3J Driveline SVS UL-Trac Helical Gear-Bias Limited Slip Differentials

Made in England

The 3J Driveline SVS UL-Trac Helical Gear-Bias Rear Limited Slip Differential is the result of more than three decades of Nissan GT-R drivetrain development. Designed specifically for high-performance road and motorsport applications, it provides significantly improved front-end traction while maintaining the smooth driving characteristics of the factory open differential.

Over 30 Years of GT-R Differential Development

Special Vehicle Services (SVS) pioneered the use of torque-biasing rear differentials for the Nissan GT-R platform, introducing its first units in 2003 after extensive testing proved that conventional clutch-type and ratcheting LSDs produced undesirable steering behaviour during everyday driving.

Unlike plated differentials, which can cause harsh engagement, steering kickback and poor low-speed manoeuvrability, the SVS torque-biasing design delivers predictable power transfer while preserving excellent road manners.

The result is a rear differential that feels almost identical to the factory open differential during normal driving, yet provides substantially improved traction and stability whenever grip is limited.

UL-Trac Helical Gear-Bias Technology

The latest UL-Trac differential represents the next generation of torque-biasing technology.

Featuring redesigned helical gears, optimised tooth profiles and increased contact surfaces, the UL-Trac maximises torque transfer while reducing wear. Heavy-duty preload springs maintain consistent performance throughout the life of the differential.

Rather than relying on clutch plates, the internal helical gear arrangement automatically transfers torque to the wheel with the greatest available traction whenever wheel slip occurs.

Key Benefits

• Smooth, progressive torque transfer

• No clutch plates to wear or service

• Excellent road manners with factory-like steering feel

• Improved corner exit traction

• Increased stability in wet conditions

• Enhanced confidence during spirited driving and motorsport use

• Maintenance-free operation under normal service conditions

Proven Motorsport Performance

The first GT-R fitted with an SVS rear torque-biasing differential competed in Australian endurance racing, including demanding events in Tasmania.

The differential completed multiple endurance events without failure, helping the team secure an overall class championship. The same torque-biasing philosophy continues to underpin today’s UL-Trac differential design.

Designed with 3J Driveline

The current SVS differential is manufactured exclusively in England by 3J Driveline and Longford Gear Cutting Co. Ltd, two of Britain’s most respected drivetrain engineering companies.

Developed jointly with SVS, the UL-Trac combines decades of Nissan GT-R experience with industry-leading British engineering to produce what is widely regarded as one of the finest torque-biasing front differentials available for the GT-R platform.

British Engineering Excellence

Longford Gear Cutting Co. Ltd has been manufacturing precision drivetrain components since 1946, supplying OEM manufacturers and professional motorsport teams throughout the UK, Europe and worldwide.

Together, SVS and 3J Driveline bring more than 60 years of combined differential engineering and manufacturing experience to every differential produced.

Features

• Manufactured in England

• Precision machined by 3J Driveline & Longford Gear Cutting Co. Ltd

• Helical torque-biasing limited-slip design

• Direct replacement for the factory rear differential

• Suitable for both road and motorsport applications

• No clutch packs requiring maintenance

• Smooth, quiet operation

• Improved rear-end traction without compromising everyday drivability

Whether you’re building a road car, track car or endurance racer, the SVS UL-Trac Rear ATB Limited Slip Differential delivers outstanding traction, predictable handling and the reliability expected from a premium British-engineered drivetrain component.

Note: Requires the use of 31 Spline Rear Differential Axle Shafts. To Purchase “Click Here”

Vehicle Compatibility:

– Nissan Skyline GT-R BNR32 (02/1993-)
– Nissan Skyline GT-R BCNR33 (Non V-Spec)
– Nissan Skyline GT-R BNR34 (Non V-Spec)
– Nissan Stagea C34 260RS WGNC34