ATP Z-156 Automatic Transmission Flexplate 142-Tooth Steel Flex Plate

The ATP Z-156 is a replacement automatic transmission flexplate engineered to restore the proper connection between the engine and transmission. ATP (Automatic Transmission Parts Inc.) manufactures this steel flexplate to match original equipment dimensions, balance specifications, and ring gear tooth count.

Key Features:

• 142-tooth ring gear with 12-pitch for precise starter engagement
• 11.875-inch outside diameter matches OEM dimensions exactly
• High-grade steel construction for superior strength and long-term durability
• Precision balanced to factory specs — supports internally balanced engines including 4-cylinder and V6 configurations
• Automated welding process ensures strong, consistent ring gear bonding
• Correct bolt hole spacing and mounting hole diameter (8.5 in.) for proper torque converter attachment
• Matches OE base plate thickness for seamless fitment

About Flexplates: In automatic transmission vehicles, the flexplate serves as the critical link between the engine crankshaft and the torque converter. It also provides the ring gear teeth that engage the starter motor. Over time, the constant flex and heat cycling can cause cracks or ring gear damage — a broken flexplate cannot be repaired and must be replaced.

Installation Note: Install the flexplate onto the crankshaft and tighten bolts in a star pattern sequence using a hand torque wrench, torquing to the vehicle manufacturer's specifications.

OEM & Cross-Reference Part Numbers: GM 14018713, GM 14100554, Dorman 4307, Sealed Power 4161041, Pioneer FRA-138, NAPA 6005043, Anchor FA77, Bryco 33611, Autocraft G136, PTC FY61