Blackline Limited Slip Differential - Opel Astra - Kadett - Corsa - Calibra - F16, F18, F20, F28 Transmissions

The Blackline limited slip differential for Opel Astra, Kadett, Corsa, Cavalier, Calibra, and Vectra with F16, F18, F20, or F28 in two-wheel drive configurations—also known as an LSD (limited slip differential)—improves traction by distributing torque between the two 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 traction to allow torque transfer. It is therefore most effective when both wheels remain in contact with the ground. This technology also works particularly well in combination with modern ABS systems.

The Blackline HLF040 limited slip differential is designed for Opel F16, F18, F20, and F28 transmissions in two-wheel-drive configurations. For applicable F28 transmission applications, mounting requires 38 mm bearings. The housing and gears are made of high-strength 8620 steel.

Technical Specifications of the Blackline Limited Slip Differential

Manufacturer Part Number: HLF040
Quaife application equivalent: QDF2B
Type: Helical-gear limited slip differential
Type of box: F16, F18, F20, and F28
Drivetrain: 2WD only
Torque split ratio: 5:1
Housing and gear material: High-resistance 8620 steel
Mounting: Direct replacement for the original differential
Compatibility: Opel Astra, Kadett, Nova, Corsa A, Corsa B, Cavalier Mk3, Calibra, and Vectra
Note F28: 2WD configuration with 38 mm wheel bearings

Key Features of the Blackline Limited Slip Differential

• 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.