FZCSGRF02

Overview

The FONZON Full Metal Front Differential with Input Pinion is purpose-built for the ARRMA GROM series, delivering robust power transfer in a compact, lightweight, mini-scale package. This all-metal differential represents a significant upgrade for anyone serious about maintaining drivetrain reliability and performance in their RC car UK setup. Whether you're a weekend basher enjoying high-speed runs or a dedicated enthusiast looking to reinforce your RC buggy's durability, this precision-engineered component is designed with high-strength materials and meticulous assembly to handle the demands of modern RC racing and casual driving alike.

Compact size does not mean compromising on durability. The FONZON differential is engineered specifically for the ARRMA GROM platform, one of the most popular ready to run RC vehicles in the UK market. This upgrade component addresses a critical weak point in many stock RC cars—the differential system. By replacing your factory differential with this all-metal alternative, you gain significantly improved power transfer efficiency, smoother drivetrain operation, and enhanced longevity under high RPM conditions. The differential is the heart of your RC car's drive system, managing power distribution to the wheels and allowing for smooth cornering without binding. A quality differential like this makes the difference between a car that feels sluggish and one that responds instantly to your input.

Whether you're tuning your ARRMA GROM for competitive performance or simply reinforcing the overall reliability of your drivetrain, the FONZON Full Metal Front Differential is ready for the challenge. Supplied fully assembled and pre-filled with differential oil, it's ready for quick installation straight out of the box. No time-consuming assembly or messy oil filling—just quality engineering ready to perform.

Key Features

• Powder Metallurgy Planetary Gears — These gears deliver excellent strength and precision in a compact form factor, ensuring efficient power transfer while maintaining the small profile required for mini-scale RC vehicles. Powder metallurgy construction creates gears with superior dimensional accuracy and strength compared to traditional casting methods.
• 7075-T6 Aluminium Alloy Diff Case — The centre housing is machined from premium 7075-T6 aluminium alloy, which is both lightweight and exceptionally rigid. This aerospace-grade material provides the structural integrity needed to withstand the stresses of high-performance driving whilst keeping overall weight to a minimum, improving your RC car's acceleration and handling characteristics.
• Nickel-Chromium Alloy Steel Drive Cups — These components ensure durability under high RPM conditions, resisting wear and deformation even during extended driving sessions. The nickel-chromium alloy provides superior corrosion resistance and maintains its structural integrity as temperatures rise during aggressive driving.
• Powder Metallurgy Drive Bevel Gear and Ring Gear — Just like the planetary gears, these critical drivetrain components are manufactured using powder metallurgy techniques for consistent torque transfer and reliability. This manufacturing method produces gears with minimal porosity and maximum strength.
• Grade 12.9 Black Corrosion-Resistant Screws — All fasteners are precision-grade screws with black corrosion-resistant coating, ensuring they won't rust or weaken over time, even in damp UK conditions. Grade 12.9 specification means these screws maintain their strength under extreme vibration and load cycles.
• Factory Pre-Filled with 3K cSt Differential Oil — The differential arrives filled with 3000 centistoke differential oil, which provides the perfect balance of lubrication and limited-slip characteristics for the ARRMA GROM platform. You won't need to drain and refill with your own oil—it's ready to use immediately.
• Fully Assembled and Ready to Install — This is not a kit requiring assembly; it comes completely built and tested. The precision assembly has been completed in the factory, meaning you can install it with confidence knowing every component is perfectly aligned and torqued to specification.

Technical Performance

This front differential represents serious engineering investment in materials and manufacturing processes. The combination of powder metallurgy gears, premium 7075-T6 aluminium alloy housing, and nickel-chromium steel components creates a drivetrain system that can handle the rigorous demands of modern RC cars. The 3K cSt differential oil provides the ideal viscosity for the ARRMA GROM scale, offering smooth power delivery whilst maintaining enough drag to allow for controlled cornering without binding or slipping excessively. The Grade 12.9 corrosion-resistant screws ensure that the differential maintains its structural integrity through hundreds of hours of driving, whether you're running in dry UK conditions or after rain has exposed your car to moisture. The nickel-chromium alloy steel drive cups are specifically engineered to withstand the centrifugal forces and temperature spikes that occur during high RPM operation, resisting the wear that would cause play or noise to develop in lesser-quality differentials. This is not a basic plastic component—this is a genuine performance upgrade that will improve the feel, reliability, and longevity of your ARRMA GROM's drivetrain significantly.

What's in the Box

• FONZON Full Metal Front Differential assembly with input pinion
• Pre-filled with 3K cSt differential oil
• Fully assembled and ready to install

Frequently Asked Questions

• Is the FONZON Full Metal Front Differential compatible with my ARRMA GROM? — Yes, this differential is specifically designed for the ARRMA GROM series and all variants within that platform. Whether you own an ARRMA Granite GROM, Typhon GROM, Mojave GROM, or Gorgon GROM, this front differential will fit and function perfectly.
• Why would I need to upgrade my differential on an RC car UK? — The differential is a critical component in your RC car's drivetrain that manages power distribution and allows for smooth cornering. Stock differentials on many ready to run RC vehicles are made from plastic and can wear, slip, or bind over time. Upgrading to an all-metal differential like this one improves power transfer efficiency, reduces noise, extends drivetrain life, and provides more predictable handling characteristics, especially during aggressive cornering.
• Do I need to fill this differential with oil myself? — No, the FONZON differential comes factory pre-filled with 3K cSt differential oil, so you can install it and start driving immediately without any additional preparation or maintenance steps. This saves time and ensures the correct oil viscosity has been used.
• What is the advantage of powder metallurgy gears over plastic? — Powder metallurgy is a manufacturing process that creates metal components with superior strength, dimensional accuracy, and consistency compared to plastic moulding. These gears can handle higher torque loads, won't deform under heat, and maintain their precise tooth geometry even after thousands of operating hours, resulting in smoother, quieter, and more efficient power transfer.
• Will this differential improve my RC car's speed? — While the differential itself doesn't directly increase top speed, it significantly improves acceleration and handling by ensuring efficient, smooth power delivery to the wheels. A quality differential reduces parasitic drag in the drivetrain and allows better traction control during acceleration and cornering, which translates to faster lap times and better overall performance.
• How long will this differential last? — The all-metal construction, premium materials, and precision assembly mean this differential will outlast multiple plastic alternatives. With proper maintenance (occasional oil top-ups if needed), you can expect hundreds of hours of reliable service, making it a worthwhile long-term investment in your RC car UK.
• Is this suitable for beginners? — This is an upgrade component best suited for users who already have an ARRMA GROM and are looking to improve its performance and reliability. It's not required for casual driving but is highly recommended for anyone planning extended use, competitive driving, or who wants maximum drivetrain durability.

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 FULL METAL FRONT DIFF WITH INPUT PINION ARRMA GROM FZCSGRF02 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.