Westar ST-2998 Suspension Strut Mount - Rear

Rear Suspension Strut Mount for GM Full-Size Cars

Westar ST-2998 is a rear suspension strut mount built for select Buick, Cadillac, Oldsmobile, and Pontiac applications. It provides the mounting and isolation points needed to keep the strut assembly aligned while reducing road noise and vibration in the cabin.

Key Features

• Creates a pivot point for the suspension so it can rotate within proper geometry for steering response and tire wear control
• Locks the strut and body together for secure rear suspension mounting
• Includes a noise-dampening design to reduce road noise and vibration transfer into the vehicle
• Built with application-specific materials and a protective finish for durability and appearance
• Direct replacement for rear strut mount service on compatible GM vehicles

Product Details

Westar ST-2998 is a suspension strut mount for the rear position on compatible vehicles including 2006-2011 Buick Lucerne, 2006-2011 Cadillac DTS, 2000-2005 Buick LeSabre, 1997-2005 Buick Park Avenue, 2000-2005 Cadillac DeVille, 2000-2005 Pontiac Bonneville, 1998-2004 Cadillac Seville, 2001-2003 Oldsmobile Aurora, 1995-1999 Oldsmobile Aurora, and 1995-1999 Buick Riviera. This part cross-references Monroe Shocks & Struts 902998 for the same application. The ST-2998 is engineered to restore the mounting interface between the strut and body while helping maintain suspension movement and cabin comfort.

Common Problems This Part Addresses

• Clunking or knocking from the rear suspension
• Excess vibration transmitted through the body
• Loose or worn strut-to-body mounting points
• Reduced steering stability caused by worn suspension geometry components
• Premature tire or suspension component wear related to mount deterioration

Installation Notes and Tips

Verify rear-position fitment by year, make, and model before installation. On vehicles such as Buick Park Avenue and Cadillac Seville, confirm whether the car is equipped with electronic adjustable suspension, since some listed applications exclude that configuration. Inspect the surrounding strut components, upper mounting surfaces, and related hardware condition during service to ensure the replacement mount seats correctly.

Quality Assurance

Westar manufactures this strut mount using application-specific materials and a finish intended to support long-term durability. Part number ST-2998 is built for the rear suspension service needs of compatible Buick, Cadillac, Oldsmobile, and Pontiac models.