Overview
The ARRMA Main Diff Gear, 42T GP5 Z-ARA311017 is an essential replacement component for RC enthusiasts maintaining their ARRMA vehicles. Whether you're a seasoned RC car UK competitor or a weekend basher looking to keep your model in peak condition, this genuine ARRMA differential gear is the perfect spare part to have on hand. Differential gears are critical components in any RC vehicle, responsible for distributing power between the wheels whilst allowing them to rotate at different speeds during cornering. When your current gear shows signs of wear or damage, upgrading to a fresh ARRMA Main Diff Gear ensures smooth handling, improved traction and consistent performance across all terrains.
This 42-tooth gear is specifically engineered for use with ARRMA's GP5 differential system, making it the ideal replacement for owners of compatible ARRMA models. Whether you're preparing for a competitive event or simply maintaining your beloved basher, having genuine OEM parts ensures you're getting authentic ARRMA engineering and reliability. RC car maintenance and upgrades are essential to keeping your vehicle running smoothly, and quality replacement gears like this one are fundamental to that process. The 42T configuration offers a balanced approach to differential performance, suitable for a wide range of driving styles and conditions.
RC Model Shop stocks this part as part of our comprehensive range of ARRMA spares and tune-ups. As an authorised ARRMA retailer, we guarantee the authenticity and quality of every component we sell, giving you complete confidence that you're purchasing a genuine part that will perform exactly as intended when fitted to your RC model.
Key Features
- 42-Tooth Gear Configuration — This specific tooth count is engineered to provide balanced differential performance, allowing optimal power distribution between your RC vehicle's wheels whilst enabling smooth cornering and predictable handling characteristics in both high-grip and low-grip driving conditions.
- GP5 Differential Compatibility — Designed specifically for use within ARRMA's GP5 differential system, this gear ensures perfect fit, optimal meshing and reliable performance when installed in compatible ARRMA vehicles, eliminating compatibility concerns and ensuring seamless installation.
- Genuine ARRMA Manufacturing — This is an authentic OEM ARRMA component engineered to the exact specifications of the original equipment, guaranteeing that you receive a part built to withstand the demands of aggressive RC driving whilst maintaining the performance standards ARRMA is known for.
- Essential Maintenance Component — Differential gears are high-wear items that endure constant rotational stress during driving, making this replacement gear an essential spare to have available for vehicle maintenance, repair or upgrade as part of your RC spares collection.
- Direct Fit Replacement — As an OEM ARRMA part with the exact model number Z-ARA311017, this gear is engineered to be a direct replacement, meaning it requires no modification, adjustment or additional parts to install correctly into your ARRMA differential system.
Technical Performance
The ARRMA Main Diff Gear, 42T GP5 Z-ARA311017 is manufactured to exacting tolerances that ensure smooth meshing with the pinion gear within your differential assembly. The 42-tooth configuration represents a balanced ratio that works effectively across a spectrum of driving scenarios, from casual backyard bashing to more spirited off-road running. Differential gears must be precisely engineered with optimal tooth profiles to minimise backlash, reduce noise and ensure efficient power transfer from your motor through to your wheels. The GP5 differential system is ARRMA's proven platform for managing torque distribution, and this 42T gear is calibrated to work in perfect harmony with that system. Quality materials and precision manufacturing are essential in differential components because they experience continuous rotational forces and must withstand the stress of acceleration, cornering and terrain changes. When a differential gear becomes worn, damaged or chipped, it can cause vibration, noise, traction loss and uneven power delivery. Installing a fresh ARRMA Main Diff Gear restores your vehicle's handling characteristics and ensures the differential operates as originally designed, providing smooth power distribution and predictable vehicle behaviour.
What's in the Box
- 1 x ARRMA Main Diff Gear, 42T (GP5)
Frequently Asked Questions
- What is a differential gear and why do I need a replacement? — The differential gear is a critical component within your RC vehicle's differential system that distributes engine power between the wheels whilst allowing them to rotate at different speeds during cornering. Over time, through regular use and aggressive driving, these gears can become worn, stripped or damaged, causing handling issues and reduced performance. A replacement 42T ARRMA Main Diff Gear restores original performance and handling characteristics to your vehicle.
- Will this 42T gear fit my ARRMA model? — This gear is specifically engineered for ARRMA vehicles equipped with a GP5 differential system. To confirm compatibility with your specific ARRMA model, check your vehicle's manual or contact RC Model Shop for guidance. Our team can help you identify the correct differential components for your particular ARRMA model.
- How often should I replace my differential gear? — Differential gears are wear items that degrade with use, particularly in aggressive driving conditions or on rough terrain. If you notice noise, vibration or traction issues from your differential, or if you can see visible wear or damage to the gear teeth, it's time to replace it. Regular maintenance inspections as part of your RC car maintenance routine can help identify wear before problems develop.
- Is this a genuine ARRMA part? — Yes, this is an authentic OEM ARRMA component with the official ARRMA model number Z-ARA311017. RC Model Shop is an authorised ARRMA retailer, guaranteeing that all parts are genuine and manufactured to ARRMA's exacting standards. Genuine OEM parts ensure perfect fit, compatibility and performance compared to aftermarket alternatives.
- Do I need any special tools to install this gear? — Installation of a differential gear typically requires access to your vehicle's differential assembly and may require removal of other components. You'll need standard RC model tools and some mechanical knowledge. If you're unfamiliar with differential service, we recommend consulting your vehicle's manual or contacting RC Model Shop for installation guidance.
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 Main Diff Gear, 42T GP5 Z-ARA311017 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.
