Blackline Limited-Slip Differential - Ford Escort - Cortina - Anglia - Prefect - English 22-spline Axle

The Blackline limited slip differential for the Ford Escort, Cortina, Anglia, and Prefect with an English 22-spline axle, 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 improves traction during spirited driving while maintaining handling suitable for on-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 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 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 conjunction with modern ABS systems.

The Blackline HLF011/22 limited slip differential is designed for the Ford English rear axle equipped with original 22-spline differential shafts. It is particularly suitable for the Ford Escort Mk1 and Mk2, Cortina Mk1 and Mk2, Anglia 105E, and Prefect 107E. This 22-spline version is not intended for truss-reinforced 16- or 18-spline driveshafts. Its housing and gears are made of high-resistance 8620 steel.

Technical Specifications of the Blackline Limited Slip Differential for Ford with English 22-spline Axle

Manufacturer Part Number: HLF011/22
Quaife application equivalent: QDF5Z/22
Type: Helical-gear limited slip differential
Vehicle compatibility: Ford Escort Mk1, Escort Mk2, Cortina Mk1, Cortina Mk2, Anglia 105E, Prefect 107E, and compatible kit cars
Type of axle: Ford English
Number of splines: 22
Differential shafts: Original 22-spline type
Not compatible with: Trussed shafts with 16 or 18 splines
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 Ford with English 22-spline axle

• Torque split between the wheels based on available traction.
• Delivers 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.