Overview
The ARRMA 4X2 to 4X4 Transmission Conversion Upgrade Set (G-ARA210003), commonly known as the BOOST BOX, is the ultimate upgrade for ARRMA BOOST 2WD owners who want to unlock the full potential of their RC monster truck. If you've been enjoying your 4x2 BOOST vehicle and are ready to take performance to the next level, this transmission conversion kit transforms your 2-wheel drive machine into a genuine 4-wheel drive powerhouse in just three simple steps. Whether you're a weekend basher exploring off-road terrain across the UK or a dedicated RC enthusiast looking to maximise traction and handling, this upgrade delivers the extra grip you need for serious performance gains.
Designed by ARRMA engineers and fully compatible with GRANITE, SENTON, and VORTEKS BOOST models, this conversion kit includes every component required to complete the transformation. The beauty of this upgrade lies in its simplicity—no specialist tools or mechanical expertise required. ARRMA's signature easy-access modular design means you can swap components quickly and efficiently, a hallmark of ARRMA RC vehicles that makes maintenance and upgrades straightforward for both beginners and experienced RC car UK enthusiasts alike. This is the perfect investment if you want to extend the lifespan of your ready to run RC truck whilst dramatically improving its capabilities.
The kit arrives with comprehensive instructions that walk you through each stage of the conversion process, ensuring that even first-time upgraders can complete the transformation with confidence. Once installed, you'll immediately notice the difference that 4-wheel drive makes—improved traction in wet conditions, better cornering grip, enhanced stability over rough terrain, and the ability to tackle challenging surfaces that would challenge a 2WD vehicle. This is not just an upgrade; it's a complete reimagining of what your BOOST vehicle can achieve.
Key Features
- Complete 4x4 Conversion Kit — This upgrade set contains absolutely everything you need to convert your existing ARRMA 4x2 BOOST vehicle to full 4-wheel drive, eliminating the need to purchase additional components separately and saving you money compared to buying a new 4x4 model outright.
- Universal Joint Front Slider Driveshafts (×2) — These heavy-duty driveshafts feature universal joint technology that allows for smooth power delivery to the front wheels whilst accommodating suspension movement, ensuring consistent traction even when the chassis flexes during aggressive off-road use.
- Assembled Composite Differential — The pre-assembled differential unit is ready to install immediately out of the box, saving you assembly time and ensuring proper gear meshing from the start; the composite construction balances strength with weight efficiency for optimal performance.
- Hybrid Aluminium and Composite Input Gear — This intelligently engineered input gear combines the durability and strength of aluminium with the lightweight advantages of composite materials, creating a component that resists wear whilst keeping rotational mass to a minimum for responsive acceleration.
- Model-Specific Driveshafts — The kit includes both a short centre driveshaft designed for GRANITE and VORTEKS BOOST models and a long centre driveshaft for SENTON BOOST models, ensuring perfect fitment and alignment regardless of your specific vehicle platform.
- Differential Yoke — This precision-engineered component connects the centre driveshaft to the rear differential assembly, providing a secure and reliable connection that maintains power delivery consistency throughout your driving sessions.
- Complete Instruction Sheet — Clear, step-by-step instructions guide you through the three-stage conversion process, with helpful diagrams and explanations that make the upgrade accessible to RC hobbyists of all skill levels across the UK and beyond.
- ARRMA 4x4 Decal Sheet — Celebrate your upgrade with authentic ARRMA branding decals that personalise your vehicle and clearly identify it as a 4x4 BOOST machine, adding visual flair whilst marking your commitment to enhanced performance.
- Quick Installation Process — The entire conversion can be completed in approximately ten minutes thanks to ARRMA's modular design philosophy, meaning you can transition from 2WD to 4WD in a single lunch break or between weekend bashing sessions.
- Drop-In Compatibility — Designed specifically for ARRMA GRANITE, SENTON, and VORTEKS BOOST platforms, this kit integrates seamlessly with your existing vehicle without requiring modifications to the chassis, suspension, or electronics, preserving the integrity of your original setup.
