About Us

Meet Our Owner

Frank Gilliland, the owner of South Bay Truck & Differential, has over 50 years of experience in this field, and his work has been featured several times in national magazines such as off-road magazine and 4Wheel & Off-Road Magazine.

We started working on differentials from World War 2 jeeps then evolved into blazers, off-road trucks, and racecars.

Specialized Gear Work

We offer specialized gear work for high-performance jeeps and 4x4 vehicles. Our specialists work with every customer to find the best solution for their vehicle, budget, and needs.

Our 4x4 repairs, custom modification, and gear works increase your vehicle’s off-roading capability and usability.

Drive Like a Champion

We offer 4x4 custom modifications for cars, trucks, and jeeps for a better off-road experience.

Modifying your suspension and gears allows you to handle a steep terrain like a champion and install larger tires if necessary.