Overview
The Traxxas Center Differential, Complete (TRX8571) is a precision-engineered replacement differential designed specifically for the Traxxas Unlimited Desert Racer, one of the most capable high-performance RC desert racing trucks on the market. This complete differential assembly transforms your UDR's handling characteristics when driving on medium to high-traction surfaces, making it the ideal upgrade for RC enthusiasts in the UK who want to push their desert racer to the next level. Whether you're a seasoned competitor looking to fine-tune your setup or a dedicated RC car UK hobbyist wanting to optimise your Unlimited Desert Racer's performance, this differential delivers the responsive handling and control you need to dominate varied terrain.
The Unlimited Desert Racer comes standard with a locked spool in the rear axle, which distributes equal power to both rear wheels regardless of traction conditions. This design is excellent for loose desert terrain where maximum traction and consistent power delivery are essential. However, when you transition to medium or high-traction surfaces—such as packed dirt, clay, or mixed terrain—a traditional differential makes a dramatic difference. The Traxxas Center Differential, Complete allows each rear wheel to rotate at different speeds when cornering, resulting in significantly more responsive handling, reduced understeer, and much easier drivability. Installation takes just 20-30 minutes with basic tools, making this an accessible upgrade for RC model builders of all skill levels.
This is a genuine Traxxas component manufactured to the same exacting standards as your UDR, ensuring perfect fitment and reliable performance. As an authorised Traxxas retailer, RC Model Shop stocks genuine Traxxas parts that come with manufacturer backing and support. Upgrading your Unlimited Desert Racer with this differential is one of the most impactful modifications you can make to expand the truck's capabilities across different driving conditions and terrain types.
Key Features
- Complete Differential Assembly — This is a fully assembled differential unit, not a component kit, meaning it arrives ready to install directly into your Unlimited Desert Racer with no additional assembly work required. You simply remove the existing spool and install this differential in its place.
- Improved High-Traction Handling — Unlike the stock spool that locks both rear wheels together, this differential allows independent wheel rotation during cornering, which dramatically improves handling responsiveness on medium and high-traction surfaces and makes the truck significantly easier to drive smoothly.
- Includes New Bearings — The differential comes supplied with new precision bearings ready for installation, eliminating the need to source or reuse existing bearings and ensuring optimal performance from the moment you install it.
- Direct UDR Compatibility — This differential is engineered specifically to fit the Unlimited Desert Racer's rear axle assembly, guaranteeing perfect fitment without modification or adaptation required.
- Quick 20-30 Minute Installation — Despite appearing complex, installation is straightforward and can be completed in just 20-30 minutes using basic hand tools, making this an accessible upgrade even for builders with modest mechanical experience.
- Precision Gear Design — The differential features a sophisticated planetary gear assembly that distributes power intelligently between the rear wheels based on traction conditions, providing superior off-road performance compared to a locked spool.
- Traxxas Quality Construction — Manufactured by Traxxas using their proven engineering and material standards, this differential maintains the same durability and reliability expected from genuine Traxxas components.
Technical Performance
The Traxxas Center Differential, Complete represents a significant engineering upgrade that addresses one of the fundamental limitations of the Unlimited Desert Racer's stock configuration. The stock spool design, whilst excellent for loose desert terrain, becomes a handling liability on anything with reasonable traction. This differential replaces that spool with a sophisticated planetary gear system that allows the rear wheels to operate independently when cornering whilst still distributing power efficiently under acceleration. The installation process, whilst requiring some disassembly of the rear axle, is remarkably straightforward. You'll need to remove the rear axle assembly from the truck, split the differential carrier housing, extract the spool, and install the new differential in its place. Traxxas has engineered the differential to fit only one way into the carrier housing, eliminating installation confusion. The gear side features a distinctive design that aligns with the reinforcing ribs inside the carrier half, whilst the planetary gear assembly seats securely via metal ring tangs. Once reassembled, a light application of Traxxas High Performance Grease (part TRX5041) to the ring gear ensures smooth operation. The differential carrier then reinstalls into the axle using eight 3x12mm screws, after which you reverse the disassembly steps to complete installation. This modular design approach exemplifies Traxxas's commitment to customer serviceability and upgrade accessibility.
