Overview
The ARRMA Limited Slip Center Diff Set 46T 29mm Diff Case (100K) Z-ARA-2812 is a precision-engineered differential upgrade designed for serious RC enthusiasts who demand maximum performance from their ARRMA vehicles. This complete centre differential set combines cutting-edge engineering with robust construction to deliver improved handling, traction control and durability on both track and off-road terrain. Whether you're a competitive racer pushing your RC car UK to its limits or a weekend basher looking to enhance your vehicle's performance, this limited slip differential represents a significant upgrade over stock components and is essential for drivers seeking consistent, predictable handling characteristics.
Limited slip differentials are a critical component in any high-performance RC setup, allowing controlled power distribution between left and right wheels whilst maintaining traction through corners and over varied terrain. The ARRMA 46T 29mm diff case configuration offers the ideal balance between speed and torque multiplication, making it suitable for a wide range of ARRMA models including the flagship LIMITLESS 8S AVC 4WD RTR BLX street speed machine and various KRATON and NOTORIOUS platform vehicles. This is not simply a replacement part—it's a performance enhancement that transforms how your brushless RC truck handles under acceleration, cornering and deceleration.
If you've experienced wheel spin, unpredictable handling or inconsistent performance from your standard open differential, this limited slip centre diff set will immediately demonstrate the advantage of upgrading to precision-engineered drivetrain components. The 100K viscosity specification ensures optimal performance across a range of driving conditions, making this an exceptionally versatile upgrade for UK RC enthusiasts.
Key Features
- Limited Slip Differential Design — This differential actively controls torque distribution between the left and right wheels, preventing excessive wheel spin and providing superior traction compared to standard open differentials. Limited slip operation means your RC vehicle will exit corners faster and maintain more consistent speed through technical sections of track or terrain.
- 46-Tooth Gear Configuration — The 46-tooth spur gear provides an optimised gear ratio that delivers balanced performance characteristics, offering sufficient low-end torque for acceleration whilst maintaining controlled top-speed capabilities suitable for street and off-road applications.
- 29mm Diff Case — This diameter specification ensures compatibility with the full range of modern ARRMA vehicles including the 1/7 scale LIMITLESS and 1/8 scale KRATON and NOTORIOUS models, providing a standardised interface across multiple platform configurations.
- 100K Viscosity Oil Specification — The 100K (100,000 centistoke) viscosity rating indicates the thickness of the differential fluid, with this specification optimising performance across standard driving temperatures and conditions. This viscosity provides the ideal balance between smooth operation and adequate friction for limited slip engagement.
- Precision Engineering and Manufacturing — Each component within this differential set is manufactured to exacting tolerances, ensuring reliable fit within your model and consistent performance lap after lap, race after race, without degradation or wear-related issues.
- Complete Drop-in Assembly — This set includes all necessary components for immediate installation, eliminating the need to source additional parts from multiple suppliers and reducing setup time to get your RC car UK back on the track or terrain.
Technical Performance
The ARRMA Limited Slip Center Diff Set represents the pinnacle of differential engineering for precision RC vehicles. The 46-tooth configuration combined with the 29mm diff case diameter creates a standardised interface compatible with multiple ARRMA platforms, from the high-powered 8S brushless LIMITLESS street speed machines to the rugged 6S KRATON and NOTORIOUS family of RC trucks. The 100K viscosity specification has been specifically selected to provide optimal limited slip engagement characteristics across the temperature ranges typically experienced during RC driving sessions, whether you're conducting summer high-speed runs or winter terrain bashing. Build quality is exceptional throughout, with precision-manufactured components that maintain their performance characteristics indefinitely when properly maintained. The limited slip mechanism activates automatically based on rotational speed differentials between the two output shafts, requiring no driver input whilst providing intuitive, predictable handling improvements that become immediately apparent the first time you accelerate from a standstill or exit a high-speed corner. This differential will dramatically improve traction characteristics on surfaces ranging from asphalt and carpet tracks to loose dirt, gravel and grass terrain, making it an exceptionally versatile upgrade for the serious RC enthusiast.
What's in the Box
- ARRMA Limited Slip Center Diff Set with 46-tooth gear configuration
- Complete differential assembly ready for installation into 29mm diff case equipped vehicles
- Pre-assembled with 100K viscosity specification for optimal performance
Frequently Asked Questions
- What vehicles is the ARRMA Z-ARA-2812 limited slip diff compatible with? — This differential set is compatible with multiple ARRMA models featuring 29mm diff cases, including the 1/7 LIMITLESS 8S AVC 4X4 RTR BLX street speed variants in both red/black and white/blue colour schemes. It is designed to work with any ARRMA vehicle specified with a 29mm differential case interface.
- How does a limited slip differential improve my RC car UK performance compared to the standard open differential? — A limited slip differential actively controls power distribution between the left and right wheels, dramatically reducing wheel spin and improving traction during acceleration, cornering and deceleration. You'll notice immediate improvements in corner exit speed, more consistent lap times, and superior handling predictability across a wider range of driving surfaces and conditions.
- What does the 100K viscosity specification mean? — The 100K (100,000 centistoke) viscosity rating refers to the thickness of the differential fluid used within the assembly. This specification has been optimised by ARRMA engineers to provide reliable limited slip engagement across standard driving temperatures whilst maintaining smooth, responsive operation without excessive friction or binding.
- Is this a complete ready-to-install upgrade? — Yes, this limited slip centre diff set comes fully assembled and ready to install into any compatible ARRMA vehicle equipped with a 29mm diff case. No additional components or preparation is required beyond basic installation into your existing differential housing.
- Will this upgrade improve my brushless RC truck's handling? — Absolutely. Whether you're running a brushless KRATON 6S, NOTORIOUS 6S or the high-power LIMITLESS 8S, this limited slip differential will significantly improve handling consistency, traction control and predictability. The performance improvement is immediately noticeable and becomes even more apparent as you learn to exploit the improved cornering grip and acceleration characteristics.
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 Limited Slip Center Diff Set 46T 29mm Diff Case (100K) Z-ARA-2812 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.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
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- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
