Pioneer Cables 871004 Automatic Transmission Flexplate

Automatic Transmission Flexplate Overview

Pioneer Cables 871004 is an automatic transmission flexplate built to restore OEM-level performance in a range of classic GM applications. It is manufactured from high-grade steel, formed to original dimensions, and precision balanced to factory specifications for consistent operation.

This SFI-approved flexplate includes a 29.1 certification rating and an SFI certification sticker. With 153 teeth and a 12.828-inch outside diameter, it is a fitment-focused replacement for vehicles such as Chevrolet Camaro, Chevrolet Caprice, and Pontiac Firebird applications that require the correct tooth count and converter interface.

Key Features

• Part number: 871004
• Automatic transmission flexplate for GM rear-wheel-drive applications
• 153-tooth ring gear for proper starter engagement
• 12.828-inch outside diameter
• Built from high-grade steel for strength and consistency
• Automated welding process for uniform construction
• Precision balanced to factory specifications
• SFI approved with 29.1 certification rating
• SFI certification sticker included
• Pitch flywheels: 12-14

Detailed Description

Pioneer Cables 871004 is engineered as a direct replacement automatic transmission flexplate for select Buick, Chevrolet, Oldsmobile, and Pontiac vehicles from 1969 through 1985. The 153-tooth design and 12.828-inch diameter are important for correct starter alignment, converter fit, and drivetrain operation in applications such as Chevrolet El Camino, Oldsmobile Cutlass, and Pontiac Grand Prix. The plate is built from high-grade steel, welded with an automated process for repeatable strength, and balanced to factory specs to help maintain smooth engine and transmission operation.

This part cross-references common OE-style flexplate applications for the same vehicle families and transmission setups.

What It Helps Solve

• Starter engagement issues caused by worn or incorrect tooth count
• Vibration from an out-of-balance flexplate
• Cracks or fatigue in an aging automatic transmission flexplate
• Fitment problems from incorrect diameter or converter pattern selection
• SFI compliance needs for performance-oriented builds

Installation Notes and Tips

Verify tooth count, outside diameter, and converter application before installation. Confirm the vehicle’s transmission and emissions configuration, since some listed fitments vary by lock-up converter, California emissions, or THM400 exclusions. Inspect the starter, torque converter, and crankshaft flange for wear before installing the new flexplate. Follow factory service procedures and torque specifications during assembly.

Quality Assurance

Pioneer Cables manufactures this flexplate to original dimensions and balances it to factory specifications for consistent fit and operation. The SFI approval and included certification sticker provide documented compliance for applications that require it.

