Anchor 3691 Automatic Transmission Mount - Rear Left

Automatic Transmission Mount for GM Applications

Anchor 3691 is a rear left automatic transmission mount built for select Chevrolet, Pontiac, and Oldsmobile applications. It supports the transmission assembly and helps reduce vibration transfer into the cabin, making it a direct-fit replacement for worn or damaged OE-style mounts.

Key Features

• Rear left automatic transmission mount for select GM vehicles
• Engineered to OEM standards using CAD/CAM-based design processes
• Uses natural rubber and Styrene Butadiene rubber for abrasion resistance and aging stability
• Rubber-to-metal bond secured with Chemlock bonding agent
• Durometer hardness is matched to vehicle application requirements
• Hydraulic mount design is used where OE application calls for added vibration control

Detailed Description

Anchor 3691 is designed for the rear left transmission position and is used on 1997-2003 Chevrolet Malibu, 2004-2005 Chevrolet Classic, 1999-2005 Pontiac Grand Am, 1999-2004 Oldsmobile Alero, and 1997-1999 Oldsmobile Cutlass. This automatic transmission mount helps locate the transmission securely while reducing noise and vibration from the drivetrain. It is a practical replacement for vehicles showing signs of mount wear, especially in Chevrolet Malibu and Pontiac Grand Am applications where drivetrain movement can become noticeable over time. This part cross-references Pioneer Automotive Industries 625261 for the same application.

What It Helps Fix

• Excess drivetrain vibration felt through the body or floor
• Transmission movement caused by a deteriorated rear left mount
• Clunking or shifting noise during acceleration and deceleration
• Misalignment related to a worn transmission support point
• Noise transfer from a damaged rubber-to-metal mount assembly

Installation Notes and Tips

Verify the rear left mounting location before installation and compare the original mount to the replacement part. Inspect surrounding brackets and fasteners for wear, corrosion, or damage before reassembly. For best results, replace the mount only after confirming the transmission and engine are properly supported during service.

Quality Assurance

Anchor designs this mount to OEM standards and uses hardened steel fasteners with heat-treated Grade 5 bolts where included by application. The rubber material is selected for durability, and the bonding process is intended to maintain a strong rubber-to-metal connection under normal drivetrain loads.