ATP Parts Z-271 Automatic Transmission Flexplate

Automatic Transmission Flexplate for GM 4.8L/5.3L Applications

ATP Parts Z-271 is an automatic transmission flexplate built for GM truck, van, and classic body applications that use a 168-tooth ring gear and a 12-to-14 pitch flywheel pattern. It connects the engine to the torque converter and provides the starter ring gear engagement needed for reliable cranking.

For Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Express, and GMC Savana applications, this flexplate is made from high-quality steel with the correct bolt-hole spacing and ring gear tooth count to match the original part. ATP Parts Z-271 is a direct replacement choice when the original flexplate is cracked, warped, or showing signs of fatigue.

Key Features

• Automatic transmission flexplate for GM rear-wheel-drive applications
• 168 teeth for starter engagement
• 14.125 in. outside diameter
• 11.0 in. torque converter mounting hole spread
• 12-to-14 pitch flywheel pattern
• Weight added: yes
• High-quality steel construction for durability
• Direct replacement geometry to match original fitment

Detailed Description

The flexplate is a critical link between the engine and automatic transmission. It transfers rotational movement to the torque converter while also carrying the starter ring gear. Over time, repeated expansion and contraction can lead to cracks or shearing, and a damaged flexplate should be replaced rather than repaired. ATP Parts Z-271 is engineered with the correct dimensions and tooth count to support proper alignment and dependable operation in the listed Chevrolet and GMC applications. This part cross-references Pioneer Automotive Industries FRA-472 for the same application.

What It Helps Fix

• Cracked or fractured flexplate surfaces
• Starter engagement problems caused by worn ring gear teeth
• Torque converter mounting issues from incorrect bolt spacing
• Engine-to-transmission vibration related to flexplate damage
• No-start conditions tied to flexplate or ring gear failure

Installation Notes and Tips

Verify the 168-tooth count, 14.125-inch outside diameter, and 11.0-inch torque converter mounting hole spread before installation. Confirm the vehicle uses a 12-to-14 pitch flywheel pattern and compare the removed part to ATP Parts Z-271 for match-up. Inspect the starter, torque converter, and mounting surfaces during replacement to help prevent repeat failure.

Quality Assurance

ATP Parts Z-271 is manufactured from steel and built to match original bolt-hole spacing and ring gear tooth geometry for the listed applications. The part is not SFI approved and does not include an SFI certification sticker.