This Metal Diff Set is supplied pre-assembled and ready to drop into your ARRMA vehicle.
Features
- Steel 1.35 module main gear for ultimate durability
- Precision manufactured for accurate tooth mesh
- Tough precision molded composite diff case ensures accurate alignment between gears
- High strength steel straight-cut diff internal gears and splined diff output shafts
- Supplied pre-assembled and ready to drop into the front or rear of your ARRMA model
- Filled with 10,000cSt silicone oil
Includes
1 x Pre-Assembled Metal Diff Set (37T,1.35M)
Requires
#ARA311153
- Brand: ARRMA
- Model Number: Z-ARA311155 (ARRMA Part Number: ARA311155)
- Product Type: Metal Differential Set
- Spare Part Category: Drivetrain/Transmission
- Main Gear Specification: 37 teeth
- Gear Module: 1.35M
- Main Gear Material: Steel
- Main Gear Durability: Ultimate durability rating
- Diff Case Material: Precision molded composite
- Diff Case Design: Ensures accurate alignment between gears
- Internal Gears: High strength steel straight-cut type
- Diff Output Shafts: High strength steel with spline connections
- Pre-Assembly Status: Fully pre-assembled and ready to install
- Silicone Oil Fill: 10,000cSt viscosity
- Installation Position: Compatible with front or rear differential mounting
- Precision Manufacturing: Designed for accurate tooth mesh
- Compatible Vehicles: Big Rock 223S, Big Rock 3S, Granite 223S, Granite 3S, Granite 4X4, Granite Boost 2WD, Granite MEGA 665, Kraton 4S, Outcast 4S, Senton 223S DSC, Senton 3S, Senton 4X4, Senton Boost 2WD, Vorteks 223S, Vorteks 3S, Vorteks Boost 2WD, Infraction 223S DSC, Infraction 3S, Infraction 4X4, Mojave 4S, Typhon 3S, Typhon 4X4, Typhon MEGA 665, Vendetta 3S
- Mounting Interface: Requires ARA311153 compatibility
- Contents: 1 x Pre-Assembled Metal Diff Set (37T, 1.35M)
- Additional Requirement: ARA311153 mounting interface needed
- EAN Code: 5052127044295
Overview
The ARRMA Metal Diff Set (37T, 1.35M) is a premium drivetrain upgrade designed for serious RC enthusiasts who demand ultimate durability and performance from their high-performance RC cars. This pre-assembled differential set is engineered to handle the extreme forces generated by brushless RC trucks, buggies and stunt vehicles, making it an essential upgrade for anyone running an ARRMA 1/10 or 1/8 scale model. Whether you're a weekend basher pushing your RC car UK to the limits, a competitive racer, or an experienced hobbyist, this metal differential delivers the robust construction and precision engineering that separates premium RC spare parts from basic alternatives.
Supplied completely pre-assembled and ready to drop straight into your ARRMA vehicle, this Metal Diff Set eliminates the need for complex assembly and allows you to get back to the track or trail immediately. The 37-tooth configuration with 1.35 module gearing provides optimal torque distribution and acceleration characteristics across a wide range of ARRMA models, from the legendary Kraton 4S speed truck to the versatile Outcast stunt truck and the high-performance Granite monster truck platform. This differential is filled with premium 10,000cSt silicone oil straight from the factory, ensuring smooth operation and consistent performance from the moment you install it.
For UK RC enthusiasts seeking maximum durability and ready-to-run convenience, this ARRMA Metal Diff Set represents an intelligent investment in your RC hobby. The combination of steel construction, precision manufacturing and expert assembly means you're purchasing a component that will withstand repeated high-power runs, jumps and aggressive driving without compromise.
Key Features
- Steel 1.35 Module Main Gear — The primary gear is manufactured from hardened steel rather than composite or plastic, providing ultimate durability and resistance to stripping under extreme torque loads. This heavy-duty construction is essential when running brushless systems that generate enormous power, as it ensures your differential will survive countless aggressive runs without gear wear or tooth damage.
- Precision Manufactured for Accurate Tooth Mesh — Every gear tooth is machined to exact specifications, ensuring perfect engagement between the pinion and main gear. This precision means smoother power delivery, reduced drivetrain vibration, and more efficient power transfer from your motor to the wheels, translating directly into better acceleration and more consistent handling characteristics during competitive runs.
- Tough Precision Molded Composite Diff Case — The differential housing is manufactured using precision injection moulding techniques with premium composite materials that ensure accurate alignment between all internal gears. This precision alignment is critical because even tiny variations in gear spacing can cause noise, vibration and accelerated wear; the robust case design keeps everything perfectly positioned regardless of impact forces or cornering loads.
- High Strength Steel Straight-Cut Diff Internal Gears — The internal gearing within the differential is constructed from hardened steel and features straight-cut tooth profiles that provide superior strength compared to spiral-cut alternatives. These internal gears handle the complex job of splitting torque between the two wheels while allowing speed differentiation during turns, and the steel construction ensures they'll perform flawlessly even under extreme racing conditions.
- Splined Diff Output Shafts — The output shafts that connect the differential to your RC car's drivetrain feature high-strength splined connections rather than simple press-fits. This design distributes load across multiple contact points, dramatically increasing the torque capacity and eliminating the risk of shaft slippage under hard acceleration or during aggressive manoeuvres.
