ARRMA Front & Rear Metal Diff Upgrade Set: BOOST BOX G-ARA210007

Overview

The ARRMA Metal Diff BOOST Box (G-ARA210007) is an essential upgrade for RC enthusiasts looking to unlock the true potential of their ARRMA 4X2 BOOST, MEGA, or 3S basher. This premium transmission upgrade package transforms your RC car's powertrain, allowing you to safely run more powerful motors and achieve higher speeds without compromising durability. Whether you're an experienced RC hobbyist in the UK or someone ready to take their RC experience to the next level, this all-metal differential upgrade is the perfect choice for amplifying your ARRMA vehicle's performance and reliability.

ARRMA has built a reputation for creating all-terrain tough RC vehicles that easily outlast other RC bashers on the market. The Metal Diff BOOST Box continues this legacy by providing the robust transmission components needed to handle the demands of high-powered motors. Rather than settling for plastic differentials that wear out quickly under stress, this upgrade kit equips your RC car with genuine metal gear technology proven to withstand intense driving conditions. It's the ideal solution for anyone who's experienced the frustration of broken plastic components mid-session.

Installation is straightforward and hassle-free, with comprehensive step-by-step guidance available through ARRMA's online assembly video. The package arrives ready to install with all necessary components included, meaning you can have your RC car upgraded and back on the track or terrain within hours. This is genuinely where your RC adventures go beyond casual bashing into serious blasting performance.

Key Features

• All-Metal Front and Rear Differentials — Both the front and rear differentials are constructed entirely from metal rather than plastic, providing exceptional durability and strength for high-performance motorsport applications and aggressive driving styles.
• Full Metal Ring Gears — The ring gears are manufactured from robust metal construction, ensuring they can handle sustained high torque loads from powerful brushless motors without stripping or cracking under pressure.
• Metal Input Gear — The input gear that drives the differential system is reinforced with full metal construction, preventing deformation and wear that commonly occurs with plastic alternatives in demanding RC applications.
• Metal Internal Gears — All internal gears within the differential assembly are fabricated from metal, ensuring smooth power delivery, reduced friction and extended component lifespan compared to plastic-based systems.
• 4S Metal Gear Specification Upgrade — This upgrade brings your 4X2 BOOST, MEGA or 3S basher up to 4S metal gear performance standards, allowing you to safely install more powerful 3S brushless systems and explore higher-powered upgrade paths without transmission failure.
• Ready-to-Install Assembly — Both the front and rear metal gear differentials arrive fully assembled and require no complex rebuilding or tuning, reducing installation time and technical difficulty for RC users of all experience levels.
• Bevel Gear Yokes Included — The package includes two bevel gear yokes, eliminating the need to source additional components separately and ensuring perfect compatibility with your ARRMA basher.
• All Necessary Hardware Provided — Every fastener, bearing and component needed for complete installation is included in the box, so you won't need to hunt for additional parts from other suppliers.
• Online Assembly Guidance — Step-by-step installation video tutorials from ARRMA make the upgrade process simple and accessible, even for users who've never performed transmission work before.
• Bonus ARRMA Decal Sheet — A sheet of colourful ARRMA BOOST decals is included to customise the appearance of your upgraded RC car and celebrate your performance enhancement investment.
• Proven for Higher Performance Motors — This upgrade specifically enables safe use of more powerful motors in your RC basher, addressing the transmission durability bottleneck that prevents casual bashers from reaching their true speed potential.
• Broad Compatibility — Compatible with multiple ARRMA 4X2 MEGA BOOST basher vehicles as well as ARRMA 4X4 MEGA and 3S vehicles, making this a versatile upgrade option for several models in the ARRMA lineup.
• Professional-Grade Durability — The all-metal construction mirrors the durability standards found in serious competition RC vehicles, bringing race-proven engineering to your recreational basher.

