153 Tooth Chevy Flywheel

The TCI 153 Tooth Chevy Flexplate is a purpose-built internal balance flexplate engineered for small block Chevrolet engines paired with automatic transmissions. This steel flexplate delivers the precise tooth count and balance characteristics required for reliable power delivery in both street and performance applications, meeting SFI 29.1 safety specifications for flex drive systems.

Rated at 153 teeth, this flexplate is designed for specific automatic transmission compatibility and provides internal balance matching, meaning it works seamlessly with internally balanced small block Chevy crankshafts. The two-piece seal design accommodates modern rear main seal configurations, simplifying installation and reducing potential leak points. At 5.7 lbs, the flexplate maintains the rotational characteristics essential for smooth torque converter engagement without adding unnecessary rotating mass that could compromise throttle response or shift quality.

This flexplate is engineered for builders restoring classic small block Chevrolet engines or upgrading existing automatic transmission platforms. Whether supporting a stock 350 build or a modified 383, the 153-tooth design integrates with the appropriate torque converter and transmission pairing. TCI's manufacturing standards ensure concentricity and tooth integrity, critical factors that prevent vibration, converter shudder, and premature wear on drivetrain components during acceleration and sustained power delivery.

SFI 29.1 certification verifies this flexplate meets automotive safety standards for flex drive plate assembly, protecting both engine and transmission during high-load scenarios. Proper fitment requires matching the 153-tooth specification to your transmission's converter bolt pattern and your engine's internal or external balance configuration—critical details that determine driveline stability and longevity.