Blackline BMW E46 E52 E6x E8x E9x 210K Axle Limited Slip Differential

The Blackline limited slip differential for BMWs with a 210K rear axle, also known as an LSD (Limited Slip Differential), improves traction by distributing torque between the two-wheel drive systems 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 push against the differential housing and generate the internal friction necessary for this torque distribution. The system can thus handle a significant difference in traction 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 everyday 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 HLF221 limited slip differential is designed for various compatible BMW models equipped with the 210K rear axle. It features a 10-bolt ring gear with a 153 mm center distance, 14.5 mm mounting holes, and a 37 mm offset. Its housing and gears are made of high-resistance 8620 steel.

Technical Specifications of the Blackline Limited Slip Differential for BMWs with 210K Rear Axle

Manufacturer Part Number: HLF221
Quaife application match: QDF10N
Type: Helical-gear limited slip differential
Vehicle compatibility: BMW E31, E38, E39, E46, E52, E60, E61, E63, E65, E83, E86, E90, E92
Type of axle: 210K
Ring gear: 10 bolts
Ring gear center distance: 153 mm
Bolt hole diameter: 14.5 mm
Offset: 37 mm
Torque split ratio: 5:1
Housing and gear material: High-resistance 8620 steel
Mounting: Replaces the stock differential

Key features of the Blackline limited slip differential for BMW with 210K 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.
• 5:1 torque split.
• No friction discs for reduced maintenance requirements.
• Housing and gears made of high-resistance 8620 steel.
• Specifically designed for the BMW 210K rear axle.

Note: BMW differential mountings may vary depending on the model, engine, transmission, year, and final drive ratio. Before ordering, verify the sizes and specifications of your original differential.