Technical Performance
The ARRMA 4X2 to 4X4 Transmission Conversion Upgrade Set represents sophisticated engineering designed to maximise the capabilities of your brushless-ready BOOST platform. The transmission system utilises a metal gear differential that's already proven in ARRMA's 4x4 models, providing reliable power distribution to all four wheels with the same durability characteristics that have made ARRMA a trusted name in UK RC hobbyist circles. The hybrid aluminium and composite input gear offers the perfect balance between strength and responsiveness—aluminium components resist the kind of wear that comes from continuous meshing with the spur gear, whilst the composite elements keep overall mass down so your vehicle accelerates more eagerly. The dual universal joint front slider driveshafts allow your suspension to move independently whilst maintaining consistent power delivery, a critical engineering feature that prevents binding and ensures smooth handling over bumpy terrain. Once installed, your vehicle will benefit from improved traction across all surfaces—from dirt and grass to parking lots and tarmac—as power is now distributed to all four wheels rather than just two. The assembled composite differential comes pre-configured and ready for immediate installation, eliminating the need for complicated assembly procedures and ensuring proper gear tooth engagement from your first drive. The entire system integrates with your existing MEGA brushed motor or upgraded brushless power system without any compatibility issues, making this one of the most straightforward upgrades available for the ready to run RC truck market in the UK today. Whether you're running 2S LiPo power or considering a future brushless upgrade, the 4x4 transmission system scales perfectly with whatever power system you choose, ensuring your investment in this kit will serve you well for years of weekend bashing and off-road adventures.
What's in the Box
- 1 × Instruction Sheet with detailed conversion steps
- 1 × ARRMA 4x4 Decal Sheet
- 2 × Universal Joint front slider driveshafts
- 1 × Assembled composite differential
- 1 × Differential Yoke
- 1 × Hybrid Aluminium and Composite Input Gear
- 1 × Short Centre Driveshaft (suited to GRANITE and VORTEKS 4x2 BOOST models)
- 1 × Long Centre Driveshaft (suited to SENTON 4x2 BOOST models)
What You Need to Complete
- One ARRMA GRANITE, SENTON, or VORTEKS BOOST 4x2 model (the vehicle you're upgrading)
- Basic RC tools for component removal and installation (typically included with most ARRMA vehicles or available separately)
Frequently Asked Questions
- Can I use this 4x4 transmission conversion upgrade with any ARRMA BOOST model? — This kit is specifically designed for ARRMA GRANITE, SENTON, and VORTEKS BOOST 4x2 models. The kit includes both short and long centre driveshafts to accommodate the different chassis lengths of these three platforms, so you'll have the correct component for your specific vehicle regardless of which BOOST model you own.
- How long does the 4x2 to 4x4 conversion actually take to complete? — ARRMA's engineering data confirms the entire conversion can be completed in approximately ten minutes through three simple steps, thanks to the signature ARRMA easy-access modular design that puts all key components within reach and eliminates the need for complex disassembly procedures.
- Will this upgrade work with my existing MEGA brushed motor and electronics? — Yes, the transmission conversion kit is fully compatible with your existing MEGA 550 brushed motor, ESC, receiver, and servo—no electrical components need to be changed or upgraded to enjoy the benefits of 4x4 traction.
- Can I upgrade to a brushless motor after installing this transmission kit? — Absolutely—your BOOST vehicle is brushless-ready from the factory, and the 4x4 transmission system works perfectly with brushless motor upgrades, so you can add brushless power at any point in the future without needing to modify the transmission.
- Is this suitable for beginners upgrading their first RC monster truck? — This is an excellent upgrade for beginners because ARRMA's modular design makes the installation process straightforward and the included instruction sheet guides you through each stage; the upgrade significantly improves traction and handling, making your vehicle easier to control in a wider variety of terrain conditions.
- What is the difference between a 4x2 and 4x4 BOOST vehicle? — A 4x2 vehicle sends power only to the rear wheels, whilst a 4x4 sends power to all four wheels, providing considerably better traction, particularly in soft terrain like sand or mud, and improved cornering grip because the front wheels can contribute to acceleration rather than relying solely on steering.
- Do I need any special tools to install this transmission conversion kit? — The modular design of ARRMA BOOST vehicles means the conversion requires only basic RC tools—the kind typically included with most ARRMA vehicles or widely available from UK RC retailers; no specialist equipment or advanced mechanical knowledge is necessary.
- Will upgrading to 4x4 significantly affect my vehicle's speed? — The 4x4 transmission adds minimal weight and uses the same gear ratios as the 2WD system, so top speed remains largely unchanged; however, you'll experience much better acceleration grip and improved ability to actually utilise the available power across different terrain types.
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 4X2 to 4X4 Transmission Conversion Upgrade Set: BOOST BOX G-ARA210003 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.
