Overview
The Traxxas Idler 20-T / Idler Gear Shaft (TRX3996X) is an essential replacement component for owners of the legendary Traxxas E-Maxx RC model. Whether you're a dedicated bashers enjoying high-speed RC fun or a serious competitor pushing your vehicle to its limits, this genuine Traxxas spare part ensures your transmission system continues to perform at peak efficiency. The idler gear shaft is a critical component in your RC car's drive train, and sourcing authentic Traxxas parts from an authorised UK retailer guarantees compatibility and reliability every single time.
As one of the most respected names in RC car manufacturing globally, Traxxas designs every component with precision engineering and durability in mind. The E-Maxx platform has earned its reputation as one of the most capable brushless RC vehicles available, and maintaining it with genuine parts is essential for consistent performance. If you've experienced wear or damage to your idler gear shaft through regular use, replacement with this official Traxxas component will restore your transmission to factory specification, ensuring smooth power delivery and extending the life of your entire drivetrain.
RC enthusiasts across the UK trust genuine Traxxas spares because they know these parts are engineered to work perfectly with their vehicles. This idler gear shaft is manufactured to exact tolerances and tested to Traxxas standards, ensuring it integrates seamlessly with your E-Maxx transmission assembly and maintains the precise gear spacing critical for optimal drivetrain performance.
Key Features
- 20-Tooth Idler Gear Design — The 20-tooth configuration is specifically engineered for the E-Maxx drivetrain geometry, ensuring correct mesh angles and load distribution across all transmission components to maximise efficiency and minimise wear during operation.
- Complete Shaft Assembly — This is not just a gear; it's a complete idler gear shaft assembly, meaning you receive both the gear and the shaft in one integrated unit, simplifying installation and ensuring all components are perfectly matched to factory specifications.
- Genuine Traxxas Manufacturing — Produced by Traxxas using the same materials, tolerances and quality control processes as original equipment, this part is guaranteed to perform identically to the component it replaces, with no compromise on durability or precision.
- E-Maxx Compatibility — Designed specifically for the Traxxas E-Maxx platform, this component integrates seamlessly with your existing drivetrain, suspension and chassis geometry without requiring any modifications or adaptations.
- Wear Resistance — The gear teeth are manufactured from hardened materials selected to withstand the extreme forces generated by brushless motor power, resisting tooth stripping and degradation even under sustained high-performance use.
- Direct Replacement — This part is a direct replacement for damaged or worn original idler gear shafts, requiring no modification to your vehicle and ensuring your E-Maxx returns to factory performance characteristics immediately upon installation.
Technical Performance
The idler gear shaft is a fundamental component in any RC car's transmission system, responsible for maintaining consistent gear mesh and power distribution through the drivetrain. In the Traxxas E-Maxx, this component works in concert with the main drive gears to transfer power from the brushless motor through the transmission to the wheels. The 20-tooth idler gear has been engineered specifically for the E-Maxx's spur gear ratios and differential setup, ensuring optimal mesh angles that minimise friction losses whilst maintaining the precise spacing required for smooth operation under load. The shaft itself is manufactured from hardened steel, providing the rigidity necessary to prevent deflection even under the enormous torque loads generated by modern brushless motor systems. Traxxas has designed this assembly to handle the punishment of extreme off-road use, high-speed bashing, and competitive racing without compromise. The gear teeth are precision-cut and heat-treated to resist wear, stripping and fatigue failure. When you install this genuine Traxxas component, you're restoring your E-Maxx to its original engineering specification, ensuring the transmission delivers power smoothly and efficiently to all four wheels. For UK RC enthusiasts who demand reliability and performance from their ready-to-run RC vehicles, this is the correct replacement choice.
What's in the Box
- Traxxas Idler 20-T Gear Shaft Assembly (TRX3996X)
Frequently Asked Questions
- What is the idler gear shaft and why do I need to replace it? — The idler gear shaft is a critical component in your E-Maxx's transmission system that maintains gear mesh and transfers power through the drivetrain. Over time, through normal use, wear, or damage from impacts or high-speed bashing, the gear teeth can wear down, strip, or the shaft can become bent. When this happens, power delivery becomes inefficient, you may notice grinding noises, or the transmission may skip gears. Replacing it with this genuine Traxxas component restores full transmission performance.
- How do I know if my idler gear shaft needs replacing? — Common signs include grinding or clicking noises from the transmission area, difficulty engaging gears smoothly, power loss during acceleration, or visible damage to the gear teeth when you inspect the transmission.
- Is this part suitable for all E-Maxx models? — This part is designed for Traxxas E-Maxx vehicles. To confirm compatibility with your specific E-Maxx variant, we recommend checking your vehicle documentation or contacting our team of experienced RC experts at RC Model Shop who can verify fitment for your model.
- What tools do I need to install this part? — Installation typically requires basic RC tools including hex wrenches and screwdrivers. You'll need to partially disassemble your transmission to access the idler gear shaft. If you're unfamiliar with RC transmission work, we recommend consulting the Traxxas manual for your specific E-Maxx model or asking our knowledgeable team for guidance.
- Is this an official Traxxas part? — Yes, this is a genuine Traxxas component manufactured to original equipment specifications. The EAN number 020334399694 and part number TRX3996X confirm this is an authentic Traxxas spare part, not a third-party imitation.
- Will this part improve my E-Maxx's performance? — If your current idler gear shaft is worn or damaged, replacing it with this component will restore your transmission to factory performance. However, if your transmission is already in good condition, this is a maintenance part rather than an upgrade component.
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 Traxxas Idler 20-T / idler gear shaft TRX3996X 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.
- Manufacturer: Traxxas
- Part Number: TRX3996X
- Product Type: Idler Gear Shaft Assembly
- Gear Teeth: 20-T
- Vehicle Compatibility: Traxxas E-Maxx
- EAN: 020334399694
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
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