- Brand: ARRMA
- Model Number: ARA310989
- Part Type: Centre Differential - Drivetrain Spares
- Spur Gear Teeth: 46T
- Spur Gear Material: Steel
- Differential Case Material: Composite
- Internal Gears Material: Steel
- Cross Shafts: Metal construction with inserts
- Silicone Oil Viscosity: 100k cSt (centistoke)
- Oil Type: Silicone
- Bearings: Complete set included
- Assembly Status: Factory assembled and pre-filled
- Compatible Scales: 1/7 and 1/8
- Compatible Models: ARRMA Felony 6S, Infraction 6S, Kraton 6S, Notorious 6S, Outcast 6S, Talion 6S, Typhon 6S, Mojave 6S, Limitless 6S and other compatible variants
- Included Components: 1 x Factory Assembled Centre Diff, 46T Steel Spur Gear, 100k cSt Silicone Oil, Complete Bearing Set
Overview
The ARRMA Center Diff Set 46T 100K is an essential replacement component for owners of high-performance 1/7 and 1/8 scale ARRMA RC vehicles. Whether you're driving an ARRMA Felony, Infraction, Kraton, Notorious, Outcast, Talion, Typhon, Mojave or Limitless, this factory-assembled differential set is engineered to deliver reliable handling and durability in demanding conditions. This is a direct factory replacement unit, pre-assembled and pre-filled with 100k cSt silicone oil, making it ideal for efficient servicing and maintenance of your brushless RC car or truck. If you're a serious RC enthusiast in the UK looking to maintain peak performance from your ARRMA model, this centre differential represents a genuine OEM solution backed by the manufacturer's engineering expertise.
Centre differentials are critical components in any 4WD RC vehicle, controlling how power is distributed between the front and rear axles during cornering and acceleration. A worn or damaged centre diff can result in poor handling characteristics, reduced traction, and unpredictable behaviour on track or terrain. This ready-to-fit ARRMA unit eliminates the need for complex rebuilding, saving you time and ensuring your vehicle returns to optimal performance quickly. The 46T steel spur gear and tough internal construction make this set particularly suitable for high-speed driving, extreme bashing, and competitive use where durability under extreme loads is paramount.
ARRMA's commitment to quality manufacturing means this centre diff set is built to the same standards as the original equipment fitted to new vehicles. For RC enthusiasts across the UK seeking authentic spare parts for their ARRMA collection, this is the solution you need to keep your 4WD RC vehicle performing at its best.
Key Features
- Factory Assembled and Pre-filled — This centre diff arrives completely assembled and filled with 100k cSt silicone oil straight from the factory, eliminating the need for complicated rebuilding work and allowing you to install it and get back on the track or field in minutes rather than spending hours on assembly.
- Tough Steel Internal Gears — The internal gearing is manufactured from hardened steel rather than plastic or softer materials, providing long-lasting durability through countless runs in all conditions, whether you're racing at high speeds or bashing over rough terrain.
- Strong Composite Differential Case — The outer case is constructed from reinforced composite material that resists impacts and stress while remaining light enough to not compromise vehicle performance, balancing strength and weight perfectly for 1/7 and 1/8 scale applications.
- 46T Steel Spur Gear — The spur gear is machined from steel with a 46-tooth count, specifically engineered to provide increased durability under extreme loads and high-speed operation, making it ideal for aggressive driving styles and competitive racing where gear stripping is a concern.
- Metal Cross Shafts and Inserts — Rather than plastic components, this set features metal cross shafts and internal inserts that deliver increased efficiency of fit and long-lasting durability, reducing wear and maintaining consistent differential action throughout the life of the component.
- Includes Complete Bearing Set — All necessary bearings are included with this unit, ensuring fast and efficient installation to your vehicle without the need to source additional components or worry about compatibility issues.
Technical Performance
This centre differential set represents ARRMA's proven engineering approach to drivetrain reliability and performance. The combination of steel internal gears and a 46-tooth steel spur gear creates a robust transmission component capable of handling the extreme torque and shock loads produced by modern brushless RC motors in 1/7 and 1/8 scale vehicles. The 100k cSt silicone oil provides the correct viscosity for optimal differential action, allowing smooth power distribution between front and rear axles whilst maintaining resistance to temperature changes and contamination. Metal cross shafts replace weaker plastic equivalents, significantly extending the service life of the differential assembly and reducing the frequency of replacement cycles. The strong composite case construction provides excellent impact resistance whilst maintaining the lightweight characteristics necessary for optimal vehicle balance and handling. This factory-assembled approach means no individual component tolerances or assembly errors — every set that leaves ARRMA's manufacturing facility meets the same exacting standards as the units fitted to brand-new RTR vehicles. Whether you're running a 1/8 Kraton, Notorious, Outcast, Talion or Typhon speed truck, a 1/7 Felony, Infraction, Mojave or Limitless, this centre diff set delivers the performance characteristics you need for consistent, predictable handling in competitive and recreational driving scenarios.
What's in the Box
- 1 x Factory Assembled Centre Diff with 46T Steel Spur Gear
- Pre-filled with 100k cSt Silicone Oil
- Complete Bearing Set for Installation
Frequently Asked Questions
- Which ARRMA RC models is this centre diff compatible with? — This 46T 100K centre diff set is designed as a factory replacement for numerous ARRMA 1/7 and 1/8 scale models including the Felony 6S, Infraction 6S, Kraton 6S, Notorious 6S, Outcast 6S, Talion 6S, Typhon 6S, Mojave 6S and Limitless 6S. Specific compatible model numbers include ARA7617V2, ARA7615V2, ARA8708V6, ARA7604V2, ARA8606V5 and many others. Check the product fitment list on the ARRMA website or with RC Model Shop to confirm compatibility with your specific vehicle variant.
- Why would I need to replace my centre differential? — Centre differentials experience wear over time through normal use and can be damaged through crashes, heavy impacts, or extreme driving conditions. Signs of a worn differential include inconsistent handling, difficulty turning smoothly, grinding noises from the centre of the vehicle, or a sensation of power not being distributed evenly to front and rear wheels. Replacing the unit restores your vehicle to factory performance specifications.
- Is this suitable for high-speed RC driving? — Yes, this centre diff set is specifically engineered for high-speed applications. The 46T steel spur gear and tough internal steel gearing make it particularly suitable for speed trucks and competitive racing where extreme loads and sustained high torque are experienced. The durable construction ensures reliability even when pushing your brushless RC vehicle to its limits.
- Can I fit this myself or do I need professional installation? — This centre diff arrives pre-assembled and pre-filled with silicone oil, making installation significantly simpler than rebuilding a differential from individual components. However, you will need some mechanical knowledge and the correct tools to remove your old differential and install this replacement. If you're not confident with RC vehicle maintenance, RC Model Shop staff can advise on installation or point you towards a local service centre.
- What does 100k cSt silicone oil mean? — The cSt (centistoke) rating refers to the viscosity or thickness of the silicone oil used in the differential. A 100k cSt oil is relatively thick, meaning it provides good resistance to differential action and is suitable for most standard driving conditions and moderate weather. This viscosity is the factory-standard specification for these ARRMA models.
- How often should I replace my centre differential? — Regular centre differentials can last many months of consistent use before requiring replacement, depending on your driving style, maintenance routine and operating conditions. Aggressive racing, frequent crashes and running in wet or sandy conditions may reduce service life. Inspect your differential regularly for damage or wear and replace when you notice handling changes or grinding sounds.
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 Center Diff Set 46T 100K Z-ARA310989 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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