Gates 90K-38138B Serpentine Belt Drive Component Kit

Accessory Belt Drive Kit for Ford F-150

The Gates Accessory Belt Drive Kit 90K-38138B restores the serpentine drive system with matched components for belt, tensioner, and idler service. It is built for Ford F-150 applications where the accessory drive needs a complete refresh, not just a belt replacement.

Key Features

• Complete serpentine belt drive component kit for accessory drive service
• Includes an OE-equivalent belt, tensioner, idler pulley, and required service hardware
• Belt dimensions: 103.67 in. outside circumference and 0.807 in. top width
• Kit contents reference belt K061031, tensioner assembly 38138, idler pulleys 36327 and 38001
• Fits 1997-2004 Ford F-150 and 2004 Ford F-150 Heritage applications listed below

Product Details

Gates 90K-38138B is part of the Accessory Belt Drive Kit line, which packages the belt drive service components needed to restore the front-end accessory system together. For Ford F-150 owners, this approach helps address wear across the belt path at the same time, rather than replacing only the belt and leaving aged tensioning or pulley components in place. This part cross-references Monroe Shocks & Struts (e.g., DBK061031B) for the same application.

Compatible With 1997-2000 Ford F-150, N/A, W/8-Point Drive; Accessory Belt Drive Kit. Compatible With 2001-2004 Ford F-150, N/A, W/A.C.; Accessory Belt Drive Kit. Compatible With 2004 Ford F-150 Heritage, N/A, W/A.C.; Accessory Belt Drive Kit. The Gates 90K-38138B kit is specified for these vehicle configurations and should be matched to the listed belt drive setup before ordering.

Common Problems This Kit Can Address

• Squealing or chirping from a worn serpentine belt
• Belt tracking issues caused by aging idler pulleys
• Loss of proper belt tension from a worn tensioner assembly
• Premature belt wear from mixed-age accessory drive components
• Repeated front accessory drive service on Ford F-150 models

Installation Notes and Tips

Verify the vehicle’s year, engine accessory layout, and notes before installation. This kit is listed for 1997-2000 Ford F-150 with W/8-Point Drive and 2001-2004 Ford F-150 plus 2004 Ford F-150 Heritage with W/A.C. applications. Compare the existing belt routing and component part numbers to the kit contents before service, and follow the included installation instructions and tech tips for accurate setup.

Quality Assurance

Gates positions this Accessory Belt Drive Kit as a complete service solution for restoring the serpentine drive system with OE-equivalent components. The kit format supports a full accessory drive refresh using matched parts for the listed Ford F-150 applications.