Moog K8678 Suspension Ball Joint - Front Upper

MOOG K8678 Front Upper Ball Joint

MOOG K8678 is a greaseable front upper suspension ball joint built for direct-fit service on select Ford, Lincoln, and Mercury full-size sedans. It uses a bolt-on, 2-bolt mounting design and neoprene construction to support dependable steering and suspension performance.

Compatible with 1995-2002 Ford Crown Victoria, 1995-2002 Lincoln Town Car, and 1995-2002 Mercury Grand Marquis, this MOOG ball joint is a practical OE-style replacement for front upper suspension service. The K8678 part number is also commonly searched as a replacement for related aftermarket and OE cross-reference applications.

Key Features

• Greaseable design for routine lubrication service
• Neoprene material for suspension sealing support
• Standard suspension grade type
• Bolt-on (2-bolt) mounting type
• Maximum outside diameter: 1.920 in.
• Non-adjustable front upper ball joint
• Castle nut and cotter pin hole not included

Detailed Description

MOOG K8678 is engineered as a front upper suspension ball joint for vehicles that use a bolt-on mounting layout. The greaseable design supports maintenance access, while the neoprene construction helps provide a durable sealing surface in everyday driving conditions. For shoppers searching for a front upper ball joint for Ford Crown Victoria, Lincoln Town Car, or Mercury Grand Marquis, K8678 offers a direct replacement option with application-specific fitment.

This part cross-references Dorman OE Solutions 536-548 for the same application. The K8678 part number is also listed among interchange references for multiple aftermarket catalogs, making it easier to verify replacement options during suspension repair.

What It Helps Address

• Front-end looseness from worn upper ball joint wear
• Steering play or imprecise road feel
• Suspension noise from degraded joint components
• Uneven tire wear related to front suspension wear
• Maintenance needs on greaseable suspension joints

Installation Notes and Tips

Confirm front upper fitment before ordering, since this part is specific to the listed applications. Inspect the surrounding control arm, fasteners, and steering components during replacement, and follow the vehicle service procedure for torque and alignment checks after installation. Because this is a bolt-on 2-bolt design, verify mounting-hole alignment and hardware condition before assembly.

Quality Assurance

MOOG backs this ball joint with superior materials and rigorous testing to support reliable performance and easier installation. The K8678 is built for consistent service in compatible Ford, Lincoln, and Mercury front suspension applications.