This Metal Gear F/R Transmission Module Set is supplied pre-assembled and ready to drop into your ARRMA vehicle.
Features
- Steel input and main diff gears are precision manufactured for accurate tooth mesh
- 1.35 module input and main gear tooth profile for ultimate durability
- Tough precision molded composite diff case and diff module yoke ensures accurate alignment between gears
- High strength steel straight-cut diff internal gears and splined diff output shafts
- Filled with 10,000cSt silicone oil
- Supplied pre-assembled and ready to drop into the front or rear of your ARRMA mode
Includes
1 x Pre-Assembled Metal Gear F/R Transmission Module Set (37T/13T,1.35M)
- Product Type: Metal Gear F/R Transmission Module Set
- Manufacturer: ARRMA
- Part Number: Z-ARA311156
- ARRMA Model Number: ARA311156
- EAN: 5052127044288
- Scale Compatibility: 1/10 and 1/8 scale
- Gear Ratio: 37T/13T
- Module Specification: 1.35M (1.35 module)
- Input Gear Teeth: 13T
- Main Gear Teeth: 37T
- Material - Input and Main Diff Gears: Precision manufactured steel
- Material - Diff Case: Tough precision moulded composite
- Material - Module Yoke: Tough precision moulded composite
- Material - Internal Diff Gears: High-strength steel straight-cut
- Output Shaft Type: Splined diff output shafts
- Lubrication: Pre-filled with 10,000 cSt silicone oil
- Assembly Status: Pre-assembled and ready to install
- Installation: Front or rear (F/R) compatible
- Power Rating: Designed for 4S brushless models
- Compatible Battery Type: 4S LiPo (14.8V nominal)
- Quantity Included: 1 x Pre-Assembled Metal Gear F/R Transmission Module Set
- Compatible ARRMA Models: Kraton 4S, Outcast 4S, Vorteks 223S, Senton 223S, Typhon 223S, Big Rock 223S, Granite 223S, Vorteks 223S, Senton 223S, Infraction 223S, and other specified ARRMA 4S models
Overview
The ARRMA Metal Gear F/R Transmission Module Set is a premium drivetrain component designed for serious RC enthusiasts who demand durability, precision and reliability from their high-performance RC vehicles. This pre-assembled transmission module is engineered to deliver exceptional performance across both front and rear axle positions, making it an essential upgrade or replacement part for ARRMA 4S brushless models. Whether you're running an ARRMA Kraton 4S, Outcast 4S, or compatible models, this transmission set represents a significant step up in drivetrain engineering and robustness.
Supplied completely pre-assembled and ready to install, this Metal Gear F/R Transmission Module eliminates the need for complex assembly and allows you to get back on the track or trail within minutes. The set is packed with professional-grade engineering that reflects ARRMA's commitment to building RC cars that can withstand demanding driving conditions, whether you're bashing in the garden, competing at your local club, or pushing your RC monster truck or buggy to its limits. For UK RC enthusiasts searching for a reliable drivetrain upgrade for their brushless RC vehicles, this transmission module delivers the quality and performance you expect from a recognised manufacturer.
This transmission module represents the kind of precision engineering that separates entry-level RC cars from serious performance machines. The metal gears, advanced composite materials and careful engineering throughout ensure that your ARRMA vehicle maintains peak performance lap after lap, session after session. If you've invested in a quality brushless RC model and want to protect that investment while maximising performance, the Metal Gear F/R Transmission Module Set is the intelligent choice.
Key Features
- Steel Input and Main Diff Gears — The transmission utilises high-grade steel gears for both the input and main differential, which are precision manufactured to ensure accurate tooth mesh between all components. This level of precision manufacturing is crucial because even microscopic variations in gear alignment can cause noise, vibration and premature wear; the careful production process ensures smooth, efficient power transfer from motor to wheels.
- 1.35 Module Input and Main Gear Tooth Profile — The 1.35 module specification refers to the size and spacing of the gear teeth, providing the optimal balance between strength and efficiency. This tooth profile is specifically engineered for ultimate durability, meaning the gears can handle the power and torque outputs of high-performance 4S brushless motors without stripping, cracking or wearing prematurely.
- Precision Moulded Composite Diff Case and Module Yoke — The differential case and module yoke are manufactured using tough precision-moulded composite materials that provide rigid support for all internal components. This tough construction ensures accurate alignment between gears at all times, preventing gear deflection that could cause binding, noise or efficiency loss even under extreme driving conditions.
- High-Strength Steel Straight-Cut Diff Internal Gears — The internal differential gears are manufactured from high-strength steel and feature straight-cut tooth profiles rather than spiral cuts, providing robust engagement and reliable torque distribution to both drive wheels. Straight-cut gears are known for their reliability in high-performance applications and their ability to maintain consistent performance across a wide range of driving conditions and temperatures.
- Splined Diff Output Shafts — The output shafts feature precision-machined splines that engage securely with the drive shafts, ensuring positive power transmission with zero slip or play. The spline design eliminates the possibility of shaft slippage during hard acceleration or emergency braking, maintaining the integrity of your RC vehicle's drivetrain geometry.
