Pioneer Cables 749079 Automatic Transmission Oil Pump Gasket

Automatic Transmission Oil Pump Gasket for GM Applications

Pioneer Cables 749079 is an automatic transmission oil pump gasket made for pump-to-case sealing in a wide range of GM and related vehicles. It is an exact-fit replacement part from Pioneer Transmission Components, built for direct service use where the transmission pump meets the case.

• Automatic transmission oil pump gasket
• Pump-to-case sealing location
• Exact-fit replacement from Pioneer Transmission Components
• Cross-references Dorman - HELP 13901 for the same application
• Part number: 749079

Vehicle Fitment

• Fits 1978-1987 Buick Regal, pump to case.
• Fits 1984-1987 Chevrolet Caprice, pump to case.
• Fits 1977-1981 Chevrolet Caprice, pump to case.
• Fits 1984-1987 Chevrolet El Camino, pump to case.
• Fits 1978-1981 Chevrolet El Camino, pump to case.
• Fits 1978-1987 Chevrolet Monte Carlo, pump to case.
• Fits 1987 Oldsmobile Custom Cruiser, pump to case.
• Fits 1984-1985 Oldsmobile Custom Cruiser, pump to case.
• Fits 1978-1981 Oldsmobile Custom Cruiser, pump to case.
• Fits 1985-1987 Oldsmobile Cutlass Salon, pump to case.
• Fits 1977-1980 Oldsmobile Cutlass Salon, pump to case.
• Fits 1977-1987 Oldsmobile Cutlass Supreme, pump to case.
• Fits 1983-1987 Pontiac Grand Prix, pump to case.
• Fits 1978-1981 Pontiac Grand Prix, pump to case.
• Fits 1985-1986 Pontiac Acadian, pump to case; only fits TH200, THM200, THM200/M29, THM200C/MV9.
• Fits 1983-1986 Pontiac Bonneville, pump to case.
• Fits 1980-1981 Pontiac Bonneville, pump to case.
• Fits 1983-1986 Pontiac Parisienne, pump to case.
• Fits 1984-1985 Buick LeSabre, pump to case.
• Fits 1977-1981 Buick LeSabre, pump to case.
• Fits 1984-1985 Chevrolet Impala, pump to case.
• Fits 1977-1981 Chevrolet Impala, pump to case.
• Fits 1984-1985 Oldsmobile Cutlass Ciera, pump to case; only fits TH200, THM200, THM200/M29, THM200C/MV9.
• Fits 1984-1985 Oldsmobile Delta 88, pump to case.
• Fits 1977-1981 Oldsmobile Delta 88, pump to case.
• Fits 1982-1984 Chevrolet Camaro, pump to case.
• Fits 1980 Chevrolet Camaro, pump to case.
• Fits 1976-1984 Chevrolet Chevette, pump to case.
• Fits 1982-1984 Chevrolet S10, pump to case.
• Fits 1983-1984 Chevrolet S10 Blazer, pump to case.
• Fits 1982-1984 GMC S15, pump to case.
• Fits 1983-1984 GMC S15 Jimmy, pump to case.
• Fits 1976-1984 Pontiac Acadian, pump to case.
• Fits 1980-1984 Pontiac Firebird, pump to case.
• Fits 1978-1983 Chevrolet Malibu, pump to case.
• Fits 1976-1982 Chevrolet LUV, pump to case.
• Fits 1981-1982 Isuzu Pickup, pump to case.
• Fits 1978-1981 Buick Century, pump to case.
• Fits 1980-1981 Cadillac DeVille, pump to case.
• Fits 1980-1981 Cadillac Fleetwood, pump to case.
• Fits 1981 Chevrolet Bel Air, pump to case; only fits TH200, THM200, THM200/M29, THM200C/MV9.
• Fits 1981 Oldsmobile 98, pump to case.
• Fits 1977-1981 Oldsmobile Cutlass, pump to case.
• Fits 1979-1981 Oldsmobile Cutlass Calais, pump to case.
• Fits 1980-1981 Oldsmobile Cutlass Cruiser, pump to case.
• Fits 1980-1981 Pontiac Catalina, pump to case.
• Fits 1978-1981 Pontiac LeMans, pump to case.
• Fits 1977-1980 Chevrolet Monza, pump to case.
• Fits 1978-1980 Oldsmobile 98, pump to case; pump to case.
• Fits 1977-1980 Oldsmobile Starfire, pump to case.
• Fits 1978-1980 Pontiac Grand Am, pump to case.
• Fits 1976-1980 Pontiac Sunbird, pump to case.
• Fits 1979 Chevrolet Nova, pump to case.
• Fits 1976-1977 Chevrolet Nova, pump to case.
• Fits 1977-1979 Pontiac Phoenix, pump to case.
• Fits 1976-1978 Buick Skylark, pump to case.
• Fits 1978 Cadillac Seville, pump to case; pump to case.
• Fits 1977 Buick Skyhawk, pump to case.
• Fits 1977 Oldsmobile Omega, pump to case.
• Fits 1977 Pontiac LeMans, pump to case; only fits TH200, THM200, THM200/M29, THM200C/MV9.

What This Gasket Helps Address

• Transmission fluid seepage at the pump-to-case joint
• Poor sealing after transmission pump service
• Leak concerns during automatic transmission rebuild or repair
• Replacement needs for worn or damaged pump gaskets

Installation Notes and Tips

Install at the automatic transmission pump-to-case interface and verify the transmission family before assembly. Several listed applications require TH200, THM200, THM200/M29, or THM200C/MV9 coverage, so confirm the transmission code against the vehicle before ordering. Clean both sealing surfaces thoroughly and inspect the pump and case for damage before installation.

Quality Assurance

Pioneer Transmission Components positions this gasket as an exact-fit replacement part for direct service use. Part number 749079 is built for the listed applications and cross-references Dorman - HELP 13901 for the same application.