Pioneer Cables 748023 Automatic Transmission Gasket Set

Automatic Transmission Gasket Set for THM200-4R Service

Pioneer Cables 748023 is an automatic transmission gasket set for resealing service on select GM rear-wheel-drive applications. It is built for internal transmission work where the unit has been disassembled and needs fresh gaskets, seals, O-rings, and related sealing components.

• Automatic transmission gasket set for leak repair and reseal service
• Includes application-specific gaskets, seals, O-rings, pan gasket, rubber lip seals, metal clad seals, and sealing rings
• Fits select vehicles with THM200-4R coverage noted in the fitment data
• Part number 748023 for transmission rebuild and internal service identification
• Compatible with select Cadillac, Chevrolet, Buick, Oldsmobile, and Pontiac models

Fitment Coverage

• Fits 1987-1990 Cadillac Brougham, w/o servo lip seals
• Fits 1981-1990 Chevrolet Caprice, w/o servo lip seals
• Fits 1989 Pontiac Firebird, w/o servo lip seals
• Fits 1987-1989 Pontiac Safari, w/o servo lip seals
• Fits 1982-1988 Chevrolet Monte Carlo, w/o servo lip seals
• Fits 1982-1987 Buick Regal, w/o servo lip seals
• Fits 1982-1987 Chevrolet El Camino, w/o servo lip seals
• Fits 1985-1987 Oldsmobile Cutlass Salon, w/o servo lip seals
• Fits 1983-1987 Pontiac Grand Prix, w/o servo lip seals
• Fits 1981-1986 Cadillac Fleetwood, w/o servo lip seals
• Fits 1985-1986 Oldsmobile Cutlass, w/o servo lip seals
• Fits 1983-1986 Pontiac Bonneville, w/o servo lip seals
• Fits 1981 Pontiac Bonneville, w/o servo lip seals
• Fits 1982-1986 Pontiac Parisienne, w/o servo lip seals
• Fits 1981-1985 Buick LeSabre, w/o servo lip seals
• Fits 1981-1985 Chevrolet Impala, w/o servo lip seals
• Fits 1981-1985 Oldsmobile Custom Cruiser, w/o servo lip seals
• Fits 1984-1985 Oldsmobile Cutlass Ciera, w/o servo lip seals; Only Fits THM200-4R
• Fits 1981-1985 Oldsmobile Delta 88, w/o servo lip seals
• Fits 1982-1984 Cadillac DeVille, w/o servo lip seals
• Fits 1981-1984 Oldsmobile 98, w/o servo lip seals
• Fits 1982-1984 Oldsmobile Cutlass Supreme, w/o servo lip seals
• Fits 1982-1983 Chevrolet Malibu, w/o servo lip seals
• Fits 1982-1983 Oldsmobile Cutlass Cruiser, w/o servo lip seals
• Fits 1981 Chevrolet Bel Air, w/o servo lip seals; Only Fits THM200-4R
• Fits 1981 Pontiac Catalina, w/o servo lip seals
• Fits 1981 Pontiac Parisienne, w/o servo lip seals; Only Fits THM200-4R

Common Repair Uses

• Transmission fluid leaks from aged seals or gaskets
• Internal resealing during transmission disassembly
• Service work on a THM200-4R transmission
• Replacement of worn sealing components during overhaul
• Leak diagnosis tied to pan, case, or internal sealing surfaces

Installation Notes

Verify transmission type before ordering, especially on 1981 Chevrolet Bel Air, 1981 Pontiac Parisienne, and 1984-1985 Oldsmobile Cutlass Ciera applications that note THM200-4R coverage. Match all sealing surfaces carefully during reassembly and confirm the vehicle-specific note for w/o servo lip seals before installation. Part number 748023 is commonly searched for GM transmission reseal service, including Cadillac Brougham and Chevrolet Caprice applications.

Quality Assurance

Pioneer Transmission Repair Kits are organized as pre-packaged service kits for transmission reseal work, with components selected for the listed application. Part number 748023 follows the manufacturer’s application-specific coverage for select GM vehicles.