Overview
The ARRMA Diff Case and Idler Gear Set (47/29T, 0.8M) is an essential replacement component for a wide range of ARRMA 1/10 scale RC vehicles, including the popular FURY, GORGON, QUAKE and VORTEKS models. Whether you're a seasoned RC enthusiast or discovering the world of RC cars in the UK for the first time, this precision-engineered differential system is designed to keep your vehicle performing at its best during intense driving sessions. This is a genuine ARRMA spare part, manufactured to the exact same standards as the original equipment fitted to new ARRMA ready to run RC trucks and buggies.
Differential systems are critical to RC vehicle performance, allowing your wheels to rotate at different speeds during cornering whilst maintaining traction and control. When your existing differential components wear out from regular use, or if you're upgrading to a fresh setup, this complete Diff Case and Idler Gear Set provides everything you need to restore your vehicle to factory specifications. The 47-tooth main differential gear combined with the 29-tooth idler gear creates a precisely engineered drivetrain setup optimised for smooth, responsive handling across diverse terrain and driving styles.
Built with tough composite material, this differential set is engineered for durability during the demands of extreme RC action, whether you're bashing through rough terrain, racing competitively, or simply enjoying weekend driving sessions with your RC hobby. The precision manufacturing ensures accurate fitment and smooth transmission operation in all conditions, so you can focus on driving rather than worrying about mechanical reliability. This is the genuine OEM replacement part trusted by ARRMA owners across the UK and worldwide.
Key Features
- Tough Composite Material Construction — The differential case and idler gear are manufactured from durable composite materials that are engineered to withstand the extreme stresses of aggressive RC driving without cracking, stripping or breaking, ensuring long-lasting performance season after season.
- 47-Tooth Main Differential Gear — The main differential case features 47 teeth, which combined with the 29-tooth idler gear creates the precise gear ratio needed for optimal acceleration, top speed and handling balance across all ARRMA 1/10 scale models in the compatible range.
- 29-Tooth Idler Gear — The matching 29-tooth idler gear is precision-cut to work seamlessly with the main differential, ensuring smooth power transfer from the motor through the transmission system without binding, slipping or noise.
- 0.8 Module Gear Specification — The 0.8M specification indicates the precise tooth size and pitch, ensuring perfect compatibility with all original ARRMA drivetrain components and guaranteeing a drop-in replacement experience with no modifications required.
- Precision Manufacturing for Smooth Operation — Every component in this set is manufactured to exacting tolerances, ensuring accurate fit within your vehicle's transmission housing and smooth, quiet operation across all driving conditions and terrain types.
- Genuine OEM ARRMA Component — This is the authentic factory-spec replacement part, not an aftermarket alternative, guaranteeing exact fitment and compatibility with your ARRMA RC vehicle without any risk of fitment issues or performance problems.
- Complete Differential Assembly Kit — Rather than just individual gears, this set includes everything needed for a full differential replacement: the case, cover, gasket and idler gear, making it a complete solution for your drivetrain refresh.
Technical Performance
This differential set is engineered using premium composite materials that balance weight, strength and durability for optimal 1/10 scale RC performance. The 47/29T gear ratio is specifically calibrated for ARRMA's range of 1/10 brushless and brushed vehicles including the FURY Short Course Truck, GORGON Monster Truck, QUAKE Monster Truck and VORTEKS Stadium Truck models. The 0.8 module specification refers to the precise tooth engagement dimension, ensuring perfect mesh with the pinion gear and other transmission components without slack, binding or noise. The differential housing itself is manufactured as a complete assembly with integrated bearing surfaces, whilst the matching gasket creates a watertight seal preventing oil leakage during wet or muddy driving sessions. The idler gear floats on the main shaft, allowing independent wheel rotation during cornering whilst the differential function distributes engine torque optimally between the left and right drive wheels. This engineering allows you to maintain traction and control during high-speed cornering, smooth acceleration across mixed terrain, and stable braking without wheel lock-up or loss of directional control. Regular inspection and replacement of differential components is part of proper RC vehicle maintenance, especially if you drive competitively or in demanding conditions.
What's in the Box
- 1 x Differential Case (47T)
- 1 x Differential Cover
- 1 x Differential Gasket
- 1 x Idler Gear (29T)
Compatible ARRMA Models
This genuine ARRMA differential set is a standard replacement component for the following 1/10 scale models:
- ARRMA 1/10 FURY 223S DSC 2WD RTR Brushless Short Course Truck
- ARRMA 1/10 FURY 2WD RTR Brushed Short Course Truck
- ARRMA 1/10 FURY 2WD RTR Brushed Short Course Truck with Battery & Charger Included
- ARRMA 1/10 GORGON 223S 2WD RTR Brushless Monster Truck
- ARRMA 1/10 GORGON 2WD RTA Kit Brushed Monster Truck with Battery & Charger Included
- ARRMA 1/10 GORGON 2WD RTR Brushed Monster Truck (available in multiple colour options including Blue, Yellow, Gun Metal and more)
- ARRMA 1/10 QUAKE 223S DSC 2WD RTR Brushless Monster Truck
- ARRMA 1/10 VORTEKS 223S DSC 2WD RTR Brushless Stadium Truck
- ARRMA 1/10 VORTEKS 2WD RTR Brushed Stadium Truck
- ARRMA 1/10 VORTEKS 2WD RTR Brushed Stadium Truck with Battery & Charger Included
Frequently Asked Questions
- Which ARRMA models use this differential case and idler gear set? — This 47/29T 0.8M differential set is fitted as standard to multiple ARRMA 1/10 scale models including the FURY Short Course Truck, GORGON Monster Truck, QUAKE Monster Truck and VORTEKS Stadium Truck in both brushless and brushed versions. Check the full compatibility list above to confirm your specific model.
- How do I know when my differential needs replacement? — Signs that your differential components need attention include noise from the drivetrain during acceleration, loss of traction in corners, oil leaking from the differential housing, or difficulty turning smoothly. If you've had a crash or impact to the transmission area, inspection is recommended.
- Is this a complete differential kit or just individual parts? — This is a complete differential replacement set including the main case, cover, gasket and idler gear, meaning you have everything needed to perform a full differential refresh without purchasing additional components separately.
- What is the gear ratio of this differential set? — The 47-tooth main gear combined with the 29-tooth idler gear creates the specific gear ratio calibrated for your ARRMA vehicle's performance characteristics. The 0.8M specification ensures precise tooth engagement with your vehicle's pinion gear.
- Can I use this differential in other RC vehicles? — This component is manufactured specifically for ARRMA vehicles and is not compatible with other RC brands. Always verify your vehicle model against the compatibility list before purchasing.
- Is this a genuine ARRMA part? — Yes, this is an authentic OEM ARRMA component manufactured to factory specifications, not a third-party aftermarket alternative. You can order with confidence knowing you're getting genuine parts.
- Do I need special tools to install this differential? — Installation typically requires basic RC tools including hex keys, screwdrivers and differential oil, but no specialist equipment. Your ARRMA manual will provide detailed installation instructions specific to your model.
- Will this improve my vehicle's performance? — As a replacement part, this differential restores your vehicle to its original performance level. If your existing differential was worn or damaged, replacement will restore smooth handling, acceleration and cornering control to like-new condition.
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 Diff Case and Idler Gear Set (47/29T, 0.8M) Z-ARA311095 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.
