Blackline BMW 188 Diff E24,E28,E30,E34,E36,xE36,Z1,Z3

Fits:

E24 633csi, 635csi

E28 518i

E28 525i, 535i

E28 528i Manual

E30 325i Manual

E30 325ix Manual Rear

E30 M3

E34 524td Manual

E34 525i Automatic, Australian specification

E34 525i Manual

E34 530i, 535i

E36 323i Auto

E36 325i Manual and Automatic (Fitted by us on H2M with a 3.15:1 ratio) 

E36 328i Auto 3.07:1

E36 M3 3.0

E36 M3 Evo 3.2 with final drive 2227453

E36 M3 USA

X E36 NOT FOR final drive 1428373 (E36 328i manual with 2.93:1 ratio)

Z1 ALL

Z3 M Coupe

Z3 M Roadster

Helical LSD Advantages:-

Equal rotational speed to both wheels

Torque distributed according to traction

Minimal service requirements - no clutches

Quick reaction compared to viscous LSDs

Gentle and progressive engagement, low noise

Easily controlled power take-off and drifting

Gears and body manufactured from 8620 alloy steel

Direct replacement into stock differential

Blackline Helical LSD's - How They Work

The Blackline helical LSD's are torque biasing, that is they distribute torque between the wheels, loading more torque towards the wheel with the best traction thus improving performance and driveability. Especially in low grip situations.

The helical gearing manages the distribution of friction within the LSD. When torque is applied to the helical gear system it creates force that pushes the gear into the differential body, thus creating friction. Increases of torque, increases the thrust force directly proportional to the amount of torque. This allows the Blackline LSD to cope with considerable traction imbalance even under heavy power conditions, as would be the case on exiting a powered up corner. But at low torque conditions the LSD can differentiate quietly and smoothly, thus making the differential very suitable for normal road driving. The Blackline LSD uses the popular parallel axis helical geared configuration optimized for even load distribution. They are designed with a torque bias of 5:1 this means that if one wheel loses traction then the wheel with the most grip can receive five times as much torque as the wheel that is slipping. However, five times zero is still zero, so all these helical LSD's work best when both wheels are 'planted' and some traction is still available on the slipping wheel. In practice this is rarely a problem as there is always some 'drag' on the slipping wheel, however some drivers expertly use left foot braking to partially lock the spinning wheel.

Note - Helical LSD's work especially well when combined with modern anti-lock braking systems.