FZCSZ641

Overview

The FONZON 41T Full Metal Split Centre Differential represents premium engineering designed specifically for ARRMA 6S RC vehicles, delivering exceptional drivetrain reliability and smooth power distribution under the most demanding conditions. Whether you're a weekend basher pushing your RC car UK to its limits or a serious racer seeking bulletproof durability, this centre differential upgrade transforms your vehicle's performance characteristics and ensures confidence in extreme terrain. The 41T gear ratio is the lowest in the current FONZON product line, engineered for drivers pursuing maximum top speed on high-grip surfaces and paved tracks—making it the ultimate choice for racing extreme tuning setups.

Manufactured by Method RC under the FONZON brand, this centre differential combines premium materials with precision CNC-machining to deliver pro-grade drivetrain stability that's ready to run straight out of the box. Unlike plastic differentials that wear and flex under load, this full metal construction maintains consistent performance lap after lap, season after season. If you're serious about upgrading your ARRMA 6S platform—whether you own a Kraton, Outcast, Notorious, Talion, Mojave, Infraction, Felony, Fireteam or Typhon—this is the component that will elevate your RC experience from good to exceptional.

Every FONZON centre differential arrives pre-filled with 100K cSt differential oil and includes LSD clutch plate sets for optional tuning, giving you factory-fresh performance without requiring additional setup before your first run. The engineering philosophy behind this unit prioritises durability, precision, and reliability—qualities that serious RC enthusiasts across the UK demand when investing in their machines.

Key Features

• Fully CNC-machined nickel-chromium alloy steel gears (#4340 steel makeup) — The gears are precision-engineered from premium alloy steel, delivering superior strength and exceptional wear resistance compared to standard plastic differentials, ensuring your drivetrain maintains performance consistency even during intense bashing or racing sessions on the most challenging terrain.
• 7075-T6 aluminium centre housing with finely polished finish — The centre housing is manufactured from aerospace-grade 7075-T6 aluminium, which provides lightweight rigidity without sacrificing strength, whilst the polished finish adds a professional appearance that reflects the quality engineering throughout the entire assembly.
• Extended +1.5mm nickel-chromium steel drive cups — These optimised drive cups are specifically engineered to reduce drivetrain angle stress, protecting your driveshafts and CVDs from premature wear whilst maintaining smooth, efficient power delivery through the drivetrain under full throttle conditions.
• Grade 12.9 titanium-coated screws with corrosion-resistant gold finish — Every fastener is precision-graded and titanium-coated to resist corrosion and provide superior holding power, ensuring your differential assembly remains secure whether you're bashing muddy terrain or running in wet British weather conditions.
• Sealed high-performance adapter cup bearings — These bearings ensure smooth, efficient rotation with minimal friction loss, maintaining responsiveness and delivering consistent power distribution throughout your RC car UK driving experience.
• Pre-filled with 100K cSt differential oil — The unit arrives ready to run out of the box with professional-grade differential oil already installed, eliminating guesswork and ensuring optimal performance from your first drive without requiring additional preparation or servicing.
• Includes LSD (Limited Slip Differential) clutch plate set — The optional clutch plates enable enhanced traction control tuning, allowing you to fine-tune the differential response to match your driving style, terrain preference, and vehicle setup without purchasing additional components.
• Designed for maximum top speed configurations — The 41T gear ratio is specifically engineered for drivers pursuing the highest possible top speed on high-grip surfaces and paved tracks, making it ideal for racing setups that prioritise speed over low-end torque and acceleration.
• Direct fit for entire ARRMA 6S platform — This centre differential is engineered as a direct replacement for all ARRMA 6S models, including Kraton 6S, Outcast 6S, Notorious 6S, Talion 6S, Mojave 6S, Infraction/Felony 6S, Fireteam 6S, and Typhon 6S, ensuring seamless compatibility and installation.

