Z-ARA311235

Overview

The ARRMA Center Diff Rebuild Kit Z-ARA311235 is an essential maintenance and repair component for RC enthusiasts who own compatible ARRMA 4WD vehicles. Whether you're a seasoned RC car UK competitor or a weekend basher enjoying your brushless RC truck, the centre differential is one of the most critical components in your drivetrain, and keeping it in perfect working condition is vital for optimal performance and longevity. This precision-engineered rebuild kit provides everything you need to service and restore your centre differential to factory specifications, ensuring smooth power delivery, accurate handling, and reliable 4WD engagement across any terrain.

If you've noticed handling issues, differential noise, or simply want to perform preventative maintenance on your ARRMA ready to run RC vehicle, this centre diff rebuild kit is the perfect solution. Rather than replacing the entire differential assembly, which can be expensive, this comprehensive kit allows you to renew all the critical wear components in one affordable service. The kit is designed for hassle-free installation, making it suitable for both experienced modellers and those new to RC maintenance who want to keep their investment performing at its best.

ARRMA is renowned worldwide for building durable, high-performance RC vehicles, and this official rebuild kit reflects that same commitment to quality. By choosing genuine ARRMA spare parts for your RC hobby, you're ensuring compatibility, reliability, and the genuine performance your vehicle was engineered to deliver. Available now from RC Model Shop, this is the smart choice for keeping your ARRMA 4WD RC truck or buggy running like new.

Key Features

• Precision manufactured components — Every part in this rebuild kit is manufactured to strict ARRMA specifications, ensuring perfect fitment and reliable operation without any gaps, binding, or inconsistency in performance.
• Complete differential service kit — This kit includes all the essential internal components needed to fully service your centre differential, eliminating the need to source parts individually or replace the entire assembly.
• Easy fitment and installation — The kit is designed for straightforward installation, with precision-engineered parts that fit together seamlessly, making the rebuild process quick and stress-free even for modellers with moderate experience.
• Allows easy servicing of centre differential — Rather than being a one-time replacement, this kit enables you to perform regular maintenance and servicing on your centre differential, keeping it in peak condition and extending the life of your drivetrain.
• Genuine ARRMA spare parts — As an official ARRMA component, you're getting authentic parts engineered specifically for ARRMA vehicles, guaranteeing compatibility with your model and maintaining the integrity of your RC car.
• Cost-effective maintenance solution — Rebuilding your differential with this kit is substantially more affordable than replacing the entire differential assembly, making it a smart investment in your RC vehicle's longevity.
• Comprehensive component package — The kit includes multiple ball bearings, washers, O-rings, and a gasket—all the parts that typically wear under normal use and need regular replacement to maintain smooth, quiet differential operation.

Technical Performance

The centre differential is the heart of 4WD performance in your ARRMA RC vehicle, responsible for distributing power between the front and rear axles whilst allowing them to rotate at different speeds during cornering. This rebuild kit addresses all the components within the differential that experience wear and degradation through regular use: the precision ball bearings that enable smooth rotation, the O-rings that provide critical sealing against gear oil leakage, the washers that maintain proper component spacing and alignment, and the gasket that seals the differential housing. The inclusion of two high-quality 15x21x4mm rubber-shielded ball bearings ensures smooth, low-friction operation whilst protecting internal components from contamination. The precision-manufactured 5x8x2.5mm ball bearing and dual 10.2x15x0.5mm washers work together to maintain exact tolerances and proper spacing within the differential assembly. The two 9.8x2.2mm O-rings provide essential sealing to prevent fluid loss and contamination, whilst the centre diff gasket creates a watertight seal between housing halves. By maintaining these components in perfect condition through regular servicing with this kit, you'll preserve the responsive handling, predictable power delivery, and quiet operation that ARRMA vehicles are renowned for across the UK RC community.

