ATP Parts SG-27 Automatic Transmission Oil Pump Gasket

Automatic Transmission Oil Pump Gasket

ATP Parts SG-27 is an exact-fit automatic transmission oil pump gasket for the pump cover to case position. It is built for direct replacement service on a wide range of GM rear-wheel-drive and truck applications, including Chevrolet C10, GMC C1500, and Buick Regal models.

Key Features

• Exact-fit replacement from ATP Parts
• Automatic transmission oil pump gasket for pump cover to case sealing
• Fits THM350C applications noted in the catalog fitment
• Direct replacement for common GM truck and passenger car transmissions
• Cross-references Pioneer Automotive Industries 749073 for the same application
• Part number SG-27 for easy catalog matching

Detailed Description

ATP Transmission Seals and Gaskets are made as direct replacement parts with application-specific fitment. SG-27 is used at the automatic transmission oil pump cover-to-case interface, where a precise seal is needed to maintain fluid control and support proper transmission operation. This part number is listed across a broad range of Chevrolet, GMC, Buick, Oldsmobile, Pontiac, and Cadillac vehicles from 1978 through 1986, including Chevrolet C10, GMC C1500, and Buick Regal applications. If you are sourcing an automatic transmission oil pump gasket for a GM THM350C or related transmission service, SG-27 is the catalog-matched part number to verify.

This part cross-references Pioneer Automotive Industries 749073 for the same application.

What It Is Used For

• Replacing a leaking automatic transmission oil pump gasket at the pump cover to case joint
• Restoring sealing integrity during transmission pump service
• Addressing fluid seepage around the transmission pump cover area
• Supporting rebuild or reseal work on GM automatic transmissions
• Matching service parts for Chevrolet C10, GMC C1500, and Buick Regal fitments

Installation Notes and Tips

Confirm transmission type before installation, especially on listings marked for THM350C or THM250C/M31, THM350, THM350C applications. Clean both sealing surfaces thoroughly, inspect the pump cover and case for damage, and verify the gasket aligns with the pump cover to case position before assembly. Use the vehicle and transmission listing to confirm fitment for your exact year and model, including Chevrolet C10, GMC C1500, and Buick Regal applications.

Quality Assurance

ATP Parts positions this gasket as an exact-fit replacement part for transmission sealing service. The catalog fitment and interchange data help confirm application accuracy for SG-27 across the listed GM vehicles and transmission families.