ATP Parts Z-126 Automatic Transmission Flexplate

ATP Parts Z-126 Flexplate Overview

ATP Parts Z-126 is an automatic transmission flexplate for Ford and Mercury applications that use a 157-tooth ring gear and a 13.313-inch outside diameter. It connects the engine to the torque converter and provides the starter ring gear engagement needed for reliable cranking.

Built from high-quality steel with the correct bolt-hole spacing and ring gear tooth count, this flexplate is a direct replacement for worn or cracked OE-style units. It is a practical choice for classic Ford Mustang, Mercury Cougar, Mercury Montego, Mercury Monarch, and Ford LTD automatic transmission service.

Key Features

• Part number Z-126
• Automatic transmission flexplate for engine-to-transmission connection
• 157 teeth for starter engagement
• 13.313-inch outside diameter
• 10.5 mm mounting hole diameter
• Includes added weight, 28 oz
• Pitch flywheels: 12 to 14
• High-quality steel construction
• OE-style bolt-hole spacing and ring gear tooth layout

Detailed Product Description

The ATP Parts Z-126 flexplate is engineered for automatic transmission systems where the flexplate transfers rotational movement between the engine and torque converter while also providing starter ring gear teeth. Over time, repeated expansion and contraction can lead to cracks, shearing, or other damage, and a damaged flexplate must be replaced rather than repaired. This unit follows the original-style dimensions and tooth count to support proper fitment in applications such as the Ford Mustang, Mercury Cougar, Mercury Montego, Mercury Monarch, and Ford LTD.

This part cross-references Pioneer Automotive Industries FRA-203 and Standard Ignition V608 for the same application.

What This Flexplate Helps Address

• Cracked or fractured flexplate material
• Starter engagement problems caused by worn ring gear teeth
• Noise from a damaged or distorted flexplate
• Torque converter connection issues related to flexplate wear
• Replacement needs after inspection reveals shearing or fatigue

Installation Notes and Fitment

Fits 1975-1976 Mercury Monarch, N/A. Fits 1974 Mercury Montego, N/A, exc. Special Eng.; Only Fits FMX. Fits 1968-1972 Mercury Montego, N/A, exc. Special Eng.; Only Fits FMX. Fits 1974 Mercury Montego, N/A, exc. Special Eng.; Only Fits C4. Fits 1968-1972 Mercury Montego, N/A, exc. Special Eng.; Only Fits C4. Fits 1968-1974 Mercury Montego, N/A, exc. Special Eng. Fits 1965-1973 Ford Mustang, N/A. Fits 1968-1972 Ford LTD, N/A. Fits 1968-1970 Mercury Cougar, N/A, exc. Special Eng.; Only Fits FMX. Fits 1968-1970 Mercury Cougar, N/A, exc. Special Eng.; Only Fits C4. Fits 1968 Mercury Cougar, N/A, exc. Special Eng. Fits 1967-1968 Mercury Cougar, N/A. Fits 1967 Ford LTD, N/A, exc. Special Eng. Fits 1964 Ford Mustang, N/A, exc. Special Eng.

Verify transmission type, tooth count, outside diameter, and mounting dimensions before installation. Confirm the application-specific notes for FMX or C4 coverage where listed, since fitment varies by engine and transmission configuration. Inspect the torque converter and starter components during replacement to avoid repeat damage.

Quality Assurance

ATP Parts manufactures this flexplate from steel with OE-style dimensions, correct bolt-hole spacing, and the specified 157-tooth ring gear layout for consistent service life in supported applications.