MasterPro A2321 Automatic Transmission Mount

Automatic Transmission Mount for Pontiac

MasterPro MRC Mounts A2321 is an OEM replacement automatic transmission mount built for select Pontiac applications. It uses a steel mount body with a rubber bushing to help maintain drivetrain support and reduce movement under load.

Compatible with 1965-1970 Pontiac Catalina and 1967-1970 Pontiac Bonneville, this transmission mount is a direct-fit style replacement for vehicles that need a standard replacement solution. The MasterPro MRC Mounts line focuses on OE-style hard parts for transmission service, and A2321 follows that approach with original-equipment-level specifications.

Key Features

• OEM replacement automatic transmission mount
• Steel mount construction with black rubber bushing
• Standard replacement grade for transmission service
• Meets or exceeds original equipment manufacturer specifications
• Mount type designed for direct replacement applications
• Mounting hole quantity: 2
• Stud quantity: 1

Product Details

MasterPro A2321 is engineered for Pontiac Catalina and Pontiac Bonneville automatic transmission mounting applications where a factory-style replacement is needed. The steel housing and rubber bushing are selected to support the transmission while helping isolate vibration through the drivetrain. This part cross-references Pioneer Automotive Industries 622321 for the same application.

Use A2321 when servicing a worn or damaged transmission mount on 1965-1970 Pontiac Catalina or 1967-1970 Pontiac Bonneville models. The part number A2321 is also referenced in interchange listings for related aftermarket cataloging, including Koyorad A2321.

Common Reasons for Replacement

• Excessive drivetrain movement during acceleration or shifting
• Visible cracking or separation in the rubber bushing
• Mount sagging or collapse from age and heat exposure
• Vibration or clunking felt through the chassis
• Transmission support loss after original mount wear

Installation Notes

Verify vehicle year, make, and model before installation. This mount uses two mounting holes and one stud, and mounting hardware is not included. Confirm the transmission mount location and inspect surrounding brackets and attachment points for wear, corrosion, or damage before installing the replacement.

Quality Assurance

MasterPro MRC Mounts A2321 is built as a standard replacement part that meets or exceeds original equipment manufacturer specifications for the listed Pontiac applications. The OE-style design supports consistent fitment for service work on Pontiac Catalina and Pontiac Bonneville automatic transmission mounts.