UL-Trac Limited Slip Differentials

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

03/06/2026

🚨 NOW IN STOCK 🚨
The UL-Trac F20 5-Speed Dog Engagement Gear Kit is now available to order from stock
Designed for maximum strength, durability, and performance, the kit features:
✔ Unique UL-Trac gear tooth profiles for enhanced strength and longevity
✔ Unique dog-tooth profile for smooth, consistent, and durable shifting
✔ REM Super-Finished gears as standard
✔ Compatible with original equipment selector forks or our upcoming steel billet-machined selector forks
✔ Available as a complete gear kit or professionally built by our experts into your supplied donor gearbox

Coming soon:
🔜 Steel Billet-Machined Selector Forks (Pre-Order Available Now)
🔜 5.1 Final Drive Ratio (Pre-Order Available Now)

Stock of the kit is available now! Contact us to secure yours, or to discuss a complete gearbox build.

19/05/2026

🏁 K11 Micra owners, if you know… you know.
Humphris Rallysport is the go-to supplier for the 3J Driveline NXG Fast Road L*D to fit the Nissan K11 Micra, helping transform these lightweight hatchbacks into proper corner-carving weapons. 💥
Designed for fast road and motorsport use, the NXG Fast Road L*D gives the K11 the traction and stability it always deserved:
• Stronger drive out of corners
• Reduced inside wheel spin
• Sharper front-end response
• Improved grip in wet and loose conditions
• More predictable handling under power
Whether you’re building a fast road Micra, gravel rally car, sprint weapon, or B-road terror, the NXG unit helps get the power down cleanly and confidently. Tiny chassis. Huge attitude. 🚗💨
For pricing, availability, and fitting information, head over to Humphrisrallysport.co.uk and use their contact details to get in touch.
*D

11/04/2026

Noise. Speed. Victory. 🏁🔥
Out on track, in the heat of “Till 2 Litre Divisie V” competition, one car didn’t just show up… it dominated.
Taking the win with a seriously potent setup: one of the very first prototype UL-Trac F20 Dog Engagement Gear Kits, combined with the 3J Driveline NXG Performance F20 L*D.
The result? Brutal, lightning-fast shifts. Relentless traction. Pure race-winning performance. 🥇
This isn’t theory. This isn’t testing. This is proven where it matters most.
🚨 The UL-Trac F20 Dog Kit is coming soon… and it’s already making waves
⚙️ The 3J NXG Performance F20 L*D is available now — ready to transform your build
If you’re chasing tenths… or hunting wins… this is your next move.
Stay sharp. Stay ready. The game is about to change. 👀🔥

27/03/2026

Not just gears…
At Longford Gear Cutting Co. Ltd, we’re often known for gear cutting—but that’s only part of the story.
This batch of classic vehicle brake drums has been turned and milled from solid EN8 billets, delivering strength, consistency, and a finish that speaks for itself.
From one-off components to small production runs, we apply the same level of care and precision across everything we manufacture.
If you’ve got a project that needs more than off-the-shelf solutions, we’re ready to help.
Get in touch to see what we can produce.

26/03/2026

🚨 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 🏁

03/03/2026

🚀 NEW RELEASE — UL-Trac PG1 Helical Gear Conversion Kit!
Say goodbye to lazy cruising between gears and hello to a gearbox that truly delivers. Our new 3rd, 4th & 5th helical gear conversion kit for PG1 gearboxes (MG Rover / Lotus Elise applications) is engineered for smoother shifts, quieter running and sharper acceleration, keeping you right in the power band where it matters most. ⚙️🔥
Available with a choice of TWO ratio sets to suit your build and driving style.
This kit is available exclusively direct through Andrew Goater — contact us for full details and ordering information.
Built for road. Proven for performance.
Website link here 👉 https://www.longfordgear.co.uk/webshop/gear-drives/gear-sets/mg-rover-lotus-elise-pg1-3rd-4th-5th-helical-gear-conversion-kit/

24/02/2026

⚙️ This is where speed starts. ⚙️
UL-Trac F20 Dog Gears being machined from solid, cut with absolute intent.
Clean passes. Tight tolerances. No room for hesitation.
Built for drivers who shift hard, launch harder, and expect their transmission to keep up every single time.
From billet to battle-ready.