Technical Performance

The ARRMA Metal Diff BOOST Box represents a fundamental shift in transmission engineering, moving away from plastic-based differentials that commonly fail under motor load towards a robust all-metal construction philosophy. Every critical component—front differential, rear differential, ring gears, input gear and internal gears—is manufactured from durable metal materials designed to withstand sustained high-torque applications. This engineering upgrade is particularly valuable for RC enthusiasts in the UK who run brushless motor upgrades, as plastic transmissions frequently become the weak link limiting performance acceleration and top-end speed potential. The metal gear construction ensures smooth power delivery with minimal backlash, translating directly to improved handling responsiveness and acceleration consistency across a wider range of driving conditions. The assembled differentials arrive in ready-to-install condition, requiring no disassembly or internal tuning, which simplifies the upgrade process significantly for users of varying technical expertise. The inclusion of bevel gear yokes and all necessary fasteners means installation can proceed without sourcing additional components from alternative retailers. This transmission upgrade specifically addresses the durability constraints of stock ARRMA 4X2 BOOST, MEGA and 3S bashers, enabling safe operation with 3S brushless power systems and more powerful motor options that would otherwise overwhelm plastic transmission components within minutes of aggressive driving.

What's in the Box

• Two fully assembled metal gear differentials (front and rear)
• Two bevel gear yokes
• All necessary installation hardware (fasteners and components)
• ARRMA BOOST Metal Diff Upgrade Product Manual with detailed instructions
• ARRMA BOOST Decal Sheet featuring colourful ARRMA branding

Frequently Asked Questions

• Is the ARRMA Metal Diff BOOST Box suitable for my RC car? — The Metal Diff BOOST Box is specifically designed for ARRMA 4X2 BOOST, MEGA and 3S basher vehicles. It's also compatible with ARRMA 4X4 MEGA and 3S models. Check your vehicle model number against the compatibility list to confirm this upgrade is right for your RC car. If you're unsure of your model, our RC Model Shop team can help identify your vehicle and confirm compatibility.
• Will this upgrade improve my RC car's speed and acceleration? — This upgrade doesn't directly increase top speed, but it enables you to safely install more powerful motors that would otherwise break plastic transmissions. By allowing use of higher-powered brushless systems like 3S configurations, you unlock your vehicle's true speed potential. The improved durability also reduces power loss through transmission slack and improves acceleration consistency.
• How difficult is it to install the Metal Diff BOOST Box upgrade? — Installation is designed to be straightforward for RC users of all experience levels. The differentials arrive fully assembled, and ARRMA provides a comprehensive step-by-step online assembly video guiding you through each stage. All necessary hardware is included, so you won't need additional tools beyond standard RC maintenance equipment. Most users can complete installation within one to two hours.
• Why is metal construction better than plastic differentials? — Metal differentials offer superior durability, resistance to stripping and deformation under high torque loads, reduced wear over extended use and improved power transmission consistency compared to plastic alternatives. When running powerful brushless motors, plastic components commonly fail after brief use periods, whereas metal gears maintain reliable performance session after session. This upgrade essentially future-proofs your transmission investment.
• Can I use this upgrade with stock ARRMA motors or do I need a brushless upgrade? — The Metal Diff BOOST Box is designed to support higher-powered configurations, particularly 3S brushless motor upgrades, though it's fully compatible with stock motor systems as well. The upgrade is most valuable when paired with a brushless motor upgrade, as it allows you to explore the full performance range these systems offer without transmission limitations.
• What motors and power systems work with this upgrade? — The Metal Diff BOOST Box upgrades your vehicle to 4S metal gear specification standards, enabling safe use of 3S brushless power systems and compatible motor configurations. For specific motor recommendations and power system pairings, consult the included manual or contact RC Model Shop's expert team.
• Is this a permanent upgrade or can it be reversed? — This is a permanent upgrade in the sense that once installed, your ARRMA vehicle's transmission architecture shifts to the metal differential standard. However, the original plastic differentials can be reinstalled if desired, though most users find the improved durability and performance benefits make reverting unnecessary.

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 Front & Rear Metal Diff Upgrade Set: BOOST BOX G-ARA210007 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.

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