• Fits 1981-1985 Buick Regal, N/A
• Fits 1978 Buick Regal, N/A
• Fits 1982-1985 Chevrolet Camaro, N/A
• Fits 1980 Chevrolet Camaro, N/A
• Fits 1985 Chevrolet Caprice, N/A
• Fits 1969 Chevrolet Caprice, N/A
• Fits 1977-1985 Chevrolet Caprice, N/A
• Fits 1984-1985 Chevrolet Corvette, N/A
• Fits 1979-1985 Chevrolet El Camino, N/A
• Fits 1977-1985 Chevrolet El Camino, N/A
• Fits 1971-1974 Chevrolet El Camino, N/A
• Fits 1984-1985 Chevrolet Impala, N/A
• Fits 1969 Chevrolet Impala, N/A
• Fits 1977-1985 Chevrolet Impala, N/A
• Fits 1971-1973 Chevrolet Impala, N/A
• Fits 1979-1985 Chevrolet Monte Carlo, N/A
• Fits 1978-1985 Chevrolet Monte Carlo, N/A
• Fits 1985 Oldsmobile Cutlass, N/A
• Fits 1981 Oldsmobile Cutlass, N/A
• Fits 1978-1979 Oldsmobile Cutlass, N/A
• Fits 1985 Oldsmobile Cutlass Supreme, N/A
• Fits 1982-1983 Oldsmobile Cutlass Supreme, N/A
• Fits 1978-1979 Oldsmobile Cutlass Supreme, N/A
• Fits 1983-1985 Pontiac Bonneville, N/A
• Fits 1981-1985 Pontiac Firebird, N/A
• Fits 1971-1974 Pontiac Firebird, N/A
• Fits 1981-1985 Pontiac Grand Prix, N/A
• Fits 1978 Pontiac Grand Prix, N/A
• Fits 1980-1985 Pontiac Parisienne, N/A
• Fits 1984 Oldsmobile Cutlass Calais, N/A
• Fits 1982 Oldsmobile Cutlass Calais, N/A
• Fits 1978-1980 Oldsmobile Cutlass Calais, N/A
• Fits 1979-1983 Chevrolet Malibu, N/A
• Fits 1977-1983 Chevrolet Malibu, N/A
• Fits 1973-1974 Chevrolet Malibu, N/A
• Fits 1982-1983 Oldsmobile Cutlass Cruiser, N/A
• Fits 1980-1983 Pontiac Grand LeMans, N/A
• Fits 1978 Pontiac Grand LeMans, N/A
• Fits 1982 Buick LeSabre, N/A
• Fits 1981-1982 Oldsmobile Delta 88, N/A
• Fits 1981 Buick Century, N/A
• Fits 1978 Buick Century, N/A
• Fits 1981 Chevrolet Bel Air, N/A
• Fits 1971-1973 Chevrolet Bel Air, N/A
• Fits 1977-1981 Chevrolet Camaro, N/A
• Fits 1971-1974 Chevrolet Camaro, N/A
• Fits 1981 Chevrolet Caprice, N/A
• Fits 1980-1981 Pontiac Catalina, N/A
• Fits 1980-1981 Pontiac Laurentian, N/A
• Fits 1980-1981 Pontiac LeMans, N/A
• Fits 1978 Pontiac LeMans, N/A
• Fits 1971-1974 Pontiac LeMans, N/A
• Fits 1979-1980 Buick Century, N/A
• Fits 1979-1980 Buick Regal, N/A
• Fits 1980 Chevrolet Caprice, N/A
• Fits 1980 Chevrolet Impala, N/A
• Fits 1980 Oldsmobile Cutlass, N/A
• Fits 1980 Oldsmobile Cutlass Cruiser, N/A
• Fits 1980 Oldsmobile Cutlass Salon, N/A
• Fits 1980 Oldsmobile Cutlass Supreme, N/A
• Fits 1979-1980 Pontiac Grand LeMans, N/A
• Fits 1980 Pontiac Laurentian, N/A
• Fits 1979-1980 Pontiac LeMans, N/A
• Fits 1975-1979 Chevrolet Monza, N/A
• Fits 1977-1979 Chevrolet Nova, N/A
• Fits 1972-1975 Chevrolet Nova, N/A
• Fits 1978-1979 Oldsmobile Cutlass Salon, N/A
• Fits 1976-1979 Oldsmobile Starfire, N/A
• Fits 1979 Pontiac Grand Prix, N/A
• Fits 1976-1979 Pontiac Sunbird, N/A
• Fits 1976 Chevrolet Monza, N/A
• Fits 1972-1974 Chevrolet Blazer, N/A
• Fits 1972-1974 Chevrolet C10 Suburban, N/A
• Fits 1972-1974 Chevrolet C20 Suburban, N/A
• Fits 1972-1974 Chevrolet K10 Suburban, N/A
• Fits 1972-1974 Chevrolet K20 Suburban, N/A
• Fits 1973-1974 GMC G15/G1500 Van, N/A
• Fits 1973-1974 GMC G25/G2500 Van, N/A
• Fits 1973-1974 GMC G35/G3500 Van, N/A
• Fits 1973-1974 GMC Jimmy, N/A
• Fits 1969-1973 Chevrolet Camaro, N/A
• Fits 1969-1973 Chevrolet El Camino, N/A
• Fits 1973 Chevrolet Malibu, N/A
• Fits 1969-1972 GMC G15/G1500 Van, N/A
• Fits 1969-1972 GMC G25/G2500 Van, N/A
• Fits 1971-1972 GMC Jimmy, N/A
• Fits 1971 Chevrolet Blazer, N/A
• Fits 1971 Chevrolet C10 Suburban, N/A
• Fits 1971 Chevrolet C20 Suburban, N/A
• Fits 1971 Chevrolet K10 Suburban, N/A
• Fits 1971 Chevrolet K20 Suburban, N/A
• Fits 1969 Chevrolet Bel Air, N/A
• Fits 1969 Chevrolet Blazer, N/A
• Fits 1969 Chevrolet K10 Suburban, N/A
• Fits 1969 Chevrolet K20 Suburban, N/A