- Product type: Steel Diff Outdrive replacement pair
- ARRMA part number: ARA310981
- EAN: 5052127036382
- Quantity included: 2 x Steel Diff Outdrive
- Material: Steel
- Compatible diff case size: 29mm
- Compatible diff cases: ARA310983 or ARA311061
- Finish: Precision machined
- Installation: Requires 29mm diff case assembly
- Compatible vehicle scales: 1/8 scale and 1/7 scale ARRMA models
- Compatible with ARRMA EXB platform vehicles
- Compatible with brushless 6S LiPo powered vehicles (KRATON 6S, NOTORIOUS 6S, OUTCAST 6S, TALION 6S, MOJAVE 6S)
- Compatible with brushless 8S LiPo powered vehicles (LIMITLESS 8S, selected EXB variants)
- Vehicle compatibility: 1/8 KRATON 6S, 1/8 NOTORIOUS 6S, 1/8 OUTCAST 6S, 1/8 TALION 6S, 1/7 FIRETEAM 6S, 1/7 LIMITLESS 8S, 1/7 MOJAVE 6S and variants
- Available in multiple model fitments including RTR, Roller, and EXB AVC versions
- Features: Manufactured from tough steel for long lasting durability
- Features: Precision machined for accurate fit
- Features: Smooth and leak-free differential action
- Installation type: Replacement transmission component
- Transmission type: Differential outdrive
Overview
The ARRMA Steel Diff Outdrive (2): EXB is an essential replacement transmission component designed for serious RC enthusiasts running high-performance ARRMA vehicles. This pair of steel diff outdrives represents a critical upgrade or replacement part for bashers, racers and weekend warriors who demand reliability from their RC car UK setup. Whether you're rebuilding after intense off-road action or upgrading from worn components, these precision-engineered outdrives deliver the durability and performance expected from ARRMA's engineering heritage.
These steel diff outdrives are compatible with a wide range of ARRMA's brushless RC models, from the compact 1/8 scale speed trucks like the KRATON 6S and TALION 6S, to the larger 1/7 scale machines including the LIMITLESS and MOJAVE variants. The EXB designation indicates compatibility with ARRMA's latest high-performance platform, ensuring you're getting the most current engineering and specifications. For RC enthusiasts in the UK looking for authentic, factory-backed replacement parts, this is the genuine solution.
These outdrives are manufactured to the highest standards and supplied as a ready-to-install pair, making them the ideal choice for anyone maintaining or repairing their ARRMA ready to run RC vehicle. Whether you're a competitive racer, a weekend basher pushing your truck to the limit, or someone who simply wants spare transmission components on hand, the Steel Diff Outdrive (2): EXB provides the peace of mind that comes with genuine factory parts.
Key Features
- Steel construction for durability — Manufactured from tough steel rather than plastic or softer materials, these outdrives are built to withstand the extreme stresses of high-performance RC driving, ensuring they will not strip or fail during intense acceleration or cornering loads.
- Precision machined for accuracy — Each outdrive is precision machined to exacting tolerances, guaranteeing a perfect fit within the diff case assembly and ensuring smooth, consistent differential action without binding, slipping or unwanted play.
- Smooth and leak-free operation — The precision engineering delivers leak-free differential action, meaning your diff fluid stays where it belongs and performance remains consistent lap after lap and session after session.
- Supplied as a complete pair — You receive two outdrives in this package, which is exactly what you need to fully service or replace both sides of your differential assembly in one purchase.
- 29mm diff case compatibility — These outdrives are specifically designed to work with ARRMA's 29mm diff cases (models ARA310983 or ARA311061), ensuring perfect fitment and performance integration.
- Factory original specifications — As genuine ARRMA parts, these outdrives maintain factory specifications and standards, so you can be confident they will perform exactly as your vehicle was engineered to perform.
Technical Performance
The Steel Diff Outdrive (2): EXB represents ARRMA's commitment to transmission reliability and performance in their EXB platform vehicles. Steel is the material of choice for demanding RC applications because it offers superior strength-to-weight ratio compared to plastic, resists wear and deformation under extreme load, and maintains consistent tolerances throughout thousands of driving cycles. The precision machining process used in manufacturing these components ensures that the bearing surfaces, gear engagement points, and mounting interfaces all meet exact specifications, resulting in smooth differential action that distributes torque evenly to both wheels whilst allowing them to rotate at different speeds during cornering. This is essential for maintaining traction and control, particularly in competitive racing environments or aggressive off-road bashing. The leak-free engineering means your differential fluid remains sealed within the case, maintaining optimal lubrication and thermal properties during extended running sessions. These outdrives are engineered to handle the output of ARRMA's brushless motor systems across their range of 6S and 8S LiPo powered vehicles, making them suitable for both the 1/8 scale speed trucks and the larger 1/7 scale machines in the ARRMA lineup.
What's in the Box
What You Need to Complete
- 29mm diff case — Either ARA310983 or ARA311061 (must be ordered separately if not already installed on your vehicle)
Frequently Asked Questions
- Which ARRMA vehicles are compatible with these Steel Diff Outdrives? — These outdrives fit a comprehensive range of ARRMA models including the 1/8 KRATON 6S (all variants including EXB AVC RTR and Roller), NOTORIOUS 6S (RTR and Limited Edition versions), OUTCAST 6S (RTR and EXB AVC RTR versions), and TALION 6S (including the EXB AVC RTR variant). They are also compatible with larger 1/7 scale machines including the FIRETEAM 6S, LIMITLESS 120 8S AVC, and MOJAVE 6S variants. Compatibility extends across RTR (Ready to Run), Roller, and EXB versions of these models.
- Do I need to replace my entire diff assembly or just these outdrives? — You only need these outdrives if they are worn, damaged or stripped. If your 29mm diff case is still in good condition, simply installing this pair of replacement outdrives will refresh your differential performance. However, you must have a compatible 29mm diff case already, as these outdrives are designed to work specifically with that case size.
- What is the difference between steel and plastic outdrives? — Steel outdrives offer significantly greater durability and strength compared to plastic alternatives. Plastic outdrives can strip or crack under extreme loads, particularly during high-speed acceleration or aggressive cornering. Steel maintains its shape and strength through thousands of operating cycles, making it the preferred choice for competitive racing and demanding off-road use. The precision machining of steel also allows for tighter tolerances and smoother operation.
- Are these genuine ARRMA parts? — Yes, these are genuine ARRMA OEM (Original Equipment Manufacturer) parts with the official ARRMA part number ARA310981, ensuring they meet all factory specifications and quality standards. Buying genuine parts guarantees compatibility, performance and reliability.
- Can I use these outdrives in other vehicles or scales? — No, these outdrives are specifically engineered for use with 29mm ARRMA diff cases and are not compatible with other RC brands or diff case sizes. Using them with incompatible assemblies will result in poor fit, leaking, and potential damage.
- How often should I replace my diff outdrives? — In normal recreational use, quality steel outdrives can last for many years. However, if you race competitively, bash aggressively, or notice signs of wear such as slipping in the diff, grinding noises, or differential fluid leaks, it is time to replace them. Having spare outdrives on hand ensures you can get back on the track or trail quickly.
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 Steel Diff Outdrive (2): EXB 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.
We want to make sure your delivery goes smoothly, so here are some important details about our service:
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