Pioneer Cables FRA-312 Automatic Transmission Flexplate

Pioneer Cables FRA-312 Flexplate Overview

The Pioneer Cables FRA-312 automatic transmission flexplate is a direct replacement for select GM compact car applications. Built to original dimensions from high-grade steel, it is engineered to restore factory-style driveline performance and proper starter engagement.

With 153 teeth, a 12.938-inch outside diameter, and a 10.25-inch mounting hole diameter, this flexplate matches the dimensional requirements used in specific Chevrolet Monza, Oldsmobile Starfire, Pontiac Sunbird, and Pontiac Phoenix applications. The FRA-312 is precision balanced to factory specifications for consistent operation.

Key Features

• Automatic transmission flexplate for select rear-wheel-drive applications
• 153-tooth ring gear for starter engagement
• 12.938-inch outside diameter
• Built from high-grade steel for strength and durability
• Automated welding process for consistent construction
• Precision balanced to factory specs
• Pitch flywheels: 12 to 14

Detailed Product Description

Pioneer Cables FRA-312 is an OE-style replacement flexplate made to the original dimensions of the factory part. It is intended for automatic transmission use and is built to help maintain proper crankshaft-to-transmission connection, starter ring gear alignment, and smooth rotational balance. This part cross-references DENSO Auto Parts 4091 for the same application.

Compatible With 1978-1979 Chevrolet Monza, N/A; 1978-1979 Oldsmobile Starfire, N/A; 1977-1979 Pontiac Sunbird, N/A; and 1977-1978 Pontiac Phoenix, N/A. The FRA-312 part number is also commonly searched alongside GM153 and FW96884 interchange references.

What This Flexplate Helps Address

• Cracked or warped flexplate surfaces
• Starter ring gear engagement problems
• Vibration caused by an out-of-balance flexplate
• Noise from damaged or worn flexplate teeth
• Driveline issues related to incorrect flexplate dimensions

Installation Notes and Tips

Verify tooth count, outside diameter, and mounting dimensions before installation. Confirm that the application uses a 153-tooth flexplate with a 12.938-inch outside diameter and 12-to-14 pitch flywheel specification. Inspect the starter, torque converter, and related fasteners for wear or damage before reassembly. The FRA-312 should be installed according to the vehicle service manual and torqued to the manufacturer’s specifications.

Quality Assurance

Pioneer Cables manufactures this flexplate using automated welding and factory-spec balancing to support consistent fit and rotational accuracy. The part is built as a replacement for OEM-style service in the listed Chevrolet, Oldsmobile, and Pontiac applications.