ATP Parts Z-111 Automatic Transmission Flexplate

ATP Parts Z-111 Flexplate for GM Applications

ATP Parts Z-111 is an automatic transmission flexplate for internally balanced engines with a 2-piece crank seal. It uses 168 teeth, a 14.125-inch outside diameter, and an 11.25-inch torque converter mounting hole spread for OE-style fitment on select Chevrolet and GMC vehicles.

Key Features

• Automatic transmission flexplate for internally balanced engine applications
• 168-tooth ring gear for starter engagement
• 14.125-inch outside diameter and 2.49-inch inside diameter
• 11.25-inch torque converter mounting hole spread
• High-quality steel construction for durability
• Correct bolt-hole spacing and ring gear tooth profile to match original fitment
• For engines with a 2-piece crank seal

Product Details

The ATP Parts Z-111 flexplate connects the engine and torque converter in automatic transmission systems. In normal operation, the flexplate flexes as engine speed changes, helping manage torque converter expansion and contraction. Over time, repeated stress can lead to cracking or shearing, and a damaged flexplate must be replaced rather than repaired. This part cross-references Pioneer Automotive Industries FRA-100 for the same application. The Z-111 is a direct-fit replacement for select Chevrolet Camaro, Corvette, Caprice, Impala, El Camino, Malibu, Monte Carlo, C10, C20, C30, K10, K20, K30, P30, Astro, and GMC truck and van applications listed in the fitment data.

Common Problems This Part Can Address

• Cracked or sheared flexplate
• Starter engagement issues caused by worn ring gear teeth
• Torque converter mounting problems from incorrect bolt-hole spacing
• Noise or vibration from a damaged transmission flexplate
• Engine-to-transmission connection failure in automatic transmission systems

Installation Notes and Tips

Verify engine balance, crank seal style, tooth count, and torque converter bolt pattern before installation. This flexplate is specified for internally balanced engines with a 2-piece crank seal and 168 teeth. Confirm the 11.25-inch torque converter mounting hole spread and 5/16-inch bolt hole size against the original part. For fitment examples, it is listed for 1980-1985 Chevrolet C10, 1980-1985 GMC C2500, and 1981-1985 GMC K1500, along with additional Chevrolet and GMC applications in the fitment table.

Quality Assurance

ATP Parts manufactures this flexplate from high-quality steel with OE-style dimensions and tooth spacing to support long service life and consistent fitment. Part number Z-111 is built to match the original application requirements for select GM vehicles.