Technical Performance

The FONZON 41T Centre Differential represents the pinnacle of drivetrain engineering for serious RC enthusiasts seeking to upgrade their ARRMA 6S vehicles. Machined entirely from premium materials, this full metal construction delivers dramatically superior performance compared to standard plastic differentials. The #4340 nickel-chromium alloy steel gears provide exceptional hardness and wear resistance, maintaining their precision geometry even after countless hours of high-speed running or aggressive bashing. The 7075-T6 aluminium centre housing offers an ideal balance of lightweight construction and rigid support, preventing flex and distortion that compromises performance. Every component, from the titanium-coated Grade 12.9 fasteners to the sealed high-performance adapter cup bearings, has been engineered to withstand extreme loads and repetitive stress cycles. The 41T gear ratio represents the lowest ratio currently available in the FONZON range, specifically calibrated for maximum top speed applications on high-grip paved tracks and competitive racing environments. This ratio demands high-RPM motors and forced cooling systems, requiring careful vehicle setup and tuning to realise its full potential. The extended +1.5mm nickel-chromium steel drive cups reduce drivetrain angle stress, protecting vulnerable components and extending the service life of your entire drivetrain system. Pre-filled with premium 100K cSt differential oil, this unit is engineered to provide optimal viscosity and lubrication characteristics for smooth operation and maximum efficiency across a wide range of driving conditions and temperatures.

What's in the Box

• FONZON 41T Full Metal Split Centre Differential assembly (complete and assembled)
• Pre-filled with 100K cSt differential oil
• LSD (Limited Slip Differential) clutch plate set for optional tuning

Frequently Asked Questions

• Is the FONZON 41T centre differential suitable for beginners or weekend bashers? — Whilst the FONZON 41T delivers exceptional build quality and durability that benefits all skill levels, the 41T gear ratio is specifically engineered for maximum top speed on high-grip surfaces and paved tracks. Beginners and casual bashers might prefer higher tooth-count options like the 43T, 46T, 50T, or 52T ratios if they run predominantly on loose terrain or are still developing their driving skills. The 41T requires proper vehicle setup, high-RPM motors, and forced cooling systems to perform optimally.
• What is the difference between the 41T and other available FONZON centre differential ratios? — The FONZON centre differential range offers multiple gear ratios to suit different driving styles and terrain types. The 41T is the lowest ratio in the current line, optimised exclusively for maximum top speed on competitive racing surfaces. Higher ratios like the 43T, 46T, 50T, and 52T provide progressively more low-end torque and acceleration, making them more versatile for varied terrain and bashing applications. Choose your ratio based on your primary driving environment and performance goals.
• What vehicles does the FONZON 41T centre differential fit? — This centre differential is engineered as a direct-fit upgrade for the entire ARRMA 6S platform, including the Kraton 6S, Outcast 6S, Notorious 6S, Talion 6S, Mojave 6S, Infraction 6S, Felony 6S, Fireteam 6S, and Typhon 6S. Always verify your specific vehicle's part number requirements before ordering to ensure perfect compatibility.
• Does the FONZON 41T come ready to install, or do I need to do any setup? — This centre differential arrives fully assembled and pre-filled with premium 100K cSt differential oil, meaning it's ready to install directly into your ARRMA 6S vehicle without any additional preparation, servicing, or break-in requirements. Installation requires only basic RC car maintenance skills and standard tools.
• What does the included LSD clutch plate set do? — The Limited Slip Differential clutch plates enable advanced traction control tuning, allowing you to adjust how much slip occurs between the front and rear axles under acceleration and cornering. This permits fine-tuning to match your specific driving style, terrain conditions, and vehicle setup without purchasing additional components separately.
• Why choose a full metal differential over the standard plastic differential? — Full metal construction delivers superior strength, wear resistance, and durability compared to plastic differentials. Metal gears maintain their precision geometry through countless drive cycles, ensuring consistent performance and reliability. This is particularly important when running high-power motors, bashing extreme terrain, or competing in racing environments where durability directly impacts performance.
• What is differential oil viscosity and why does the 100K cSt specification matter? — Differential oil viscosity determines how much resistance the oil provides to internal gears and clutch plates. The 100K cSt (centistoke) specification represents a premium viscosity grade that provides optimal lubrication and friction characteristics for smooth power distribution and efficient operation. Higher viscosity oils (thicker) provide more friction and stability, whilst lower viscosity oils (thinner) enable faster response but less stability.

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 FONZON 41T FULL METAL SPLIT CENTRE DIFF - ARRMA 6S SERIES FZCSZ641 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.