ATP Parts ZA-572 Clutch Flywheel Ring Gear

Clutch Flywheel Ring Gear for Ford and Mercury

ATP Parts ZA-572 is a clutch flywheel ring gear built for starter engagement on select Ford truck and Thunderbird applications. It is specified with 146 teeth, a 14.774-inch outside diameter, and a 13.352-inch inside diameter for direct replacement use where the original ring gear teeth are worn or broken.

Compatible With 1953-1964 Ford F-100, F-250, and F-350 applications, plus 1955-1958 Ford Thunderbird and 1961-1962 Mercury Colony Park models. ATP Parts ZA-572 is made to match original fit and function for the listed vehicles.

Key Features

• Part number ZA-572 clutch flywheel ring gear
• 146-tooth design for starter motor engagement
• 14.774-inch outside diameter and 13.352-inch inside diameter
• 0.365-inch thickness
• Ring gear chamfer: none
• Pitch flywheels: 10
• OE-style replacement for listed Ford and Mercury applications

Detailed Description

The ring gear is the starter interface on the flywheel, and worn teeth can prevent the engine from cranking normally. ATP Parts ZA-572 is engineered to replace the original ring gear on the listed Ford F-100, F-250, F-350, Thunderbird, and Mercury Colony Park applications. The 146-tooth count and published diameter specifications help ensure proper starter mesh and reliable engagement when the original part has damaged teeth.

This part cross-references Pioneer Automotive Industries FRG-146NC for the same application.

What It Helps Fix

• Starter motor grinding during engine cranking
• No-crank condition caused by damaged ring gear teeth
• Intermittent starter engagement on worn flywheels
• Hard starting related to broken or missing teeth
• Noise at the starter-to-flywheel interface

Installation Notes and Tips

Verify tooth count, outside diameter, inside diameter, and flywheel pitch before installation. Inspect the starter drive and flywheel surface at the same time, since worn starter components can damage a new ring gear. Confirm the vehicle application against the listed fitment for 1953-1956 and 1960-1964 Ford F-100, F-250, and F-350, 1955-1958 Ford Thunderbird, and 1961-1962 Mercury Colony Park.

Quality Assurance

ATP Parts designs this ring gear to fit and function like the original part for the specified applications, supporting durability and long service life when installed on the correct flywheel.