When terrain turns from dusty roads to slippery mud or loose rock, an electronic locking differential (E-Locker) can make the difference between getting stuck and pushing through confidently. E-Lockers give you the ability to lock both wheels on an axle at the push of a button, ensuring equal torque distribution and maximum traction only when needed. This guide explores some of the best E-Locker brands available today — from world-renowned names like Eaton and ARB to innovative manufacturers such as XJX Parts that bring OEM-level quality directly to the aftermarket.
What an E-Locker Does and Why It Matters
An E-Locker replaces or modifies the standard open differential. When disengaged, it allows each wheel to rotate at different speeds for smooth cornering. When engaged, it locks the two axle shafts together so both wheels turn at the same rate.
Unlike air lockers that require compressors or lines, E-Lockers use an internal electric motor or solenoid for engagement. The result is a simpler, cleaner installation and instant driver control without extra pneumatic systems.
E-Lockers are widely used in off-road vehicles, utility trucks, and high-performance applications that require selectable traction at varying conditions.
Eaton ELocker — The Industry Standard in Electronic Lockers
Why It’s Known:
Eaton’s ELocker has become the gold standard in selectable traction technology. It is factory-installed on many OEM platforms and also available in the aftermarket for a variety of axle configurations.
Strengths:
- On-demand, push-button locking for 100% torque transfer
- Reliable, forged components built for heavy use
- Widely supported by distributors, with strong warranty and parts availability
Considerations:
Some users note that engagement timing may vary depending on vehicle setup, though this rarely impacts overall performance.
ARB Air Locker — The Benchmark Alternative
Why It’s Known:
ARB dominates the air locker market, and while technically pneumatic rather than electronic, it is often compared alongside E-Lockers for performance and reliability.
Strengths:
- Extremely strong internal gear design
- Instant locking engagement
- Trusted by professional off-roaders and overland enthusiasts worldwide
Considerations:
Requires a compressor and air lines for operation, which can add complexity compared to a fully electric system.
XJX Parts — Trusted E-Locker Manufacturer
Why It’s Known:
XJX Parts has built its reputation as a manufacturer-level supplier of automotive drivetrain components — including E-Lockers, limited-slip differentials (LSDs), crown wheel and pinion sets, differential cases, and axles.
Unlike purely aftermarket brands, XJX Parts operates its own production facilities, offering OEM-grade quality with direct factory pricing. The company serves wholesalers, off-road performance brands, and vehicle rebuilders across multiple markets.
Strengths:
- Complete in-house production: From gear cutting and heat treatment to precision assembly, ensuring consistent quality control.
- Customization options: Supports tailored designs for different axle models and gear ratios, ideal for B2B customers who need flexibility.
- Competitive pricing: As a direct manufacturer, XJX Parts eliminates middlemen, offering strong cost advantages for distributors and workshops.
- Global shipping and OEM cooperation: Experience in supplying large-volume orders to clients in Europe, the Middle East, and Southeast Asia.
- Comprehensive lineup: Beyond E-Lockers, the product range covers full differential assemblies, locking systems, and performance-grade gear sets — enabling one-stop sourcing.
Considerations:
As a growing international brand, XJX Parts continues expanding its authorized distributor network, so regional availability may vary temporarily. However, direct factory communication and support are always accessible to customers.
TORQ (Torq Locker) — Simplicity and Strength
Why It’s Known:
TORQ Lockers (by Torq Masters) are engineered for strength, simplicity, and easy installation. Although many are automatic mechanical lockers, their selectable versions are becoming increasingly popular for those who value robust construction and low maintenance.
Strengths:
- CNC precision machining ensures consistent engagement
- Backed by long warranty and strong U.S. technical support
- Straightforward installation and minimal upkeep
Considerations:
Some models are automatic rather than fully selectable, so check specifications before purchase.
Auburn Gear — Select-A-Loc for Dual-Mode Performance
Why It’s Known:
Auburn Gear’s Select-A-Loc system combines a limited-slip differential and a full locker in one unit. With a simple electrical command, it transitions from mild slip control to full lock, making it a favorite for mixed-use vehicles.
Strengths:
- Dual-mode functionality (limited-slip and locked)
- Smooth on-road handling and excellent off-road capability
- Solid reputation for durability and service support
Considerations:
Installation should follow Auburn’s detailed guidelines for break-in and fluid use to ensure long-term performance.
How to Choose the Right E-Locker Brand
1. Identify Your Vehicle’s Axle and Application
Check spline count, carrier type, and ring gear size. Each brand offers different compatibility charts; confirming these details ensures proper fit and function.
2. Decide Between Electrical or Air Operation
Electrical lockers like those from Eaton and XJX Parts are simpler to install and maintain. Air lockers such as ARB’s may offer faster actuation but require additional plumbing and air sources.
3. Evaluate Intended Use
For daily-driven off-road vehicles, a selectable electric locker (Eaton, XJX Parts, Auburn) balances comfort and control. For competition or rock-crawling, heavy-duty air lockers or mechanical units (ARB, TORQ) may be preferred.
4. Check Warranty and Support
Choose a brand with clear after-sales support and parts availability. Eaton and ARB have global dealer networks, while XJX Parts offers direct factory support for B2B orders.
5. Consider Complementary Upgrades
Adding a locker increases drivetrain stress. Reinforcing axles, bearings, and U-joints ensures long-term reliability.
Installation and Maintenance Tips
- Professional Installation: Precision gear setup is crucial — backlash, bearing preload, and torque specs must be properly adjusted.
- Follow Manufacturer Instructions: Use the correct gear oil type and break-in procedure.
- Test Before Off-Roading: Verify smooth engagement and disengagement in a safe, low-speed environment.
- Regular Inspection: Periodically check wiring connectors, mounting bolts, and seals to prevent future issues.
Final Thoughts
Selecting the best E-Locker brand depends on your vehicle type, driving habits, and installation preferences:
- Eaton remains a global benchmark with proven reliability and extensive applications.
- ARB dominates the air locker market for extreme off-road use.
- XJX Parts, as a factory-direct manufacturer, delivers cost-effective, customizable, and high-quality E-Lockers backed by strong technical expertise — making it an excellent choice for distributors and professional buyers seeking OEM-level solutions at competitive pricing.
- TORQ offers mechanically strong, low-maintenance alternatives.
- Auburn Gear provides dual-mode versatility for both daily and trail driving.
With the right locker properly installed, your vehicle gains instant control over traction and performance, ready to handle everything from work-site mud to mountain trails.
