Moog K8739T Steering Idler Arm

Steering Idler Arm for Ford Trucks and SUVs

The MOOG K8739T steering idler arm is built for direct replacement on select Ford, Lincoln, and related applications that use a 2-1/2 inch mounting hole spacing. It includes a pre-greased design, a castle nut, and a grease fitting to support serviceable steering performance on vehicles such as the Ford F-150, Ford Expedition, and Lincoln Navigator.

Key Features

• Part number: K8739T
• Pre-greased for initial installation
• Castle nut included
• Grease fitting included for routine maintenance
• Length: 138.0 mm / 5.433 in
• Mounting hole diameter: 63.5 mm / 2.500 in
• Fits applications with 2-1/2 inch between mount holes

Fitment Details

• Fits 1997-2004 Ford F-150, N/A, with 2-1/2 (in) between mount holes; includes powdered-metal Gusher bearing to allow grease to penetrate bearing surfaces.
• Fits 2004 Ford F-150 Heritage, N/A, with 2-1/2 (in) between mount holes; includes powdered-metal Gusher bearing to allow grease to penetrate bearing surfaces.
• Fits 1997-2002 Ford Expedition, N/A, with 2-1/2 (in) between mount holes; includes powdered-metal Gusher bearing to allow grease to penetrate bearing surfaces.
• Fits 2002 Lincoln Blackwood, N/A, with 2-1/2 (in) between mount holes; includes powdered-metal Gusher bearing to allow grease to penetrate bearing surfaces.
• Fits 1998-2002 Lincoln Navigator, N/A, with 2-1/2 (in) between mount holes; includes powdered-metal Gusher bearing to allow grease to penetrate bearing surfaces.
• Fits 1997-1999 Ford F-250, N/A, with 2-1/2 (in) between mount holes; includes powdered-metal Gusher bearing to allow grease to penetrate bearing surfaces.

What This Part Helps Address

• Steering play or looseness at the front end
• Uneven steering response during lane changes or turns
• Excessive wear in the idler arm assembly
• Noise or clunking from worn steering linkage components
• Grease retention issues in serviceable steering parts

Installation Notes and Tips

Verify the mounting hole spacing measures 2-1/2 inches before ordering. This MOOG K8739T idler arm is listed for the Ford F-150, Ford Expedition, Lincoln Navigator, Lincoln Blackwood, Ford F-150 Heritage, and Ford F-250 applications shown above. The included grease fitting supports periodic lubrication after installation, and the pre-greased design helps simplify initial setup.

This part cross-references Mevotech Supreme MK8739T for the same application.

Quality Assurance

MOOG positions this chassis component as part of its Problem Solver line, with design updates focused on longer service life and easier replacement. The K8739T follows that approach with serviceable lubrication features and application-specific fitment for select Ford and Lincoln steering systems.