TRE 4x4 Electric Differential Locker — Fast-Acting, Selectable Locker

Instant traction at the flick of a switch — the TRE 4x4 Electric Differential Locker (e-locker) delivers true 100% lock on demand without the need for an onboard air system. Unlike a diff air locker (pneumatic), the TRE electric locker uses a sealed 12V solenoid actuator for fast, reliable engagement. Designed for drivers who want the strength of a selectable locking differential with simplified installation and fewer components to maintain.

Key features

• Selectable electric diff locker (e-locker) — 100% traction when needed, open for normal driving.
• Simple installation — no airlines, solenoids or compressors required; powered by 12V wiring loom and dash switch.
• Sealed actuator — waterproof and dustproof design for reliable performance in harsh conditions.
• Forged 4320 alloy gears & case — built to handle big tyres, torque and heavy loads.
• Low-maintenance — fewer moving parts compared to pneumatic lockers; no risk of airline leaks.
• 5-year warranty with UK-based OFM4x4 UK support.

What’s included

• TRE 4x4 Electric Differential Locker assembly
• Wiring loom with relays
• Dash switch (on/off control)
• Fittings & install hardware

Not included: carrier bearings/shims and gear oil. Professional installation recommended.

Benefits of electric vs air lockers

• No compressor required — saves cost and space, easier wiring vs a full pneumatic setup.
• Instant lock response — solenoid engages rapidly when power is applied.
• Lower maintenance — no airlines or seals to service.
• Ideal for daily-driven 4x4s that need occasional off-road traction.

Installation & setup

• Install the carrier and set the backlash/bearing preload according to the axle specification.
• Wire harness to 12V ignition supply via relay; mount the dash switch within reach of the driver.
• Ensure waterproofing of connectors for off-road durability.

You might also need

• Other Differential Lockers — compare Air, Crab and Electric models.
• On-board Air Compressors — for tyres and accessories, if you run mixed locker systems.
• Air Accessories — manifolds, fittings, pump-up kits (for air lockers/tyres).

FAQs

1) What is an electric diff locker or e-locker?
A differential locker that uses an electric actuator instead of air pressure to lock the differential gears together, providing 100% traction instantly.

2) How is it different from an air locker?
Electric lockers require no air or compressors. They’re powered by 12V wiring and engage via a sealed solenoid, making them simpler to install and maintain.

3) Do I still need a compressor?
No. Unlike pneumatic lockers, the TRE electric locker does not require an air system. A compressor is only needed for tyre inflation or other air accessories.

4) Is it waterproof?
Yes — the actuator and solenoid are sealed against dust and water ingress for reliability in wet and muddy environments.

5) What’s included?
Locker assembly, wiring loom, relays, dash switch and fittings. Carrier bearings and shims are not included.

6) Is it strong enough for large tyres?
Yes — forged 4320 alloy gears and case ensure durability under heavy torque loads.

7) Is it road-legal?
A selectable locker behaving like an open differential when disengaged does not by itself establish road approval. Compatibility and lawful use depend on the exact vehicle, installation and destination. Follow the manufacturer's engagement instructions; do not engage on high-grip road surfaces or where doing so could impair safe steering or handling.

8) What’s the warranty?
5-year warranty against manufacturing defects. UK support available from OFM4x4.

Explore related categories: Differential Lockers • Air Compressors • Air Accessories