ATP Parts Z-118 Automatic Transmission Flexplate

Automatic Transmission Flexplate Overview

ATP Parts Z-118 is an automatic transmission flexplate for select Buick and Pontiac applications. It connects the engine and transmission, providing the starter ring gear engagement and torque converter mounting surface needed for proper operation.

Key Features

• High-strength steel construction for durability under repeated load cycles.
• 160-tooth ring gear for starter engagement.
• 13.438-inch outside diameter with 12-to-14 pitch flywheel spacing.
• Correct bolt hole spacing and ring gear tooth pattern to match the original part.
• Weight-added design for applications that require it.

Detailed Fitment and Function

This automatic transmission flexplate is built for vehicles with automatic transmissions where the flexplate transfers rotational movement between the engine and torque converter. Fits 1977-1980 Buick Electra, N/A; Fits 1972-1980 Buick LeSabre, N/A; Fits 1964-1965 Buick LeSabre, N/A; Fits 1980 Pontiac Bonneville, N/A; Fits 1978 Pontiac Bonneville, N/A; Fits 1980 Pontiac Catalina, N/A; Fits 1978 Pontiac Catalina, N/A; Fits 1980 Pontiac Laurentian, N/A; Fits 1978-1979 Buick Estate Wagon, N/A; Fits 1979 Pontiac Bonneville, N/A; Fits 1979 Pontiac Catalina, N/A; Fits 1977-1978 Buick Riviera, N/A; Fits 1973-1977 Buick Century, N/A; Fits 1975-1976 Buick Regal, N/A; Fits 1975-1976 Buick Skylark, N/A; Fits 1964-1967 Buick Skylark, N/A; Fits 1976 Pontiac Ventura, N/A; Fits 1975 Buick Apollo, N/A; Fits 1970-1972 Buick GS, N/A; Fits 1964-1972 Buick Sportwagon, N/A; Fits 1966-1971 Buick LeSabre, N/A; Fits 1971 Buick Skylark, N/A; Fits 1968-1969 Buick GS 350, N/A; Fits 1964-1969 Buick Special, N/A; Fits 1967 Buick Gran Sport, N/A. On Buick and Pontiac platforms, a worn flexplate can crack, shear, or create expensive drivetrain damage if left in service.

Common Problems This Part Addresses

• Cracked or broken flexplate material.
• Starter ring gear wear or damaged teeth.
• Torque converter mounting issues caused by incorrect hole spacing.
• Noise or vibration from a fatigued flexplate.
• Drivetrain damage from continued use of a failed flexplate.

Installation Notes and Quality

Verify tooth count, outside diameter, and bolt pattern before installation. This part cross-references Pioneer Automotive Industries (e.g., FRA-101) and Febi-Bilstein (e.g., 33608) for the same application. ATP Parts builds this flexplate from high-quality steel with original-style dimensions and tooth spacing for long service life and durability.