BMW E39 - E46 - E53 - E60 - E82 - E83 - E85 -E87 -E92

Differential ATB for all BMW´s models BMW E39, E46, E53, E60, E82, E83E, E85, E87, E89, E90/92 (exactly models see at EXTRA INFO).
For greater security of adaptability, check please attached drawing with measurements. 

QUAIFE, manufacturer of Automatic Torque Biasing (ATB) helicar gear limited slip differential, of recognized worldwide prestige since 1980. The quality of QUAIFE is well demonstrated in all its products, being currently one of the leading manufacturers in the manufacture of LSD differential, close ratio gearkits  and gearboxes.

Unlike a limited slip disc differential, the Quaife ATB self-lock is based on gears instead of plates or clutch plates for operation. This means that it is much softer and will never block, they are progressive and adjust according to the loss of traction.
It does not lose power in acceleration like some plate style differentials.
For its installation, modification is required, simply replace the original with the new ATB Quaife differential.
Ideal for a competition or for a sporty driving (rallys, circuits, mountain, trackday ... etc)
No maintenance is necessary for proper operation.
Safe, progressive and seamless in action, the Quaife ATB differential never ‘locks’

• Controlled power is transmitted to all driven wheels, to maximise traction and minimise wheelspin, particularly in slippery conditions
• Fitment greatly reduces unwanted torque steer, understeer or oversteer
• Designed to work in harmony with road car electronic stability and traction control programs
• Improves braking performance on front wheel drive cars by reducing lock up and minimising ABS intrusion due to torque transfer action
• Reduces tyre wear, especially on front wheel drive cars
• Gear operated with no service components to replace – ever
• Direct replacement for factory standard ‘open’ differential unit
• Retains normal axle lubrication systems and maintenance schedule
• Recomended for Motorsport use and trackday. 

E39
520d, 530d, 525i, 525d Auto, 528i, 530i, 535i, 535i Auto, 
E46
320d Manual grupo 7556669, 320d Auto, 323i, 330i, 330i Auto, 330dX, 330dX Auto, 328i M y Auto grupo 1428128, 
328i Auto grupo 7518807.
E53
X5 3.0d manual 
E60
520d, 525d auto a partir 03/2007, 530i 
E82
118d, 120d, 123d con grupo 7566224
E83
X3 2.0d, 3.0d
E85
Z4 3.0i manual o SMG 
E87
116d, 120d, 120d auto hasta 02/2007, 123d grupo 7566224 
E89
Z4 2.8i Auto
E90-92
316d, 316d auto, 318d, 318d auto, 320d grupo 2.56:1, 325i grupo 7566172, 330dX Auto,