41 - Everything you want to know at diffs, lockers and eLockers with Heath Moore

41 - Everything you want to know at diffs, lockers and eLockers with Heath Moore

Author: James Eling | Amateur Off Roader, unorganised camper and very poor fisherma December 11, 2018 Duration: 35:23

The difference between air lockers and eLockers is one of the most popular discussion points on the 4x4earth forum, so we decided to get an expert in to discuss the difference.

Heath is the General Manager at Harrop Engineering.  He drives a Harrop Superado, an Holden Colorado with an upgunned V8 Harrop supercharger engine. 

Harrop was started in 1955 by Len Harrop in the northern suburbs of Melbourne.  His son had the Harrop Howler, a very fast quarter miler. Heath talks about how Harrop has transitioned about from supporting the Australian vehicle manufacturing industry to exporting components for vehicles like the Toyota Tundra.

We discuss what exactly an eLocker is and how it works with the diff.  Heath talks about how the eLocker passes the 300,000 km durability testing.  Originally developed by Eaton for the military, the eLocker is designed for reliability and durability.  An electromagnet is actuated to engage the diff locking mechanism.

Harrop has developed a range of 4 pinion designs for a large range of vehicles.  The gears, splines and internal housings are manufactured in Australia.

We talk about what kinds of driving conditions and tracks you would use a selectable locker for.  We also talk about the difference between front and rear lockers and when you would choose either. 

We discuss the next innovations for Harrop, like the PX3.

How hard is an eLocker to fit?  We look at whether it is a DIY solution or if it should be fitted professionally.

A great Aussie manufacturing story with some great innovation and big export wins.

Join the conversation about  the 4x4earth podcast on the 4x4earth forum.  www.4x4earth.com is Australia's largest free and independent 4 wheel driving website with over 200,000 visits per month.

If you are loving 4x4earth.com, check out the 4x4earth Merch.  The sales help to keep Australia's largest free and independent 4 wheel drive website and the largest Australian 4x4 Podcast!  It helps us to keep on doing the work to keep tracks open.


There’s a certain kind of freedom found down a dirt track, beside a remote campsite, or at the edge of a quiet river. 4x4 Earth-The 4WD, Camping, Fishing and Outdoors podcast. is about finding that freedom, without pretending to be an expert. Hosted by James Eling-a self-described amateur off-roader, unorganised camper, and very poor fisherman-this podcast feels more like a conversation with a mate who’s just as eager to learn as you are. You’ll hear genuine explorations of four-wheel driving, from vehicle mods and recovery techniques to navigating those hidden tracks. The discussion naturally extends to what happens after you’ve stopped the engine: the bush cooking, the often-humorous attempts at fishing, and the simple art of enjoying a place most people never see. It’s a practical guide that prioritises safety and respecting the environment, ensuring the adventures remain sustainable. Tune in for a down-to-earth blend of stories, hard-won tips, and the shared curiosity that turns a trip into a proper expedition. This podcast is for anyone who believes the journey and the destination are equally important.
Author: Language: English Episodes: 50

4x4 Earth - The 4WD, Camping, Fishing and Outdoors podcast.
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