An e locker gives the driver control over when both wheels on an axle turn at the same speed. A factory open differential allows those wheels to rotate at different speeds while cornering. Off road, available drive can be limited by the wheel with less traction. Engaging a Harrop ELocker locks the axle side to side so the wheel with grip can keep driving.
When disengaged, the differential operates normally for everyday driving. The locker is selected from a dash-mounted switch when additional traction is required, then disengaged before returning to sealed or other high-traction surfaces. Correct use matters because a locked differential prevents the two wheels from rotating at different speeds through a corner.
Need it fitted? Our Ferntree Gully and Pakenham workshops supply and install everything in this range. Not sure which option suits your vehicle? Call our friendly staff on
1300 633 762 before you order.
KEY CATEGORIES AND WHAT THEY ARE BUILT FOR
FRONT ELOCKERS
A front diff locker can help when articulation or a steep loose climb unloads one front wheel. Fitment is vehicle-specific, so the axle, differential design and listed application must be checked before ordering.
REAR ELOCKERS
A rear diff locker is a common first choice for touring and technical 4WD builds. The rear often carries more load, and locking it can maintain drive when one rear wheel loses traction.
FRONT AND REAR BUILDS
Front and rear lockers provide driver-controlled locking at both axles. This arrangement suits vehicles built for more demanding articulation, rock, mud and steep loose terrain. Tyres, suspension and driver technique remain important parts of the overall setup.
WHY CHOOSE A HARROP ELOCKER
A Harrop ELocker uses electrical actuation. It does not need the compressor, air tank or air lines required by a pneumatic system. For a vehicle without an existing air system, that can mean a more direct installation layout. This electric diff lock still requires correct differential setup and protected electrical routing.
The decision should account for the complete build rather than the locker alone. Existing equipment, available mounting space, intended terrain and the required front or rear application can all affect the right approach. Compare those details with the listed application before ordering. If you are not sure, reach out to our friendly staff.
VEHICLE-SPECIFIC KITS WE STOCK
Products in this collection include Harrop ELocker applications for selected front and rear differentials. Current catalogue fitments include:
LandCruiser 40, 60, 70 and 80 Series A9378 applications.
FJ Cruiser, LandCruiser 03-19 and Hilux 05-21 front fitment.
Hilux 97-05 non-clamshell front fitment.
Ranger PX and PX2, plus Mazda BT-50 UP and UR, front fitment.
Ranger PJ and PK, plus Mazda BT-50 UN, rear fitment.
Colorado 08-20 and Trailblazer 16-17 front fitment.
Navara D23 NP300 2015-20 rear fitment for 3.69 gearing and up.
Challenger 98-08, Pajero 83-21 and Triton 86-21 rear fitment, 9 inch and 28 spline.
Model name and year are not always enough to identify a differential. Gearing, housing design and axle details may also matter. Compare the vehicle make, model, year and relevant driveline information with the listed application before supply or installation. If you are not sure, reach out to our friendly staff.
CHOOSE BY USE CASE: FRONT, REAR OR BOTH
For many touring builds, the rear is the practical place to start. It carries the vehicle load and can lose traction on steep or uneven terrain. A rear locker also leaves the front differential open, which retains normal differential action at the steering axle while the locker is disengaged or not fitted.
A front locker becomes relevant when front-wheel traction is the recurring limit, including steep loose climbs and situations where articulation unloads a front wheel. It should be selected for the actual differential rather than from the vehicle badge alone.
Front and rear locking suits more demanding technical use. It is not automatically necessary for every touring vehicle. Consider the terrain, existing traction aids, tyres, suspension and how often the vehicle encounters cross-axle conditions. If you are not sure, reach out to our friendly staff.
THE HARROP ELOCKER RANGE
Harrop is the only vendor represented in this collection. A Harrop ELocker must match the particular differential and vehicle application, whether fitted to the front or rear axle. That specificity is important because locker selection depends on the internal differential configuration.
The useful distinction is driver control. The locker remains disengaged for normal differential operation and is electrically selected when the terrain requires additional traction. It must still be installed, wired and operated correctly. A product match alone does not replace checking the complete differential specification.
WHAT A QUALITY ELOCKER INSTALLATION INVOLVES
An ELocker installation is substantial differential work. The differential is disassembled, the carrier is removed and the Harrop ELocker is installed for the relevant application. Gear mesh and pinion preload must be set to factory specification before reassembly. Oil is replaced, with bearings addressed where required by the condition of the differential.
The electrical work includes a dash switch, fused power supply, relay and wiring to the differential-mounted actuator. Routing and protection matter in a 4WD exposed to water, dust, vibration and underbody contact. The switch must also be positioned to reduce accidental operation.
Our Ferntree Gully and Pakenham workshops handle Harrop ELocker fitting from differential setup through to wiring and operational testing. Send us a service enquiry with the vehicle, intended front or rear fitment and any known differential details to discuss the work involved and arrange a booking. If you are not sure, reach out to our friendly staff.
Submit a service enquiry with your vehicle details, or email sales@ultimateoffroad.com.au, and our friendly staff will confirm fitment, quote the work and arrange a booking at Ferntree Gully or Pakenham.
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