Overview
The ARRMA Differential Planet Gear (4) is an essential replacement component for serious RC enthusiasts who demand reliability and performance from their 1/10 and 1/8 scale RC vehicles. Whether you're bashing with a brushless RC monster truck, competing in high-speed stadium truck races, or pushing your RC buggy to its limits, these differential gears are critical to maintaining consistent drivetrain performance. As an authorised ARRMA retailer, we stock genuine OEM parts that are engineered to the same exacting standards as your original RC car UK setup.
Differential planet gears are among the hardest-working components in any RC transmission system. They distribute power between the left and right wheels while allowing different rotational speeds during cornering, which is essential for smooth handling and predictable performance. Over time, particularly with aggressive driving, bashing, or racing, these gears can wear or become damaged, leading to drivetrain noise, loss of traction, and unpredictable handling characteristics. That's why having genuine replacement gears on hand is crucial for any serious RC hobbyist.
This set of four differential planet gears is designed to replace one complete differential assembly, making it perfect for maintenance, repairs, or upgrades. ARRMA's precision manufacturing ensures that these gears mesh perfectly with your existing drivetrain components, delivering the same smooth, reliable performance you expect from your ready to run RC vehicle or competition-grade setup.
Key Features
- Tough and Durable Steel Construction — Manufactured from hardened steel, these differential planet gears are engineered to withstand the extreme forces generated during high-speed running, aggressive cornering, and intense bashing. Steel construction provides superior wear resistance compared to plastic alternatives, ensuring your differential remains reliable through countless driving sessions and competitive races.
- Precision Manufactured Gear Teeth — Each gear tooth is manufactured to exacting tolerances, ensuring consistent meshing with the crown gear and consistent performance in all driving conditions. Precision-cut teeth reduce noise, improve power transmission efficiency, and provide predictable handling characteristics whether you're driving a brushless RC short course truck or a competition-grade 1/8 buggy.
- Set of Four Gears — This package includes all four planet gears needed to completely rebuild one differential assembly. This means you can replace your entire differential without purchasing multiple individual gears, saving money and ensuring all components are the same age and wear level for optimal performance consistency.
- OEM ARRMA Quality — These are genuine ARRMA original equipment manufacturer parts, not aftermarket substitutes. That means they're manufactured to the exact specifications of your vehicle, compatible with all ARRMA differentials, and backed by ARRMA's reputation for quality and reliability in the RC hobby.
- Broad Vehicle Compatibility — These gears are used in numerous ARRMA models including the Granite, Senton, Vorteks, Kraton, Outcast, Typhon, Infraction, Mojave, Big Rock, Fury, Gorgon, and Quake, making them a versatile spare part for any ARRMA fleet.
Technical Performance
The differential is one of the most critical components in any RC vehicle's drivetrain, and the planet gears are the heart of that system. During acceleration, the planet gears transmit power from the main drive gear to both axles, allowing each wheel to rotate at the same speed. During cornering, the differential's design allows the inside wheel to rotate slower than the outside wheel, which is essential for maintaining traction and predictable handling. The planet gears must be precisely manufactured to tolerances measured in fractions of a millimetre, and they must be tough enough to handle the extreme forces generated by brushless motors, which can deliver torque spikes far exceeding what nitro or brushed electric motors produce. These ARRMA gears are engineered with this in mind, featuring hardened steel construction and precision-ground teeth that ensure smooth, quiet operation and maximum power transmission efficiency. Whether you're running a 3S LiPo brushless setup on a short course truck or an 8S competition-grade 1/8 buggy, these gears provide the reliability you need. The set of four ensures that you can completely rebuild your differential without worrying about mixed generations of gears, which can cause noise and premature wear.
What's in the Box
- 4 x Differential Planet Gears (steel, precision manufactured)
Frequently Asked Questions
- What ARRMA RC models are compatible with these differential planet gears? — These gears are standard parts for a comprehensive range of ARRMA vehicles including the 1/10 Big Rock 223S, 1/10 Granite 223S, 1/10 Senton 223S, 1/10 Vorteks 223S, 1/10 Kraton 4S, 1/10 Outcast 4S, 1/8 Typhon 223S, 1/8 Infraction 223S, 1/8 Mojave 4S, and many other brushless and brushed models across their range. If you own an ARRMA vehicle and need to service or repair your differential, these gears are the genuine replacement component.
- Why would I need to replace my differential planet gears? — Differential gears can wear, strip, or break due to normal use, aggressive bashing, or racing. Signs that your gears need replacement include grinding or whining noises from the differential, loss of traction on certain surfaces, or difficulty turning. If you notice your RC car UK's handling has changed or you hear unusual sounds from the drivetrain, inspecting and potentially replacing the planet gears is a good troubleshooting step.
- Can I replace just one gear or do I need all four? — It's best practice to replace all four planet gears at the same time, which is why they're sold as a set. If you replace only one or two gears, the new gears will have different wear characteristics than the older gears, which can cause noise, inconsistent handling, and premature wear of all the gears. Since these are sold as a complete set for one differential, replacing all four ensures matching wear profiles and optimal performance.
- Are these gears the same quality as the gears in a new ARRMA RTR vehicle? — Yes, these are genuine OEM ARRMA parts manufactured to the same specifications and quality standards as the gears supplied in new ready to run RC vehicles. They come directly from ARRMA's supply chain and are identical to what you'll find in any new ARRMA model.
- How difficult is it to replace differential planet gears? — Replacing differential gears requires disassembling your differential, which is an intermediate-level task. You'll need a differential gear tool or punch to carefully remove the cross pin, then you can slide the old gears out and new ones in. If you're not comfortable with this level of work, many local hobby shops or RC clubs offer service and repair assistance. Alternatively, you can send your differential to an ARRMA service centre for professional replacement.
- Will these gears work with both brushless and brushed ARRMA motors? — Yes, the differential and its planet gears are identical regardless of whether your ARRMA vehicle uses a brushless or brushed motor. The motor type doesn't affect the differential's design, so these gears will work with any compatible ARRMA model.
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 Differential Planet Gear (4) 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.
