- Manufacturer: ARRMA
- Part Number: Z-ARA310985
- EAN: 5052127036344
- Type: Diff Gear Set
- Compatibility: 29mm diff case differentials
- Satellite Gears: 4 x 10T steel gears
- Planetary Gears: 2 x 20T steel gears
- Cross Shafts: 2 x metal cross shafts
- Material: Durable steel with precision-manufactured teeth
- Differential Configuration: Compatible with limited slip and open diff builds
- Compatible Vehicles: Arrma 1/8 Kraton 6S EXB 4x4 RTR, Arrma 1/7 Limitless 8S AVC 4x4 RTR, Arrma 1/7 Talion 6S EXB 4x4 RTR
- Tune-Up Type: Transmission
Overview
The ARRMA Diff Gear Set for 29mm Diff Case Z-ARA310985 is an essential replacement component for ARRMA RC enthusiasts who demand reliability and performance from their vehicles. Whether you're a dedicated basher pushing your RC monster truck or speed truck to its limits, or a competitor fine-tuning your transmission setup, this precision-engineered diff gear set delivers the durability and consistent performance needed to keep you racing and bashing with confidence. This genuine ARRMA component is designed specifically for 29mm diff cases and represents a direct replacement for worn or damaged differential gears, making it an ideal choice for RC car UK owners looking to maintain their vehicles to factory specifications.
Manufactured to exacting standards by ARRMA, this diff gear set combines durable steel construction with precision engineering to ensure that your RC vehicle's power delivery remains smooth, efficient and responsive in all conditions. The set is compatible with both limited slip and open diff builds, giving you the flexibility to configure your transmission to suit your driving style and terrain. Whether you're running an ARRMA Kraton 6S EXB monster truck, a Limitless 8S high-speed touring car, or a Talion 6S speed truck, this diff gear set will restore your differential to factory performance levels.
As an essential transmission tune-up component, the ARRMA Diff Gear Set represents outstanding value for money and is backed by ARRMA's reputation for quality and innovation in the RC hobby. This is genuine ARRMA equipment, not a third-party copy, ensuring compatibility and reliability with your specific ARRMA model.
Key Features
- Durable Steel Gears — The 10T satellite gears and 20T planetary gears are manufactured from hardened steel specifically chosen to withstand the extreme stresses of high-speed RC action, whether you're bashing through rough terrain or competing at racing speeds, ensuring these components will deliver reliable performance over extended periods of use.
- Precision Manufactured Gear Teeth — Each gear tooth is machined to exacting tolerances to ensure accurate gear mesh between all components, which means smooth power transmission, reduced noise, consistent performance in all driving conditions, and less wear on the differential case itself.
- Strong Steel Cross Shafts — The two metal cross shafts are engineered from robust steel material to provide long-lasting durability and maintain efficient running even at high speeds, preventing flex and ensuring that torque is delivered reliably to the driving wheels without loss of efficiency.
- Compatible with 29mm Diff Cases — This gear set is specifically designed for 29mm diameter differential cases, making it a direct replacement for original equipment on compatible ARRMA models and ensuring a perfect fit with no modification required.
- Flexible Differential Configuration — The component set can be used in both limited slip and open diff builds, giving you the flexibility to tune your vehicle's handling characteristics to match your driving style and the terrain you're running on, whether that's circuit racing or off-road bashing.
- Genuine ARRMA Equipment — As an official ARRMA component, this diff gear set is manufactured to the same exacting standards as the original equipment in your vehicle, guaranteeing compatibility and long-term reliability.
Technical Performance
The ARRMA Diff Gear Set delivers exceptional technical performance through its carefully engineered construction and material selection. The combination of four 10T satellite gears and two 20T planetary gears creates a differential system capable of handling the torque and rotational forces generated by high-performance brushless RC motors and modern ESC technology. The precision-manufactured gear teeth are cut to ensure perfect mesh alignment, which is critical for smooth power delivery and longevity. Steel cross shafts provide the rigidity needed to maintain component alignment and prevent the flex and play that can develop in inferior differential systems, particularly important when running at sustained high speeds or through rough terrain. The 29mm diff case compatibility makes this an essential component for owners of current-generation ARRMA vehicles including the 1/8 scale Kraton 6S EXB, the 1/7 Limitless 8S, and the 1/7 Talion 6S, all of which demand reliable and responsive differential performance. The ability to configure these components in both limited slip and open differential setups means you can optimise handling for different conditions — a limited slip setup provides better traction on loose terrain and during acceleration, whilst an open diff offers more predictable handling on circuit tracks and asphalt.
What's in the Box
- 4 x 10T Satellite Gears
- 2 x 20T Planetary Gears
- 2 x Metal Cross Shafts
What You Need to Complete
- 29mm Diff Case (if not already installed in your ARRMA vehicle)
- Differential Oil or Grease (for assembly and running)
Frequently Asked Questions
- Is the ARRMA Diff Gear Set Z-ARA310985 compatible with my RC vehicle? — This diff gear set is designed specifically for ARRMA vehicles with 29mm diff cases. It is confirmed compatible with the Arrma 1/8 Kraton 6S EXB 4x4 RTR, the Arrma 1/7 Limitless 8S AVC 4x4 RTR, and the Arrma 1/7 Talion 6S EXB 4x4 RTR. If you own a different ARRMA model, please check your vehicle documentation to confirm your diff case diameter before ordering. This genuine ARRMA component ensures factory-specification fitment and performance.
- When should I replace my RC car's diff gears? — Diff gears should be replaced when you notice signs of wear including unusual grinding or clicking noises from the differential, uneven power delivery to the wheels, reduced traction during acceleration, or visible damage to the gears themselves. Regular inspection during routine maintenance can help identify wear before it becomes a problem. For serious bashers and racers who run frequently, replacement every 12 months or after significant impacts is recommended preventative maintenance.
- What is the difference between limited slip and open differential setups? — An open differential allows the inside and outside wheels to spin at different speeds, which is ideal for circuit racing and on-road use as it provides more predictable handling on smooth surfaces. A limited slip differential restricts the speed difference between wheels, providing better traction during acceleration and better performance on loose or off-road terrain by preventing wheel spin. This diff gear set supports both configurations, so you can choose based on your intended use.
- Are these gears genuine ARRMA components? — Yes, the ARRMA Diff Gear Set Z-ARA310985 is genuine OEM equipment manufactured by ARRMA to the same exacting specifications as the components in your vehicle. Using genuine ARRMA parts ensures compatibility, reliability and warranty coverage, unlike third-party alternatives that may not fit correctly or provide equivalent durability.
- Is this suitable for beginners? — Replacing a diff gear set requires some mechanical knowledge and proper tools, as the differential must be carefully disassembled and reassembled with precision. This is not a beginner-friendly task and is best performed by someone with experience working on RC vehicles. However, if you have a Ready to Run RC car UK and want to learn differential maintenance, this is an excellent component to work with, and our experienced team at RC Model Shop can provide guidance or assist with installation.
- How long will these gears last? — The durability of these steel gears depends significantly on driving style, maintenance, and the conditions in which you operate your vehicle. With proper maintenance including regular cleaning and appropriate differential oil or grease, these gears will provide thousands of kilometres of reliable service. Aggressive bashing and high-speed racing will naturally accelerate wear compared to casual weekend driving.
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 ARRMA Diff Gear Set for 29mm Diff Case Z-ARA310985 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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