Pioneer Cables 871003 Automatic Transmission Flexplate

Pioneer Cables 871003 Flexplate for 1970-1976 Chevrolet Applications

Pioneer Cables 871003 is an automatic transmission flexplate built to restore OEM-level performance in select Chevrolet and GMC applications. It is made from high-grade steel, precision balanced to factory specifications, and SFI approved for added confidence in demanding driveline use.

Key Features

• Automatic transmission flexplate for select Chevrolet and GMC vehicles
• Built to original dimensions for proper starter and converter alignment
• High-grade steel construction for strength and durability
• Automated welding process for consistent weld quality
• Precision balanced to factory specs
• 168-tooth design with 14.125-inch outside diameter
• 1.177-inch center diameter and 12-14 pitch flywheel specification
• SFI Approved with SFI certification sticker included
• 29.1 certification rating

Detailed Description

This Pioneer Cables flexplate, part number 871003, is engineered as a direct replacement automatic transmission flexplate for classic Chevrolet and GMC driveline applications. It is listed for 1970-1976 Chevrolet Caprice and Impala, 1970-1975 Chevrolet Bel Air, 1975 Chevrolet C10, 1972-1975 Chevrolet El Camino, Malibu, Monte Carlo, and Corvette, plus 1973 Chevrolet Blazer, C10 Suburban, C20 Suburban, K20 Suburban, and GMC Jimmy. The 168-tooth layout, 14.125-inch outside diameter, and factory-style balance help maintain correct engagement and smooth operation in the transmission system. Part number 871003 is also a fitment match for 1970-1971 Chevrolet El Camino and Monte Carlo, exc. Police Car.

What This Flexplate Helps Address

• Cracked or fatigued flexplate material
• Vibration caused by an out-of-balance rotating assembly
• Starter engagement issues from worn or incorrect tooth count
• Converter alignment problems from incorrect dimensions
• Noise or driveline harshness related to flexplate wear

Installation Notes and Tips

Verify tooth count, outside diameter, and center diameter before installation to confirm the correct application. Check converter bolt pattern, starter engagement, and transmission compatibility during setup. Because this flexplate is SFI approved, it is a strong choice for builds that require a certified replacement in the listed Chevrolet and GMC applications. Fits 1970-1976 Chevrolet Caprice, 1970-1976 Chevrolet Impala, 1970-1975 Chevrolet Bel Air, 1975 Chevrolet C10, 1972-1975 Chevrolet El Camino, 1973-1975 Chevrolet Malibu, 1972-1975 Chevrolet Monte Carlo, 1970-1974 Chevrolet Corvette, 1973 Chevrolet Blazer, 1973 Chevrolet C10 Suburban, 1973 Chevrolet C20 Suburban, 1973 Chevrolet K20 Suburban, and 1973 GMC Jimmy.

Quality Assurance

Pioneer Cables builds this flexplate from high-grade steel and uses automated welding for consistent construction, then precision balances it to factory specifications. The included SFI certification sticker and 29.1 certification rating support use in applications that call for an SFI-approved flexplate.