MasterPro A5458HY Automatic Transmission Mount

Automatic Transmission Mount for GM Applications

MasterPro MRC Mounts A5458HY is an OEM replacement automatic transmission mount built for select GM vehicles with manual transmissions in the fitment data. It uses a steel mount body with a rubber bushing and fluid-filled cushion to help support the transmission and manage drivetrain movement. This part is a direct-fit style replacement for service work on Buick Enclave, Chevrolet Traverse, GMC Acadia, GMC Acadia Limited, and Saturn Outlook applications listed below.

The MRC Mounts line focuses on standard replacement parts that meet or exceed original equipment manufacturer specifications. For buyers searching for a transmission mount for 2009-2017 Buick Enclave, 2009-2017 Chevrolet Traverse, or 2009-2017 GMC Acadia service, A5458HY provides an OE-style solution with the correct mount construction for the application.

Key Features

• OEM replacement automatic transmission mount
• Steel mount construction with black rubber bushing
• Fluid-filled cushion type for drivetrain support
• Standard replacement grade
• Meets or exceeds original equipment manufacturer specifications
• Mount type matched to OE-style service replacement needs
• Compatible with select Buick, Chevrolet, GMC, and Saturn applications

Detailed Product Overview

MasterPro A5458HY is engineered as a transmission mount replacement for vehicles that require a standard OE-style mount assembly. The steel housing and rubber bushing are paired with a fluid-filled cushion design to help isolate vibration and support the transmission under load. This makes it a practical choice when replacing a worn automatic transmission mount on a Buick Enclave, Chevrolet Traverse, or GMC Acadia.

This part cross-references Anchor 3191 and General Motors 25840451 for the same application. It is also listed with interchange references from Power Torque B3191 and Westar EM-4036.

Fitment

• Fits 2009-2017 Buick Enclave, N/A
• Fits 2009-2017 Chevrolet Traverse, N/A
• Fits 2009-2017 GMC Acadia, N/A
• Fits 2017 GMC Acadia Limited, N/A
• Fits 2009-2010 Saturn Outlook, N/A

What This Part Helps Address

• Excess drivetrain movement from a worn transmission mount
• Vibration transferred into the cabin during acceleration or idle
• Clunking or shifting feel caused by deteriorated mount support
• Mount failure from age, fluid loss, or rubber separation
• OE-style replacement needs during transmission service

Installation Notes

Verify vehicle fitment by year, make, and model before installation. This mount does not include mounting hardware, a mounting bracket, or instructions. Inspect surrounding drivetrain components and mounting points for wear or damage before installing the replacement part. Confirm the application matches the listed GM vehicles, including Buick Enclave, Chevrolet Traverse, and GMC Acadia configurations shown in the fitment data.

Quality Assurance

MasterPro MRC Mounts A5458HY is built as a standard replacement part that meets or exceeds original equipment manufacturer specifications. The OE replacement design supports direct service use on the listed applications and follows the construction expected for factory-style transmission mount replacement.