Mahle W39379 Transmission Oil Pan Gasket

Transmission Oil Pan Gasket for 4L80-E Applications

The Mahle W39379 transmission oil pan gasket is an OEM-standard sealing solution for 4L80-E-equipped vehicles. Built with cork-rubber gasket material, it is made to provide a reliable seal at the transmission pan and help maintain clean, stable fluid containment.

Compatible With Chevrolet Express 2500, Chevrolet Silverado 2500 HD, GMC Sierra 1500 HD, and other 4L80-E applications across GM, Bentley, Rolls-Royce, Jaguar, Aston Martin, Cadillac, and Hummer platforms. Mahle W39379 is a direct-fit transmission oil pan gasket for service work where accurate sealing matters.

Key Features

• Transmission oil pan gasket for 4L80-E transmission applications
• Cork-rubber gasket material for a conforming seal
• OEM Standard item grade
• Brand: Mahle
• Part number: W39379
• Filter element not included
• No additional package contents

Detailed Description

Mahle W39379 is a transmission pan gasket engineered for vehicles using the 4L80-E automatic transmission. The cork-rubber construction helps the gasket seat evenly against the pan and case surfaces during transmission service. Mahle supplies sealing products used by OEMs and technicians worldwide, and this gasket follows that OE-style service approach for dependable fit and sealing performance. This part cross-references FEL-PRO TOS 18698 for the same application.

Use this gasket when servicing 1991-2009 Chevrolet and GMC trucks and vans, along with select Bentley, Rolls-Royce, Jaguar, Aston Martin, Cadillac, and Hummer models listed in the fitment data. The W39379 part number is also a useful reference when searching for a transmission oil pan gasket for Chevrolet Silverado 1500 HD, GMC Sierra 2500 HD, or Chevrolet Express 3500 4L80-E service.

What It Helps Address

• Transmission fluid seepage at the oil pan
• Poor sealing after pan removal and service
• Gasket compression loss from age and heat cycling
• Leak concerns during routine transmission maintenance
• Fitment issues when replacing a worn 4L80-E pan gasket

Installation Notes and Tips

Clean the pan rail and transmission case sealing surfaces before installation. Inspect the pan for distortion or damage that could affect sealing. Verify the vehicle uses the 4L80-E transmission before ordering, and match the gasket to the application listed for your Chevrolet, GMC, or other supported model. Recheck fastener torque after installation according to the vehicle service procedure.

Quality Assurance

Mahle sealing products are supplied to OEM and professional service standards, and this gasket is built as an OEM Standard replacement for transmission service.