Traxxas TRX-4 Centre Driveshaft Extension Kit with Internal-Spline Shafts TRX8150X

Overview

The Traxxas Driveshaft Extension Kit for TRX-4 is an essential upgrade for RC enthusiasts looking to extend the wheelbase capabilities of their TRX-4 crawler. Designed specifically for use with the TRX-4 Long Arm Lift Kit, this driveshaft extension kit allows you to modify your RC car UK setup to accommodate a 336 mm wheelbase chassis, opening up new possibilities for customisation and performance tuning. Whether you're a dedicated rock crawler, a weekend basher, or an RC hobbyist experimenting with different chassis configurations, this genuine Traxxas spare part ensures compatibility and reliability with your existing TRX-4 platform.

Traxxas is renowned throughout the RC community for manufacturing precision-engineered components that meet the exacting standards of competitive and casual drivers alike. This driveshaft extension kit is no exception, featuring internal-spline shafts in multiple lengths to provide the flexibility needed for different suspension geometries and wheelbase extensions. The kit's carefully selected shaft lengths work in harmony with the Long Arm Lift Kit to maintain proper driveline angles and ensure smooth power delivery to your wheels without binding or excessive wear.

If you're planning to upgrade your TRX-4 crawler with extended suspension geometry, this is the essential drivetrain component you need. The inclusion of multiple shaft lengths means you have the flexibility to configure your setup exactly as you require, whether you're building a extreme rock crawler or simply want to experiment with different suspension travel configurations available for ready to run RC cars in the UK market.

Key Features

• Multiple Length Options — This kit includes XX-long internal-spline shafts (2), a long internal-spline shaft (1), medium internal-spline shafts (2), and a short internal-spline shaft (1), providing maximum flexibility in driveline configuration. Having shafts in multiple lengths means you can fine-tune your setup for different suspension travel ranges and wheelbase extensions without needing to purchase additional parts separately.
• Designed for TRX-4 Long Arm Lift Kit Compatibility — These driveshafts are specifically engineered to work seamlessly with the TRX-4 Long Arm Lift Kit, ensuring proper fitment and maintaining the correct driveline angles essential for reliability and performance. Using factory-matched components guarantees that your suspension geometry will be optimised and your drivetrain will operate without excessive stress.
• Internal-Spline Construction — All shafts in this kit feature internal-spline design, which provides a secure connection that resists slipping while maintaining smooth engagement even during extended articulation. This design is proven to be more durable than external-spline alternatives, particularly when exposed to the extreme suspension movements encountered in rock crawling.
• 336 mm Wheelbase Extension — This kit extends your TRX-4 to accommodate a 336 mm wheelbase chassis, significantly increasing the distance between front and rear axles. A longer wheelbase improves stability during high-speed runs and provides superior articulation over obstacles, making it ideal for serious crawlers who demand maximum suspension travel.
• Genuine Traxxas Component — As an official Traxxas part, this driveshaft extension kit is manufactured to the same rigorous quality standards as your TRX-4 chassis. Genuine parts ensure perfect fitment, longevity, and warranty coverage, giving you confidence that you're installing proven components rather than aftermarket alternatives.
• Essential Upgrade for Suspension Modifications — If you've already invested in the TRX-4 Long Arm Lift Kit, this driveshaft extension is the critical companion component that allows those suspension benefits to be realised. Without proper driveshaft extension, your suspension travel will be compromised and your drivetrain may be damaged by excessive angles.

Technical Performance

The Traxxas Driveshaft Extension Kit represents precision engineering specifically designed for the demands of modern RC crawling and suspension experimentation. The kit's six individual shafts are manufactured from durable materials capable of withstanding the extreme loading conditions encountered when articulating over rocky terrain and large obstacles. The internal-spline connection system ensures that power is transmitted efficiently from your transmission to the axles without slippage, even during the most demanding climbing manoeuvres. By providing shafts in XX-long, long, medium, and short configurations, this kit gives you the flexibility to match driveline geometry perfectly to your specific suspension setup and desired wheelbase length. The 336 mm wheelbase extension capability opens up entirely new possibilities for TRX-4 modifications, particularly for users who want to maximise suspension travel and improve weight distribution across a longer platform. The engineering behind each shaft length has been carefully calculated to work in harmony with the TRX-4's transmission geometry and the extended suspension geometry provided by the Long Arm Lift Kit, ensuring that driveline angles remain within optimal ranges regardless of suspension compression or extension.

What's in the Box

• Internal splined driveshaft, XX-long (quantity: 2)
• Internal splined driveshaft, long (quantity: 1)
• Internal splined driveshaft, medium (quantity: 2)
• Internal splined driveshaft, short (quantity: 1)

What You Need to Complete

• Traxxas TRX-4 Long Arm Lift Kit (required for proper installation and functionality)
• Traxxas TRX-4 chassis (as this is a direct upgrade component)
• Basic tools including hex drivers and screwdrivers for installation
• Potentially additional suspension geometry adjustment components depending on your specific setup requirements

Frequently Asked Questions

• What is the TRX-4 Driveshaft Extension Kit used for? — This kit extends the driveshaft length of your TRX-4 crawler to accommodate a 336 mm wheelbase chassis, which is essential when you've upgraded to the TRX-4 Long Arm Lift Kit. Without proper driveshaft extension, your suspension travel will be limited and your drivetrain may be damaged by excessive angle stress.
• Do I need this kit if I'm using the TRX-4 Long Arm Lift Kit? — Yes, this driveshaft extension kit is specifically designed to work with the TRX-4 Long Arm Lift Kit and is considered essential for proper operation. The lifted suspension geometry changes the required driveline angles, making driveshaft extension necessary for optimal performance and component longevity.
• Why are there multiple shaft lengths in one kit? — The kit includes XX-long, long, medium, and short shafts to provide maximum flexibility in configuring your specific setup. Different suspension geometries, wheelbase lengths, and articulation ranges may require different shaft combinations, so having multiple options means you can optimise your configuration without purchasing additional parts.
• Are these internal-spline shafts better than external-spline? — Internal-spline shafts are generally more durable and reliable, particularly in demanding applications like rock crawling. The internal design provides a more secure connection that resists slipping during extreme articulation, making them the preferred choice for serious crawlers and suspension modifications.
• Can I use this kit with the standard TRX-4 suspension? — This kit is specifically designed for use with the TRX-4 Long Arm Lift Kit. Using it with the standard suspension may result in incorrect driveline angles and improper fitment, so it's best to use this as a complete system upgrade alongside the Long Arm Lift Kit.
• What happens if I don't use the correct driveshaft lengths? — Using incorrect driveshaft lengths can lead to binding during suspension articulation, excessive angle stress on CV joints, reduced suspension travel, and potential drivetrain damage. Proper driveshaft length is critical for reliable operation, which is why this kit provides multiple options for different configurations.
• Is this a genuine Traxxas part? — Yes, this is an official Traxxas component manufactured to factory specifications. Genuine parts ensure perfect fitment with your TRX-4 chassis, maintain warranty coverage, and provide the quality and reliability that serious RC enthusiasts demand.

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 Driveshaft extension kit, center (includes internal splined, x-long (2), internal splined, long (1), internal splined, medium (2) & internal splined, short (1)) (for use with TRX-4 Long Arm Lift Kit) TRX8150X 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.