What's in the Box

• 2 x 9.8mm x 2.2mm O-Rings
• 1 x 5x8x2.5mm Ball Bearing
• 2 x 10.2x15x0.5mm Washers
• 1 x Centre Diff Gasket
• 2 x 15x21x4mm Rubber Shielded Ball Bearings

Compatibility

This centre differential rebuild kit is compatible with a comprehensive range of current-generation ARRMA 4WD models, including the 1/10 Kraton 4X4 4S V2 BLX Speed Monster Truck RTR, the 1/10 Kraton 4X4 4S V2 BLX Speed Monster Truck RTR in Green, the 1/8 MOJAVE 4X4 4S BLX Desert Truck RTR (available in White and Blue), the 1/10 OUTCAST 4X4 4S V2 BLX Stunt Truck RTR (available in Gunmetal and Red), the 1/10 SENTON 223S BLX Brushless 4X4 Short Course Truck RTR with DSC (available in Red, Yellow, and Blue/Purple), the 1/8 TYPHON 223S BLX 4X4 Buggy RTR with DSC (available in Yellow, Blue, Green, and Red), and the 1/10 VORTEKS 223S BLX 4X4 Stadium Truck RTR with DSC (available in Red, Teal, and Purple). Whether you own a desert truck, monster truck, stunt truck, short course truck, stadium truck, or competition buggy from ARRMA's current range, this kit is engineered to maintain your centre differential perfectly.

Frequently Asked Questions

• When should I service my ARRMA centre differential with this rebuild kit? — ARRMA recommends servicing your centre differential regularly, particularly if you've been running hard on dusty terrain, through water, or noticed any performance changes such as tighter turning, delayed power delivery, or differential noise. As a general guideline, many experienced RC modellers service their differentials every 10-15 hours of running time to maintain optimal performance and prevent wear-related damage.
• Is this suitable for beginners to install? — Yes, the ARRMA Centre Diff Rebuild Kit is designed with precision manufacturing that makes installation straightforward for most modellers. However, because differential service does involve removing the housing and working with small internal components, we recommend beginners either watch video tutorials specific to their model or consult the official ARRMA manual before starting. The kit itself is foolproof—every component is precision-engineered to fit perfectly, so there's minimal chance of error if you follow the correct procedure.
• What tools will I need to use this rebuild kit? — You'll need basic RC modelling tools including a hex wrench set, screwdrivers, and a clean work surface. Depending on your model, you may also need a differential service tool or a gentle heat source to help separate the housing halves. Most ARRMA owners already have these tools as part of their standard RC maintenance kit.
• How often do I need to rebuild my centre differential? — The frequency depends on how heavily you use your RC vehicle. Casual weekend bashers might service their differentials every 15-20 hours, whilst competitive racers or high-use modellers might do it every 8-10 hours. Regular servicing is far more cost-effective than allowing wear to accumulate and damage the differential housing or gears, which would require a complete replacement.
• Will this kit improve my RC truck's handling? — A well-serviced centre differential with fresh seals, bearings, and gasket will absolutely improve handling by ensuring smooth, responsive power delivery and precise weight transfer during cornering. Worn differentials can cause binding, delayed power response, or unpredictable handling characteristics—this kit restores your differential to factory specifications, eliminating those issues.
• Is this a genuine ARRMA product? — Yes, the Z-ARA311235 is an official ARRMA spare part manufactured to ARRMA's exacting standards. When you buy genuine ARRMA components, you're guaranteed compatibility, correct fitment, and the performance characteristics ARRMA engineered into your vehicle.
• What is the difference between this rebuild kit and replacing the entire differential? — A rebuild kit allows you to service and renew the internal wear components (bearings, seals, gasket) whilst keeping your existing differential housing and gears. This is far more economical than purchasing a complete new differential assembly. The rebuild kit approach is perfect for routine maintenance, whilst a complete replacement would only be necessary if the housing or internal gears were damaged.

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 Rebuild Kit Z-ARA311235 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.
• We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
• As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
• 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.