What's in the Box
- Complete rear differential assembly with planetary gear system
- Precision bearings pre-installed in the differential carrier
- All necessary internal gears and shafts
What You Need to Complete
- 8mm nut driver or wrench (for wheel removal)
- 2mm hex driver
- 2.5mm hex driver
- Traxxas High Performance Grease (TRX5041) — essential for lubricating the ring gear during installation
- Traxxas 8712 7-Piece Metric Hex and Nut Driver Essentials Set is recommended for easier, faster installation with all required tools in one convenient kit
Frequently Asked Questions
- Will this differential work on surfaces other than desert terrain? — Yes, this is precisely why the differential exists. Whilst the Unlimited Desert Racer ships with a locked spool that's optimised for loose desert conditions, this differential dramatically improves handling on medium and high-traction surfaces including packed dirt, clay, gravel, and mixed terrain. If you regularly drive your UDR in varied conditions, this upgrade is essential for responsive, predictable handling.
- How long does installation actually take? — Traxxas specifies 20-30 minutes for a complete installation if you have the proper tools and basic mechanical familiarity. The process involves removing the rear axle assembly, splitting the differential carrier, extracting the spool, installing the new differential, and reversing the disassembly steps. With the recommended Traxxas tool kit, the process is faster and more comfortable than using makeshift tools.
- Is this suitable for beginners? — Whilst the installation isn't overly difficult, it does require removing the rear axle assembly and understanding how to properly reassemble the differential carrier housing. If you're a beginner to RC model building, this is an intermediate-level upgrade. However, the Traxxas installation guide is extremely detailed with step-by-step photos, making it accessible to anyone willing to follow instructions carefully. Many beginner RC car UK enthusiasts successfully complete this upgrade with the help of the excellent support documentation.
- What's the difference between this differential and the stock spool? — The stock spool locks both rear wheels together so they always rotate at the same speed, which is ideal for loose terrain where traction is minimal. This differential allows each wheel to rotate independently when cornering, dramatically improving handling response and reducing understeer. On high-traction surfaces, the differential-equipped UDR is noticeably easier to drive smoothly and performs significantly better through technical sections.
- Do I need any special lubricants? — Yes, Traxxas specifies their High Performance Grease (TRX5041) should be applied to the ring gear during installation. This is not a generic lubricant and is specifically formulated for Traxxas differentials. Using the correct grease ensures optimal performance and longevity of the differential assembly.
- Will I need to upgrade anything else on my UDR after installing this? — The differential is a complete, bolt-on upgrade that requires no modifications to other truck systems. However, you should ensure you have the correct tools (8mm nut driver, 2mm and 2.5mm hex drivers) and the specified High Performance Grease before beginning installation.
- Is this a genuine Traxxas part? — Yes, this is an official Traxxas component (model TRX8571) manufactured to Traxxas standards. When you purchase from RC Model Shop, you receive genuine Traxxas products with manufacturer backing and support.
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 Center Differential, Complete (fits Unlimited Desert Racer) TRX8571 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.
- Brand: Traxxas
- Model Number: TRX8571
- Product Type: Center Differential, Complete
- Compatibility: Traxxas Unlimited Desert Racer
- Assembly Status: Fully assembled and ready to install
- Contents: Complete differential assembly with planetary gear system
- Included Bearings: Yes, new precision bearings pre-installed
- Installation Time: 20-30 minutes
- Tools Required: 8mm nut driver or wrench, 2mm hex driver, 2.5mm hex driver
- Lubricant Required: Traxxas High Performance Grease (TRX5041)
- Recommended Tool Kit: Traxxas 8712 7-Piece Metric Hex and Nut Driver Essentials Set
- Performance Improvement: Enhanced handling on medium and high-traction surfaces, reduced understeer, improved responsiveness compared to locked spool configuration
- Installation Features: Differential fits only one way into carrier housing with reinforcing ribs alignment system
- Carrier Housing Fasteners: Eight 3x12mm screws securing differential carrier to axle
- Ring Gear Lubrication: Requires Traxxas High Performance Grease application during installation
- EAN Code: 020334857101
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