- Supplied Pre-Assembled and Ready to Drop In — Complete assembly is already finished at the factory, meaning you receive a fully functional differential that requires no complex setup, no gear meshing adjustments, and no specialist tools. Whether you're upgrading the front or rear differential on your ARRMA model, simply install it and you're ready to drive; this convenience is invaluable when you want to maximise your track or trail time.
- Pre-Filled with 10,000cSt Silicone Oil — The differential arrives filled with premium silicone oil at the exact viscosity required for optimal performance. This thick oil provides crucial cushioning between the gears, reduces friction losses, and helps dissipate heat generated during aggressive driving; replacing worn oil with this factory-spec fluid restores your differential to like-new performance characteristics.
Technical Performance
The ARRMA Metal Diff Set represents engineering excellence in RC drivetrain design. The 37-tooth main gear with 1.35 module pitch delivers a perfect balance between torque and rotational speed, making it compatible with everything from stock brushless builds to heavily modified competitive setups. The steel construction throughout the differential—main gear, internal gears, and output shafts—creates a component that can sustain repeated exposure to high-torque brushless motors without the performance degradation or catastrophic failures that plague cheaper composite alternatives. The precision manufacturing of every gear tooth ensures minimal backlash and maximum efficiency, translating to faster acceleration and more direct steering response. The composite diff case maintains perfect geometric alignment of all internal components, a critical requirement because even microscopic variations in gear spacing amplify vibration and accelerate wear. The 10,000cSt silicone oil filling provides the precise viscosity balance needed to cushion gear impacts, cool internal components during extended runs, and maintain consistent performance across varying ambient temperatures—essential when you're pushing your brushless RC truck UK to competition-level speeds. This differential is engineered to handle the brutal forces generated by modern brushless systems running high-discharge LiPo batteries, making it the specification choice for serious racers and aggressive bashers alike.
What's in the Box
- 1 x Pre-Assembled Metal Diff Set (37T, 1.35M) filled with 10,000cSt silicone oil
What You Need to Complete
- ARRMA Vehicle compatible with ARA311153 mounting interface
- Phillips head screwdriver for installation
Frequently Asked Questions
- Which ARRMA models is this Metal Diff Set compatible with? — This 37T 1.35 module differential is compatible with a comprehensive range of ARRMA 1/10 and 1/8 scale vehicles including the Kraton 4S speed truck, Outcast 4S stunt truck, Granite monster trucks (223S and 3S versions), Senton short course trucks, Vorteks stadium trucks, Big Rock monster trucks, Typhon buggies, Infraction all-road street bash trucks, Mojave desert truck, and Vendetta all-road street bash. It can be installed in either the front or rear differential position depending on your setup requirements.
- Why would I need to upgrade to a metal differential on my ARRMA RC car? — Stock composite differentials are engineered as cost-effective solutions suitable for casual driving, but they lack the durability needed for serious racing, high-performance bashing, or extended track sessions with brushless motors. A metal differential like this one provides dramatically superior strength, eliminating the risk of gear stripping, case fracture, or shaft failure during aggressive driving. If you've experienced differential problems with your ARRMA model, or if you run brushless power regularly, upgrading to this metal differential is one of the most worthwhile investments you can make in your RC car's reliability and longevity.
- Is this differential pre-assembled or do I need to build it? — This differential arrives completely pre-assembled from the ARRMA factory and filled with the correct 10,000cSt silicone oil. You simply need to remove it from the packaging and install it into your ARRMA vehicle using the existing mounting holes. No gear meshing adjustments, no oil filling, and no specialist tools are required—it's ready to drive immediately, making this an ideal upgrade for anyone wanting maximum performance without complex installation procedures.
- What's the difference between this 37T 1.35M differential and other ARRMA differential options? — ARRMA manufactures differentials in various tooth counts and module sizes to suit different vehicle types and driving styles. This 37-tooth 1.35 module configuration is specifically optimised for high-performance applications and delivers the ideal balance of torque capacity and rotational speed for brushless-powered ARRMA trucks and buggies. The steel construction of this Metal Diff Set provides superior durability compared to any composite alternative, making it the preferred choice when maximum strength and reliability are priorities.
- Does this differential come with silicone oil, or do I need to fill it separately? — This differential is pre-filled at the factory with premium 10,000cSt silicone oil, which is the exact viscosity specified for ARRMA differentials. The pre-fill means you can install and drive immediately without any additional maintenance or setup; when you eventually need to service the differential after extended use, you simply drain the used oil and refill with fresh 10,000cSt silicone oil using a standard applicator bottle.
- Can I use this differential on the front and rear of my ARRMA vehicle? — Yes, this Metal Diff Set is designed as a universal component compatible with both front and rear differential positions on compatible ARRMA models. Whether you're upgrading just the front, just the rear, or both positions, this differential performs identically in each location and provides the same premium durability and performance characteristics.
- What mounting interface does this differential require? — This Metal Diff Set requires the ARRMA ARA311153 mounting interface, which is featured on all listed compatible models. When you're checking compatibility with your specific ARRMA vehicle, simply verify that it accepts the ARA311153 differential assembly, and this Metal Diff Set will install perfectly using your existing suspension and drivetrain structure.
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 Metal Diff Set (37T, 1.35M) Z-ARA311155 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.
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