Moog K8439 Rack and Pinion Bellows Kit - Left

Moog K8439 Rack and Pinion Bellows Kit

Restore protection for the steering rack with the Moog K8439 rack and pinion bellows kit. Built with nitrile material, an 11-rib design, and a vent hole, this bellows helps shield the rack from dirt, moisture, and road debris while allowing normal steering movement.

Compatible with a wide range of Ford, Mercury, and Lincoln vehicles, including Ford Taurus, Ford Mustang, and Mercury Sable applications, this Moog K8439 bellows kit is built for direct-fit service on supported rack and pinion setups.

Key Features

• Nitrile construction for durable steering rack protection
• 11-rib bellows design for flexible movement
• Vent hole included for proper pressure equalization
• Hardware included for installation
• Ties included for secure attachment
• Length: 9.070 inches
• Moog K8439 replacement for steering rack service

Detailed Description

The Moog K8439 is a rack and pinion bellows kit engineered to protect the steering gear from contamination and wear. Its nitrile material offers dependable resistance for undercar conditions, while the ribbed construction supports steering travel without binding. The vent hole helps manage air movement inside the bellows, and the included hardware and ties simplify replacement during steering service. This part cross-references Mevotech Supreme MK8439 for the same application.

Use this part when servicing compatible Ford Taurus, Ford Mustang, Mercury Sable, and related steering systems that require a rack and pinion bellows replacement. The Moog K8439 is also listed for additional Ford, Mercury, and Lincoln applications across model years from 1978 through 2007.

What It Helps Fix

• Cracked or torn steering rack bellows
• Contamination entering the rack and pinion assembly
• Loss of protection around the inner tie rod area
• Steering rack exposure to road debris and moisture
• Worn bellows that no longer seal properly

Installation Notes and Tips

Verify rack style and application notes before installation, especially on vehicles with specific steering configurations such as Ford design racks, one-piece aluminum housing, externally threaded racks, or TRW rack and pinion exceptions. Confirm fitment for the exact year, make, model, and steering setup before replacing the bellows. Fits 1986-2007 Ford Taurus, N/A; Fits 1986-2005 Mercury Sable, N/A; Fits 1987-2003 Ford Escort, N/A; Fits 1995-2003 Ford Windstar, N/A; Fits 1984-2002 Ford Mustang, N/A; Fits 1991-1999 Mercury Tracer, N/A; Fits 1993-1998 Lincoln Mark VIII, N/A; Fits 1986-1997 Ford Aerostar, N/A; Fits 1989-1997 Ford Thunderbird, N/A; Fits 1984-1997 Mercury Cougar, N/A; Fits 1996 Mercury Tracer, N/A, with Externally Threaded Rack # SPR-EF; Fits 1992-1995 Mercury Tracer, N/A, 1 Piece Design Rack & Pinion; Fits 1987-1994 Ford Tempo, N/A, with FORD Design; with 1 Piece Aluminum Housing; Fits 1988-1994 Lincoln Continental, Left; Fits 1987-1994 Mercury Topaz, N/A, with FORD Rack & Pinion; with 1 Piece Aluminum Housing; Fits 1984-1992 Lincoln Mark VII, N/A; Fits 1991 Mercury Tracer, N/A, 2 Piece Design Rack & Pinion; Fits 1980-1988 Ford Thunderbird, N/A, 1 Piece Design Rack & Pinion; Fits 1982-1987 Lincoln Continental, N/A; Fits 1983-1986 Ford LTD, N/A; Fits 1979-1986 Mercury Capri, N/A, 1 Piece Design Rack & Pinion; Fits 1983-1986 Mercury Grand Marquis, N/A; Fits 1983-1986 Mercury Marquis, N/A; Fits 1984 Ford Mustang, N/A, Except TRW Rack & Pinion; Fits 1978-1983 Ford Fairmont, N/A, 1 Piece Design Rack & Pinion; Fits 1979-1983 Ford Mustang, N/A, 1 Piece Design Rack & Pinion; Fits 1980-1983 Mercury Cougar, N/A, 1 Piece Design Rack & Pinion; Fits 1978-1983 Mercury Zephyr, N/A, 1 Piece Design Rack & Pinion.

Quality Assurance

MOOG chassis components are developed with ongoing design updates aimed at improving service life and making replacement easier. The K8439 follows that approach with a service-ready bellows design for supported steering applications.