UL-Trac Limited Slip Differentials

09/11/2026

🇦🇺 UL-TRAC IS HEADING DOWN UNDER! 🇦🇺

We're delighted to announce that Carl Muller at SMCKA is our official Australian partner for UL-Trac English differential products! 🤝

As UL-Trac continues to expand into new markets, we're pleased to be working with Carl to bring our performance drivetrain technology to enthusiasts, racers and specialist builders across Australia.

Carl and the SMCKA team will be stocking and distributing UL-Trac English Plate Type and Helical L*Ds throughout Australia, giving Australian customers direct access to our growing range of performance differential solutions.

Developed through months of testing and refinement, with experience gained on rally stages, race circuits and the road, UL-Trac brings together the engineering expertise of 3J Driveline and Longford Gear Cutting Co. Ltd in a new generation of performance drivetrain products.

And this is just the beginning, with further applications and products already in development!

🔥 Ultimate Performance.
🔧 Ultimate Versatility.
🏁 The Ultimate Package.

We're looking forward to working with Carl and SMCKA to grow the UL-Trac brand across Australia and get more of our products into the hands of those who demand more from their drivetrains.

Welcome aboard, Carl! 🇬🇧🤝🇦🇺

09/11/2026

🇮🇪 UL-TRAC CONTINUES TO EXPAND! 🇬🇧

We're pleased to welcome Eoin Regan of Sora Solutions as our official UL-Trac partner for Ireland and Northern Ireland! 🤝

As UL-Trac continues to establish itself in new markets, having the right partners on board is a vital part of the journey. We're delighted to be working with Eoin to make our growing range of performance differentials more accessible to customers across Ireland and Northern Ireland.

Eoin and the Sora Solutions team will be stocking and distributing UL-Trac English and Atlas Plate-Type L*Ds, bringing our performance differential technology closer to the enthusiasts, competitors and specialist builders who need it.

Developed through months of testing and refinement, UL-Trac combines the engineering expertise of 3J Driveline and Longford Gear Cutting Co. Ltd with a growing range of products designed for real-world performance, whether on the road, the track or the rally stages.

With further applications already in development, this is just one more step in the expansion of the UL-Trac range.

🔥 Ultimate Performance.
🔧 Ultimate Versatility.
🏁 The Ultimate Package.

We're looking forward to working with Eoin and Sora Solutions as UL-Trac continues to grow across Ireland and Northern Ireland.

Welcome aboard, Eoin! 🇬🇧🤝🇮🇪

09/11/2026

🇳🇱 UL-TRAC IS EXPANDING ACROSS EUROPE! 🇳🇱

We're delighted to announce that Johan Van Doornik of AGB Gearboxes is our official UL-Trac partner in the Netherlands! 🤝

As UL-Trac continues to grow, we're building a network of trusted partners who share our commitment to quality engineering and performance. Having worked to establish the brand and bring our first products to market, we're excited to take the next step with Johan and the team at AGB Gearboxes.

Even better, AGB Gearboxes will be stocking and distributing the complete UL-Trac range, giving customers in the Netherlands access to our full portfolio of performance drivetrain products, from limited-slip differentials to specialist gear kits and transmission components.

With products developed and refined through months of testing on rally stages, race circuits and the road, UL-Trac brings together the engineering expertise of 3J Driveline and Longford Gear Cutting Co. Ltd in a growing range designed for enthusiasts, competitors and specialist builders.

And with plenty more products in development, there's much more to come!

🔥 Ultimate Performance.
🔧 Ultimate Versatility.
🏁 The Ultimate Package.

We're looking forward to working with Johan and AGB Gearboxes to bring the UL-Trac range to even more customers across the Netherlands and beyond.

Welcome aboard, Johan! 🇬🇧🤝🇳🇱

09/11/2026

⚙️ PRECISION ENGINEERING. RIGHT FROM THE START. 🇬🇧

Ever wondered what goes into making an UL-Trac Limited Slip Differential?

Here's a little behind-the-scenes action as we machine the ramp profiles for our plate-type L*Ds. 🔧

These carefully machined profiles play a crucial role in determining how the differential responds and delivers locking action under acceleration and deceleration.

It's all part of the engineering that goes into creating a differential tailored to its intended application.

🇬🇧 Designed and manufactured in the UK.

Ultimate Performance. Ultimate Versatility. The Ultimate Package.

🏁 Who else enjoys watching proper engineering in action?

08/11/2026

🌹 We Will Remember Them

This Remembrance Sunday, we honour those who made the ultimate sacrifice and reflect on the bravery and selflessness of generations past.

Their sacrifice will never be forgotten.

Lest We Forget. 🌹

14/10/2026

🚨 COMING SOON – UL-Trac F20 Dog Engagement Gear Kit 🚨
After a full season of rallying and auto-grass development, our first production run of UK-designed and manufactured F20 gear kits is almost ready.
The new UL-Trac 5-speed dog engagement kit has been engineered with a clear focus on strength, shift quality, and long-term reliability in competition use.
⚙️ Optimised gear tooth profiles for maximum strength and durability
⚙️ Refined dog engagement design for clean, consistent shifting
⚙️ Option to retain OEM selector forks or upgrade to billet steel machined forks
⚙️ All gears REM superfinished
⚙️ Choice of two ratio sets and three final drives
Proven through a full season of competition use, with production units landing soon.
Available shortly 🏁

12/10/2026

24/08/2026

👌

🚨 NEW FROM 3J DRIVELINE: UL-Trac Rear L*D for Nissan Skyline GT-R R32, R33 & R34 🚨
We’re excited to expand our UL-Trac Limited Slip Differentials range with a brand-new rear differential for the legendary Nissan Skyline GT-R, developed in partnership with Japanese performance specialists Special Vehicle Services (SVS)
Designed for fast road, track and competition use, the new UL-Trac delivers smooth, progressive torque transfer for excellent traction, confidence and predictability when you need it most.
Its proven variable torque biasing design provides controlled torque transfer while retaining the refined driving characteristics GT-R owners expect on the road.
🔧 Precision engineered for performance
🇬🇧 Designed, manufactured & assembled in the UK
🏁 Developed for road, track & competition use
⚙️ Smooth, progressive torque transfer
💪 Durable, dependable performance
🚗 Excellent road manners with serious track capability
SVS already supplies the exclusive UL-Trac front differential for the R32, R33 and R34 GT-R. The addition of the new rear unit means owners can now benefit from a complete UL-Trac solution for their Skyline.
Available now, exclusively through SVS.
Full Press Release Here:https://www.3jdriveline.com/_webedit/uploaded-files/All%20Files/SVS%20R32%20Rear%20PR.pdf

08/06/2026

The UL-Trac F20 Dog Engagement Kits are moving fast.
This shelf was full last week. Today, there's a lot more space between the gears.
Demand for our 5-speed F20 Dog Engagement Kit has been incredible, and the remaining stock won't be sitting here for long.
If you've been planning your next gearbox build, now's the time.

03/06/2026