All Quaife-BMW ATB differentials are stocked and distributed by our exclusive distributor Kevin Bird Garages.
2 The Ridgeway
Tel: 01753 657444
Click here for full product lists, information, technical documentation and ordering.
The Quaife ATB Differential for the BMW Z4 range replaces the vehicle's standard open differential. The ATB Differential is available for both the 1st and 2nd generations of BMW's sportscar, the E85 and E89 respectively. We recommend you speak to Birds Auto who will be able to advise which differential will be required for your application.
The Quaife ATB Helical LSD differential transforms your cars performance by substantially reducing or eliminating wheelspin, preventing the onset of traction control intervention, thus maintaining full engine power and acceleration on demand.
Unlike a conventional limited slip differential, the Quaife ATB Helical LSD differential relies on gears rather than clutch plates for its operation. That means it is much smoother in operation, and does not cause any interference with the standard traction and stability control electronics. The Quaife ATB Helical LSD differential never locks harshly with a set pre-load of wheel slip across the driven axle, like a conventional clutched LSD. Rather, the Quaife ATB Helical LSD differential automatically biases the torque away from the spinning wheel across the axle, to a constantly varying degree, and never locks.
Quaife ATB Helical LSD differentials have many benefits over a standard open differential, including maximising traction and minimizing wheel spin. They also eliminate the torque steer and snatching compared to conventional LSD units, and are a maintenance-free design retaining the standard oil lubrication and specifications.
The Quaife ATB Helical LSD differential is proven in circuit and drag racing, rallying and road use, is produced from Corus steel billets, and is CAD designed, CNC machined, then inspected to the rigorous ISO 9001 standard. With over 1,250 different applications, the Quaife ATB Helical LSD differential is second to none. Accept no imitations! Quaife ATB Helical LSD differentials are used by Ford, General Motors and Daimler-Chrysler as original equipment.
The Quaife ATB Helical LSD differential comes with a lifetime warranty (subject to terms and conditions).