing your wheels to rotate at different speeds during cornering whilst maintaining traction and control. When wear occurs or damage happens during intense bashing sessions, having access to quality replacement parts ensures your RC truck remains in peak condition.
This differential internal gear set is manufactured by ARRMA, the brand trusted by serious RC enthusiasts across the UK and globally. The set includes all the essential internal components needed to rebuild or service your differential assembly, ensuring consistent performance in all driving conditions. Whether you're a competitive racer looking to maintain your machine to factory specifications, or a dedicated basher who pushes their RC truck to the limit, this genuine part delivers the reliability and precision fit that ARRMA vehicles demand. Unlike generic aftermarket alternatives, this OEM gear set is engineered specifically for your ARRMA 8S platform and guarantees compatibility and performance.
RC hobbyists know that maintaining transmission components like differentials is crucial for longevity and performance. This Diff Internal Gear Set takes the guesswork out of repairs and replacements, providing you with factory-spec components that work seamlessly with your existing drivetrain. With a 5-star customer rating, this part has proven itself in the hands of demanding RC drivers across the UK who expect nothing but the best from their equipment.
Key Features
- Tough and Durable Steel Construction — The gears are manufactured from steel rather than plastic or softer materials, which allows them to withstand the extreme forces and impacts that occur during aggressive RC driving and competitive racing. Steel gears resist stripping and damage far better than inferior materials, ensuring your differential maintains power delivery and responsiveness even when pushed hard.
- Precision Manufactured Gear Teeth — Each gear tooth is precision engineered to exacting tolerances, delivering consistent performance whether you're driving on tarmac, dirt, concrete or grass. This precision ensures smooth meshing between components, reducing noise, vibration and wear whilst maintaining efficient power transfer from your motor to the wheels at all times.
- Metal Cross Shafts for Long-Lasting Durability — The cross shafts in this set are manufactured from metal rather than plastic, providing superior strength and rigidity. This construction enables the differential to handle high-speed running and extreme cornering forces without flex or failure, essential for 8S brushless power where torque and acceleration are substantial.
- Efficient Running at High Speeds — The robust metal construction and precision gearing allow this differential to operate smoothly and reliably even at the maximum speeds that modern brushless RC trucks can achieve. You'll experience consistent handling and predictable performance whether you're cruising or at full throttle.
- OEM Quality Compatibility — As a genuine ARRMA part, this differential gear set is engineered to exact factory specifications for perfect fitment with your RC truck's existing drivetrain. There's no guesswork or fitment issues when using factory components.
Technical Performance
This Diff Internal Gear Set represents the engineering excellence that ARRMA applies to all their genuine replacement parts. The set comprises four 13-tooth satellite gears, two cross shafts, two 20-tooth planetary gears, and shims—all the internal components needed to assemble a fully functional differential. The steel construction throughout ensures that this gear set can handle the tremendous forces generated by brushless motors and modern 8S LiPo battery systems. When running 8S brushless power on vehicles like the 1/5 Kraton 8S or Outcast 8S, differential components face significant stress during acceleration, cornering and deceleration. The precision manufacturing tolerances and quality materials used in this set ensure it maintains smooth operation and efficient power delivery under these demanding conditions. The metal cross shafts are particularly important for high-speed running, as they resist the bending and flexing that can occur when plastic components encounter shock loads or sustained high-RPM operation. The satellite and planetary gears are cut with precision tooth profiles that ensure optimal meshing and minimal backlash, translating to responsive handling and predictable vehicle behaviour. Whether you're experiencing differential wear from extended use or have damaged internal components from a heavy impact, this authentic ARRMA replacement set restores your truck to factory performance standards.
What's in the Box
- 4 x 13T Satellite Gears
- 2 x Cross Shaft
- 2 x 20T Planetary Gear
- 2 x Shim
Frequently Asked Questions
- What vehicles is the ARRMA Diff Internal Gear Set compatible with? — This genuine ARRMA part (ARA310914) is designed as a standard part for the 1/5 ARRMA Kraton 8S 4X4 RTR, the 1/5 Kraton 8S EXB 4X4 Roller, the 1/5 Kraton 8S EXB AVC 4X4 RTR, and the 1/5 ARRMA Outcast 8S models including the Outcast 8S AVC RTR, Outcast 8S EXB Roller, and Outcast 8S EXB AVC RTR. If you own one of these ARRMA 8S trucks, this is the correct replacement differential gear set for your vehicle.
- Do I need any tools or special skills to install this differential gear set? — Differential assembly requires disassembling the differential housing and carefully installing the components in the correct sequence. Most experienced RC enthusiasts can handle this work, though some may prefer to have a hobby shop or experienced friend assist. You'll need basic RC tools and access to the ARRMA instruction manual for your specific vehicle to ensure correct assembly.
- Is this a genuine ARRMA part? — Yes, this is an authentic ARRMA OEM (original equipment manufacturer) part, model number ARA310914. Buying genuine parts ensures perfect compatibility and optimal performance with your RC truck.
- Why should I replace my differential gears? — Differential gears can wear over time with extensive use, or become damaged from impacts or collisions. If you notice your RC truck's handling is unpredictable, if you hear grinding noises from the differential, or if you've had a crash that damaged the drivetrain, replacing the internal gear set will restore your truck to full performance. Regular maintenance of differential components is part of responsible RC ownership.
- What is the difference between this and plastic differential gears? — This set uses steel gears and metal cross shafts, which are significantly more durable than plastic alternatives. Steel resists stripping, bending and wear far better than plastic, making it the ideal choice for serious RC drivers who want their trucks to handle the stresses of brushless power and aggressive driving.
- Is this suitable for beginners? — Whilst the part itself is straightforward in function, differential assembly is an intermediate-level maintenance task. Beginners new to RC may find it helpful to have an experienced RC enthusiast guide them through the assembly process, or to have a hobby shop perform the installation.
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 Diff Internal Gear Set (1 Diff) 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.
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