- Brand: ARRMA
- Model Number: Z-ARA311118
- EAN: 5052127042536
- Part Type: Center Differential
- Differential Type: Centre Diff
- Spur Gear Tooth Count: 50T
- Spur Gear Material: Steel
- Silicone Oil Fill: 200k cSt
- Silicone Oil Type: Silicone Oil (pre-filled)
- Diff Case Material: Aluminium (Red Anodised)
- Internal Gears Material: Steel
- Outdrives Material: Steel
- End Cap Material: Steel
- Cross Shafts Material: Metal
- Cross Shaft Inserts Material: Metal
- Bearings: Included
- Assembly Status: Factory Assembled
- Pre-Filled: Yes
- Installation Type: Pre-assembled replacement unit ready for installation
Overview
The ARRMA Aluminum Center Diff Set, 50T 200K is a factory-assembled replacement differential unit designed for serious RC enthusiasts who demand reliability and durability in their RC car setups. This pre-assembled centre diff comes filled with 200k cSt silicone oil, making it ready for immediate installation without the need for additional servicing or complex assembly. Whether you're running an ARRMA RC vehicle in the UK or abroad, this aluminium centre differential represents a genuine upgrade path for maintaining peak performance or replacing a worn component with confidence.
Built with precision-machined red anodised aluminium construction throughout the diff case, this centre diff combines lightweight efficiency with the strength needed to handle the demands of high-performance RC driving. The robust steel internal gears and outdrives are engineered to withstand extreme loads and challenging conditions, making this an excellent choice for bashers, racers, and weekend warriors alike. If you're serious about keeping your RC car UK-ready and performing at its best, this factory-assembled unit eliminates guesswork and provides immediate reliability.
The 50T steel spur gear provides increased durability under extreme loads, whilst the metal cross shafts and inserts ensure long-lasting durability and efficient power delivery. This is the kind of component that separates casual RC car enthusiasts from those committed to getting the most out of their vehicle's performance and longevity.
Key Features
- Factory Assembled and Pre-Filled — This centre diff arrives completely assembled and filled with 200k cSt silicone oil, meaning you can install it directly into your vehicle without requiring any additional preparation, disassembly, or fluid filling work, saving you valuable time during servicing.
- Precision Machined Red Anodised Aluminium Diff Case — The aluminium construction offers a perfect balance between lightweight design and enhanced durability, with the red anodised finish providing both visual appeal and additional corrosion resistance for use in all UK weather conditions.
- Tough Steel Internal Gears and Outdrives — The internal gearing system is manufactured from hardened steel to deliver long-lasting durability in all conditions, whether you're bashing through mud, racing on concrete, or pushing your RC car to its limits.
- 50T Steel Spur Gear — The large 50-tooth spur gear is engineered from steel for maximum durability and strength, providing increased resistance to wear under extreme loads and delivering reliable performance during intensive driving sessions.
- Strong Steel Diff End Cap — A robust steel end cap secures the differential assembly, providing structural integrity and ensuring all internal components remain properly aligned and sealed during operation.
- Metal Cross Shafts and Inserts — Rather than composite alternatives, this centre diff features metal cross shafts and inserts that deliver increased efficiency of fit and contribute to long-lasting durability and consistent power delivery.
- Included Bearings for Fast Installation — Bearings are supplied as part of the set, enabling quick and efficient fitting to your vehicle without the need to source additional components separately.
Technical Performance
The ARRMA Aluminum Center Diff Set represents serious engineering designed to meet the demanding requirements of RC enthusiasts across the UK. With a 50-tooth steel spur gear and 200k cSt silicone oil fill, this centre differential is engineered to handle the high torque loads generated by modern brushless RC systems whilst maintaining smooth, efficient power distribution. The precision-machined red anodised aluminium case provides structural strength that resists deformation under extreme loads, whilst the steel internal gears and outdrives ensure that wear is minimised across countless hours of operation. The metal cross shafts and inserts deliver superior mechanical efficiency compared to plastic alternatives, reducing binding and ensuring power is transmitted consistently to both drive outputs. This is a component designed not just for initial performance, but for long-term reliability through intensive use in all conditions—mud, dust, tarmac, and grass. The factory assembly and 200k cSt oil fill means it arrives ready to install, eliminating the need for disassembly and maintenance before first use, making it ideal for drivers who want to get on the track or field without delay.
What's in the Box
- 1 x Factory Assembled Center Diff
- Aluminium Diff Case
- 50T Steel Spur Gear
- 200k cSt Silicone Oil (pre-filled)
- Included Bearings
- Steel Internal Gears and Outdrives
- Metal Cross Shafts and Inserts
- Steel Diff End Cap
Frequently Asked Questions
- Is the ARRMA Aluminum Center Diff Set suitable for beginners? — This is a replacement component rather than a complete vehicle or complex assembly project, so installation is straightforward for anyone with basic RC mechanical knowledge. It arrives factory-assembled and pre-filled with oil, meaning you simply need to install it into your vehicle's chassis. If you're experienced enough to be servicing or upgrading your RC car's drivetrain, you have the skills needed to fit this centre diff.
- What does the 200K cSt silicone oil mean? — The 200k cSt refers to the viscosity of the silicone oil that fills the differential. This specification indicates a medium-viscosity oil that provides the correct balance of smooth power delivery and load-carrying capability for high-performance RC cars. The pre-filling means the diff arrives ready to use without additional oil purchases.
- What is the 50T specification? — The 50T refers to the 50-tooth steel spur gear fitted to this centre diff. This is a relatively large gear tooth count that provides durability and strength when handling the torque loads from brushless motors and extreme driving conditions, making it ideal for serious RC enthusiasts rather than basic recreational use.
- Will this centre diff work with my ARRMA RC vehicle? — This is an ARRMA original part designed as a replacement unit for ARRMA vehicles that use this centre differential specification. Always verify that Z-ARA311118 is the correct part number for your specific ARRMA model before ordering to ensure compatibility.
- How long does the pre-filled oil last? — The 200k cSt silicone oil is factory-filled at the point of manufacture. With regular use, centre differential oil may need topping up or replacement after extended periods of intensive driving, depending on your usage patterns and local conditions. The sealed, pre-filled design ensures you can use the diff immediately without maintenance before first use.
- What makes aluminium construction better than plastic? — The precision-machined red anodised aluminium diff case offers superior durability and strength compared to plastic alternatives. Aluminium resists deformation under the extreme loads and impacts common in RC driving, whilst the anodised finish provides additional protection against corrosion in wet UK weather conditions.
- Is this a complete differential assembly? — Yes, this is a fully assembled centre differential unit that includes all internal components, steel gears, metal cross shafts, bearings, and the 50T steel spur gear. It arrives pre-filled with 200k cSt silicone oil and is ready for installation into your ARRMA vehicle.
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 Aluminum Center Diff Set, 50T 200K Z-ARA311118 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:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
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