BlackLine Helical Gear LSD Ford Cortina Escort English Axle Helical Gear
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BlackLine Helical Gear LSD Ford Cortina Escort English Axle Helical Gear
Product code: MLR.BDR
Product weight: 6000 grams
Web Price: £359.99
Product description

BlackLine Part No: HLF011
Helical Gear Limited Slip Differential

Suitable For:
  • Ford English axle (22 spline - Salisbury/Timken type)
  • Escort Mk1
  • Escort Mk2
  • Cortina Mk1
  • Cortina Mk2
  • Anglia 105E
  • Prefect 107E
  • Kit Cars

Not Suitable For:

  • Atlas axle
  • Capri or Cortina Mk3/4/5
On Ford English axles the diff is removed from the front as a complete unit, on Atlas axles the diff is removed from the rear via an inspection plate.

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

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