BBC Premium Flexplate 153 Tooth Int. Balance

The TCI BBC Premium Flexplate 153 Tooth Int. Balance is a precision-engineered flexplate designed for Big Block Chevy engines paired with automatic transmissions. Built for serious engine builders and mechanics who demand reliability in high-performance applications, this internal balance flexplate bridges the crankshaft and torque converter with OEM-grade durability. Whether you're rebuilding a street engine, restoring a classic, or upgrading an existing drivetrain, selecting the correct flexplate specification—particularly tooth count and balance type—is critical to smooth operation and longevity.

This premium flexplate features 153 teeth and internal balance design, meaning the balance weight is integrated into the flexplate itself rather than requiring external balancing hardware. The steel construction provides superior strength and heat resistance compared to cast alternatives, essential when handling the torque loads of a Big Block Chevy engine. The 153-tooth count is the standard specification for BBC engines with most modern and vintage automatic transmissions, ensuring proper torque converter engagement and eliminating timing and clearance issues. At 5.1 lbs, the weight is optimized for balanced rotating assembly dynamics, and the internal balance eliminates the need for external counterweights that can complicate installation.

This flexplate is ideal for engine rebuilds, transmission swaps, and high-performance Big Block Chevy conversions where OEM or equivalent quality is non-negotiable. Mechanics and engine builders rely on TCI's internally balanced designs to match balanced crankshafts and harmonic balancers, reducing vibration and extending component life. The BBC Premium Flexplate works seamlessly with standard BBC bell housing dimensions and is compatible with automatic transmissions common to Big Block applications from the 1960s through modern builds. Proper installation requires attention to fastener torque specifications and alignment with the transmission input shaft.