SKP SK404018 Locking Hub

SKP SK404018 Locking Hub Overview

The SKP SK404018 locking hub gives you manual control over front axle engagement for trucks and SUVs that need dependable traction on demand. It supports two-wheel drive operation for improved fuel economy and switches to four-wheel drive when road or trail conditions call for added grip.

Built for heavy-duty use, this locking hub is a direct-fit driveline service part for select Ford F-250 Super Duty, Ford F-350 Super Duty, Ford F-250, Ford F-350, Dodge D250, Dodge D350, Chevrolet C3500, and GMC C3500 applications.

Key Features

• Manual locking hub operation for on-demand 4WD engagement
• 30-spline design for the listed axle applications
• 6-bolt mounting pattern
• Rugged construction for demanding driveline conditions
• Supports reduced front axle drag in 2WD operation
• SKP SK404018 replacement for select heavy-duty truck fitments

Fitment and Application Details

Compatible With 1999-2004 Ford F-250 Super Duty and 1999-2004 Ford F-350 Super Duty, this hub also fits 1978-1999 Ford F-250 and 1978-1997 Ford F-350. Additional coverage includes 1990-1993 Dodge D250 and 1990-1993 Dodge D350, plus 1988-1990 Chevrolet C3500, 1988 GMC C3500, and 1979-1982 GMC C3500.

This part cross-references AVM439 for the same application. The SKP SK404018 is a practical choice when you need a manual locking hub for older Ford, Dodge, Chevrolet, or GMC 4x4 driveline service.

What This Part Helps Address

• Front hub engagement problems in 4WD systems
• Loss of manual lock/unlock function at the wheel hub
• Reduced traction when the front axle does not engage properly
• Unwanted front axle drag when operating in 2WD
• Wear-related service needs on high-mileage driveline components

Installation Notes and Tips

Verify spline count, bolt pattern, and vehicle fitment before installation. Confirm the hub matches the axle and wheel-end configuration on your Ford F-250 Super Duty, Ford F-350 Super Duty, or other listed application. Clean the mounting surface thoroughly and inspect related driveline components for wear before final assembly.

Quality Assurance

SKP manufactures this locking hub as a rugged replacement part for demanding truck and off-road use. The SK404018 is built to meet the needs of manual hub service on the listed applications.