Pioneer Cables 749109 Automatic Transmission Case Gasket

Automatic Transmission Case Gasket for GM Applications

Pioneer Cables 749109 is an automatic transmission case gasket made for exact-fit replacement on a wide range of GM vehicles. It uses a cork and rubber construction for the side cover outer gasket location, helping restore a proper seal during transmission service.

Key Features

• Automatic transmission case gasket for side cover outer applications
• Cork and rubber material for sealing performance
• Exact-fit replacement from Pioneer Transmission Components
• Fits many Buick, Chevrolet, Cadillac, Oldsmobile, and Pontiac models
• Part number 749109 for easy identification

Detailed Description

This Pioneer Cables 749109 transmission gasket is built for vehicles using the side cover outer gasket position, including many Buick Century, Buick Regal, Chevrolet Lumina, Pontiac Grand Prix, and Oldsmobile Cutlass Supreme applications. It is listed across model years from 1984 through 1997, with fitment notes that identify specific transmission families such as 4T60-E, THM440/4T60/ME9, and related configurations where required. This part cross-references common OE-style applications for the same service location.

Pioneer Transmission Components are positioned as exact-fit replacement parts, making this gasket a practical choice for transmission reseal work where the original sealing surface needs to be restored. The cork and rubber construction is suited to the automatic transmission case gasket role and the outer side cover sealing area.

What It Is Used For

• Replacing a leaking side cover outer transmission gasket
• Restoring seal integrity during transmission service
• Addressing fluid seepage at the case cover interface
• Supporting reseal work on GM front-wheel-drive automatic transmissions
• Servicing vehicles such as Buick LeSabre, Chevrolet Lumina, and Pontiac Bonneville

Installation Notes and Tips

• Verify transmission family and notes before installation, especially on applications marked 4T60-E or THM440/4T60/ME9.
• Clean the mating surfaces thoroughly before fitting the gasket.
• Inspect the cover and case for warpage, damage, or old sealant residue.
• Confirm the gasket orientation matches the side cover outer position.
• Use the part number 749109 to confirm the correct replacement during ordering and service.

Quality Assurance

Pioneer Transmission Components are described by the manufacturer as exact-fit replacement parts, supporting accurate service fitment for the listed GM applications.