BlackLine Helical Gear LSD BMW 1 3 5 6 7 Series
Enlarge Image
BlackLine Helical Gear LSD BMW 1 3 5 6 7 Series
Product code: MLR.BSE/BMW
Product weight: 7000 grams
Web Price: £559.98
Product description
BLACKLINE 188K Medium Case 10 Bolt Crown Wheel LSD

BlackLine Part No: HLF023
Helical gear Limited Slip Differential

Suitable For:
The 188K differential among others are most commonly used in 6 cylinder versions of the following models:
  • E82 123d auto / 125i / 128i manual / 135i auto
  • E87 118d auto / 120d auto 03/2007-09/2008 / 123d auto / 130i
  • E46 318d auto / 320i manual with 188L casing / 323i auto / 325i / 325ti / 325xi / 328i 3.46:1 ratio / 330i auto
  • E90 320d auto with 7591017 diff / 320d manual with 7591074 diff / 320i with 188K casing / 325i auto / 328i auto / 325i manual with 7591015 diff / 328xi manual / 330i / 335i auto with 7572055 diff / 335xi auto
  • E92 320d auto with 7591017 diff / 325i auto / 328i / 325i manual with 7529109 & 7591015 diff / 330i / 335i auto with 7572055 diff / 335xi auto
  • E39 520i manual / 523i
  • E60 520d auto / 520i / 525i auto / 525i SMG / 530i auto / 535i auto / 535xi auto
  • F10 535i auto / 535i manual
  • E63 630i
  • E38 728i auto
  • F01 740i - check diff fitted / 740li - check diff fitted
  • E83 2.0d auto rear / 3.0i manual rear
  • E53 3.0i manual rear diff / 4.4i auto rear diff / 4.6is auto rear diff
  • E70 3.0d auto rear
  • E85 Alpina Roadster S 3.4 / 2.5i / 3.0si / 2.5si SMG / 3.0i auto
  • E89 2.3i S Drive / 3.0i S Drive
Not Suitable For:
  • M3 or M models
  • 168 / 188 / 188L / 210 differentials
  • Please make sure that this item is suitable for your model before purchase, or contact us - some models may have technical issues making this unit unsuitable

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 driveabitily. 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 proprotional 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 optimised 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.

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

The Benefits Are:
  • Applies equal rotational speed to both wheels
  • Distributes torque according to available traction
  • Minimum servicing compared to plate type LSD's
  • Low noise
  • Controlled power on launches and drifting slides
  • Progressive engagement
  • Easier car control
  • Optimum gear tooth design and oil distribution
  • Gears and Body Manufactured from 8620 material
  • Direct replacement for stock differential
This is a Torque Biasing Helical Gear LSD. These are generally regarded as a nicer road LSD as they have little side effects during normal driving (unlike plate type LSD's that constantly resist differing wheels speeds during cornering) They do not require a special oil. We recommend that the axle oil is changed after the first 500 miles as initially they can create swarf - this is normal and will reduce with use.

Note: This is not a plate type, viscous coupling or clutch pack LSD.

  • Assembled differential unit only
  • Bearings, gears, gaskets/seals etc are not included

Designed for Motorsport use
No instructions included