The Blackline limited slip differential for the Volkswagen Golf Mk1, Golf Mk2, Jetta, Passat, and Scirocco with 020 transmission and a 109 mm ring gear—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 out of 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 improves traction during spirited driving while maintaining handling suitable for road use.
The Blackline limited slip differential uses a parallel-axis helical gear architecture optimized to distribute forces. Its 5:1 torque split means that when one wheel 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. Its effectiveness is therefore optimal when both wheels maintain a minimum level of resistance. This technology also works particularly well in conjunction with modern ABS systems.
The Blackline HLF061/109 limited slip differential is designed for Volkswagen Golf Mk1, Golf Mk2, Jetta, Passat, and Scirocco models equipped with a 020 transmission and a 109 mm ring gear. This size is an important factor to verify before mounting in order to select the correct version of the limited slip differential. It installs as a direct replacement for the original differential, and both its housing and gears are made of high-strength 8620 steel.
Technical specifications of the Blackline limited slip differential for Volkswagen Golf, Jetta, Passat, and Scirocco with 020 transmission
Manufacturer Part Number: HLF061/109
Quaife application equivalent: QDF1R/109
Type: Helical-gear limited slip differential
Vehicle compatibility: Volkswagen Golf Mk1, Golf Mk2, Jetta, Passat, and Scirocco
Type de boîte: 020
Ring gear diameter: 109 mm
Torque split ratio: 5:1
Housing and gear material: High-resistance 8620 steel
Mounting: Direct replacement for the original differential
Key features of the Blackline limited slip differential for Volkswagen with 020 housing and 109 mm ring gear
- Torque split between the wheels based on available traction.
- Transmits more torque to the wheel with the best traction.
- Immediate and progressive reaction to changes in traction.
- Smooth, progressive, and quiet operation.
- No friction discs for reduced maintenance requirements.
- Power delivery that is easily controllable, especially during spirited driving and drifting.
- Housing and gears made of high-resistance 8620 steel.
- Direct mounting for the original differential.
Products intended for vehicle modification for competition purposes may render their use prohibited on public roads, insofar as they significantly alter the vehicle's characteristics as specified in the type-approval certificate issued by the relevant authorities (noise level, pollutant emissions, maximum speed, tire dimensions, etc.).
