Electric Differential Lockers | HardBlock
HardBlock designs and manufactures high-performance electric differential lockers built for demanding off-road use. Since 2019, we have been developing our patented locking technology to deliver exceptional strength, fast engagement, and reliable performance in extreme conditions. In 2024, our locking system was granted U.S. Patent No. 12,092,195.
Why Choose HardBlock
HardBlock is built for drivers who want the strength of a serious off-road locker without the complexity of an air system. We combine a high-load mechanical design with simple electric control.
HardBlock advantages:
• Patented ball-locking mechanism — engineered for high torque and shock loads.
• 100% mechanical differential lock — both axle shafts are positively locked together when engaged.
• Engagement while driving — without a strict vehicle speed limitation.
• Built for direction changes under load — designed to handle sudden transitions between forward and reverse.
• Active demagnetization — helps provide fast, reliable disengagement even while the vehicle is moving.
• Simple electric system — push-button operation with no compressor, air lines, valves, or related failure points.
• Fewer components — easier installation, operation, and maintenance.
HardBlock — professional-grade strength. Simple electric control. No unnecessary systems or limitations.
Where HardBlock Lockers Prove Their Strength
From deep mud and rocky trails to steep climbs and demanding off-road terrain, HardBlock is built for the conditions where traction matters most.
Tested in real-world off-road use and competition, our lockers are designed to perform when the drivetrain is pushed hard and the terrain leaves no room for compromise.
Built for real trails. Proven under real load.
That’s HardBlock.
Built to Last. Backed for Life
We stand behind HardBlock — from the moment your locker ships to the years you put it to work.
Lifetime Warranty on the Locking Mechanism
Our lifetime warranty covers the core load-bearing components of the HardBlock locking system: the locking pockets in the gear, the steel locking balls, and the corresponding locking pockets in the locking ring.
6-Month Money-Back Guarantee — Even After Installation
Install it. Use it. Put it to the test. If for any reason HardBlock isn’t right for you, return it within 6 months — even after installation and use — and we’ll refund your purchase.
3-Year Product Warranty
All other HardBlock locker components are covered by a 3-year limited warranty.
Protected & Tracked Shipping
Every HardBlock order is carefully packed and shipped with tracking. If your order is lost or damaged in transit, we’ll make it right.
Built for serious off-road use. Backed by guarantees that let you put it to the test with confidence.
MADE IN USA
We manufacture our electric differential lockers in the USA, ensuring high quality and reliability for every vehicle