The Blackline limited slip differential for the Audi TT, Audi A3, Seat Leon, Skoda Fabia, Octavia, and Volkswagen Golf 4 with a 6-speed 02M transmission, also known as an LSD (limited slip differential), improves traction by distributing torque between the two-wheel drive drive wheels based on available grip.
Its helical gear design allows the limited slip differential to transmit more torque to the wheel with the best traction. As torque increases, the gears exert pressure against the differential housing and generate the internal friction necessary for this torque distribution. The system can thus handle a significant difference in drive force between the two wheels, particularly during heavy acceleration when exiting a turn or when traction is limited.
Under light loads, the helical limited slip differential maintains smooth, progressive, and quiet operation. The wheels can continue to rotate at different speeds when necessary, particularly when cornering. This feature enhances traction during spirited driving while maintaining handling suitable for road use.
The Blackline limited slip differential uses a parallel-shaft helical gear architecture optimized to distribute forces. Its 5:1 torque split means that when one of the wheels loses traction, the wheel with the most traction can receive up to five times the torque transmitted to the spinning wheel.
As with any helical-gear limited slip differential, a minimum amount of resistance must remain on the wheel with the least grip to allow torque transfer. It is therefore most effective when both wheels retain a minimum amount of resistance. This technology also works particularly well in conjunction with modern ABS systems.
The Blackline HLF064 limited slip differential is designed for the Audi TT with a front differential, the front-wheel-drive Audi A3, the Seat Leon, the Skoda Fabia, the Skoda Octavia, and the front-wheel-drive Volkswagen Golf 4 equipped with the 02M 6-speed transmission. It installs as a direct replacement for the original differential on compatible vehicles. Its housing and gears are made of high-resistance 8620 steel.
Manufacturer Part Number: HLF064
Quaife application equivalent: QDF13R
Type: Helical-gear limited slip differential
Audi compatibility: Audi TT and A3 (2WD)
Seat compatibility: Seat Leon 2WD
Skoda compatibility: Skoda Fabia and Skoda Octavia
Volkswagen compatibility: Volkswagen Golf 4 – 2 drive wheels
Transmission type: 02M 6-speed gearbox ratio
Torque split ratio: 5:1
Housing and gear material: High-resistance 8620 steel
Mounting: Direct replacement for the original differential on compatible models
