Pioneer Cables FRA-311 Automatic Transmission Flexplate

Pioneer Cables FRA-311 Flexplate Overview

The Pioneer Cables FRA-311 is an automatic transmission flexplate built to restore OEM-level performance in supported applications. It is made from high-grade steel, formed to original dimensions, welded with an automated process for consistent strength, and precision balanced to factory specifications.

Compatible With 1978-1980 Chevrolet Monza, 1979-1980 Oldsmobile Starfire, and 1979-1980 Pontiac Sunbird applications that use a 153-tooth flexplate and a 12.938-inch outside diameter.

Key Features

• Part number: FRA-311
• Automatic transmission flexplate for OE-style replacement
• High-grade steel construction
• Original dimensions for proper fitment
• Automated welding for consistent joint strength
• Precision balanced to factory specifications
• 153 teeth with 12.938-inch outside diameter
• Inside diameter: 2.50 inches
• Mounting hole diameter: 10.0 mm
• Pitch flywheels: 12 to 14

Detailed Description

Pioneer Cables FRA-311 is an automatic transmission flexplate engineered for vehicles that require a 153-tooth, 12.938-inch flexplate profile. It is built to original dimensions and balanced to factory specs, which helps maintain proper starter engagement and rotational consistency in supported Chevrolet Monza, Oldsmobile Starfire, and Pontiac Sunbird applications. This part cross-references Monroe Shocks & Struts (e.g., 4092, 4161059) for the same application.

Use FRA-311 when replacing a worn, cracked, or out-of-spec flexplate in 1978 Chevrolet Monza with cross flow heads, 1979-1980 Chevrolet Monza, 1978 Oldsmobile Starfire without weight, 1979-1980 Oldsmobile Starfire, and 1979-1980 Pontiac Sunbird. The part number FRA-311 is also referenced by interchange numbers commonly associated with this application family.

What This Flexplate Helps Address

• Cracked or fatigued flexplate material
• Starter ring gear engagement issues from worn teeth
• Vibration caused by an out-of-balance flexplate
• Noise from damaged or distorted flexplate surfaces
• Fitment problems from incorrect diameter or tooth count

Installation Notes and Tips

Verify tooth count, outside diameter, mounting hole diameter, and pitch before installation. Confirm the application uses a 153-tooth flexplate and matches the listed vehicle notes, including 1978 Chevrolet Monza with cross flow heads and 1978 Oldsmobile Starfire without weight. Inspect the starter, crankshaft flange, and transmission interface for wear before installing FRA-311. Proper torque procedures and final runout checks are recommended after installation.

Quality Assurance

Pioneer Cables manufactures this flexplate from high-grade steel and balances it to factory specifications for consistent replacement quality. The automated welding process is used to improve strength and repeatability across production.