Electric Differential Locker HBE193 for Toyota 8.15″ RR, 12 Bolt RG, shim adjusted

HardBlock — The Most Reliable Electric Differential Locker Made in the USA

HardBlock is a powerful and dependable electric differential locking system, designed and manufactured in the USA.
At the core of its design is a patented mechanism that uses spherical locking elements to provide a solid mechanical lock and full torque transfer to both wheels.

Engagement is instant — simply press the button, and the locking mechanism securely activates even under load, at any moment when maximum traction is required.

Technical Features

• Electric locking principle — simple and maintenance-free operation with no compressor, air tank, or pneumatic lines required. Installation only requires connecting the system to the vehicle’s electrical circuit.
• Instant engagement — activation can occur at any speed, without stopping.
• Direct torque transfer — the design eliminates slippage or partial engagement.
• Gears and cross shafts — manufactured using hot forging technology from alloy steel, providing increased metal density and exceptional strength and wear resistance.
• Precision engineering — all components are CNC-machined to guarantee consistent performance and reliability under high torque loads.
• Proven in extreme conditions — over 200 engagement cycles in a single day during the Rainforest Challenge without failure.
• Easy installation — fits standard differential housings without modification. The kit includes a control switch and a complete wiring harness.

Innovation Without Compromise

You no longer need to choose between pneumatic and electric systems — HardBlock combines the best of both worlds. It retains the instant, dependable engagement of pneumatic lockers but completely eliminates compressors, hoses, and air leaks. The result is an electrically controlled system with mechanical strength, built to withstand extreme loads, perform in any temperature, and deliver reliable locking even in the toughest conditions.

Choose Reliability

Experience what HardBlock means — no compromises, only strength, reliability, and confidence in every engagement. Choose innovation made in the USA. Install HardBlock — and forget about the weak points of traditional lockers.