4x4 & Off-Road in Rialto, CA

Full-service drivetrain specialists serving Southern California for over 32 years. We specialize in differential repair and rebuilds, including gear replacement, bearing service, limited-slip rebuilds, locker installation, and ratio changes. Our shop handles both manual and automatic transmission repairs, rebuilds, and replacements for all vehicle types. We also provide expert 4WD and AWD transfer case diagnostics, repairs, and fluid service. Whether you need stock drivetrain repairs or custom 4x4 builds with axle swaps and gear upgrades, we've got you covered.