- 10,000 cSt Silicone Oil Fill — The transmission module is pre-filled with premium 10,000 centistoke silicone oil, which provides optimal lubrication and thermal management for all internal components. This viscosity level is specifically chosen to reduce friction whilst maintaining a protective oil film under the extreme pressures generated by high-performance driving, extending component life and maintaining smooth operation even after extended use.
- Pre-Assembled and Ready to Install — This transmission module arrives completely assembled and filled, requiring no further setup before installation into your ARRMA vehicle. Simply unbolt your existing transmission, bolt in the new Metal Gear module, and you're ready to drive, saving time and eliminating the risk of assembly errors that could compromise performance or durability.
Technical Performance
The ARRMA Metal Gear F/R Transmission Module Set represents the pinnacle of drivetrain engineering for high-performance RC vehicles in the 1/10 and 1/8 scale categories. The 37T/13T gear ratio (37-tooth main gear paired with 13-tooth input gear) provides an optimal balance between acceleration and top-speed capability, allowing 4S brushless models to deliver aggressive acceleration whilst maintaining control and efficiency. The precision-manufactured steel gears, with their 1.35 module tooth profile, are designed to handle the brutal torque outputs of modern brushless motors without deflection or premature wear. The composite construction of the differential case and yoke provides exceptional rigidity, maintaining perfect gear alignment even when driving over rough terrain or landing hard jumps. The pre-fill of 10,000 cSt silicone oil ensures that the transmission operates smoothly throughout the temperature range experienced during typical RC driving, whether you're bashing on a hot summer's day or driving in cooler weather. For drivers running 4S LiPo batteries (which provide approximately 14.8 volts at full charge), this transmission module has been specifically engineered to handle the power delivery without compromise. The straight-cut differential gears ensure reliable and consistent torque distribution to both rear wheels during cornering and acceleration, maintaining traction and predictable handling characteristics. This is genuine performance hardware that has been proven on the track and trail by ARRMA's development team and thousands of satisfied customers worldwide.
What's in the Box
- 1 x Pre-Assembled Metal Gear F/R Transmission Module Set (37T/13T, 1.35M)
Frequently Asked Questions
- Which ARRMA models is this transmission module compatible with? — The Metal Gear F/R Transmission Module Set is compatible with a comprehensive range of ARRMA vehicles including the Kraton 4S, Outcast 4S, Vorteks 223S, Senton 223S, Typhon 223S, and numerous other ARRMA models featuring the appropriate drivetrain configuration. Consult the complete compatibility list on the ARRMA website or contact RC Model Shop to confirm your specific model is supported before purchasing.
- Can I use this transmission module in the front and rear of my RC vehicle? — Yes, this is a front and rear (F/R) transmission module, meaning it is designed to work in both the front and rear axle positions on compatible ARRMA vehicles. This versatility makes it an excellent choice whether you're replacing a worn component or upgrading your entire drivetrain for improved durability and performance.
- What are the advantages of metal gears compared to nylon or composite gears? — Metal gears, specifically the precision-manufactured steel gears in this module, offer superior strength, durability and longevity compared to nylon or composite alternatives. Steel gears can withstand higher torque loads without stripping, maintain their accuracy over thousands of driving cycles, and perform reliably even in demanding conditions. For drivers pushing their RC vehicles hard, metal gears represent a worthwhile investment in durability and performance.
- Is this transmission pre-assembled and ready to use? — Absolutely. The Metal Gear F/R Transmission Module Set arrives completely assembled and pre-filled with silicone oil, requiring no additional setup beyond installation into your vehicle. This means you can have your RC vehicle back on the track or trail within minutes of receiving the package, without the complexity or risk of assembling components yourself.
- What battery does this transmission module require? — This transmission module is designed for ARRMA 4S models, which typically run on 4S LiPo batteries (14.8V nominal voltage). Ensure your ARRMA vehicle is specified as a 4S model and that you're using an appropriate 4S LiPo battery with your chosen charger and battery management system.
- How long will this transmission module last? — With proper maintenance including regular inspection and occasional top-ups of the silicone oil, the Metal Gear F/R Transmission Module should provide years of reliable service. The precision manufacturing and high-quality materials mean this is not a consumable item but rather a long-term investment in your RC vehicle's drivetrain performance and durability.
- Is this suitable for beginners? — This is a replacement or upgrade component rather than a complete RC vehicle, so it's most suitable for experienced RC enthusiasts who already own compatible ARRMA models and understand drivetrain components. Beginners should start with a complete ready-to-run RC vehicle and can upgrade components like this transmission as they develop their skills and knowledge.
- What makes the 1.35 module tooth profile special? — The 1.35 module specification is carefully engineered to provide optimal strength and efficiency for high-performance RC vehicles. This tooth profile offers the right balance between gear strength and mesh efficiency, ensuring reliable power transmission whilst minimising friction losses and heat generation during extended driving sessions.
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 Gear F/R Transmission Module Set 4S v2 Z-ARA311156 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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