Drive Flange Steel Ford 340/340

The Drive Flange Steel Ford 340/340 from Bert Transmissions is a precision crankshaft coupler engineered for serious small-block Ford builds. This 10-spline steel coupling sits between your engine's crankshaft and transmission input shaft, serving as the critical mechanical bridge that transfers rotational force while accommodating minor misalignment. Whether you're assembling a street engine, competition drag car, or high-performance street rod, this drive flange is essential for reliable power delivery and transmission longevity.

Manufactured in steel with a 10-spline design, the Drive Flange Steel Ford 340/340 provides the strength needed to handle elevated torque loads without flex or wear. The dual "340" designation references compatibility with both 340-cubic-inch and 340-horsepower small-block Ford applications, making it a versatile choice for vintage muscle car restorations and modern performance builds alike. At just 2.23 lbs with compact dimensions (4.2 x 1.55 x 4.95 inches), this coupler integrates seamlessly into tight engine bays while maintaining the rigidity required for consistent engagement and power transfer across a wide RPM range.

Mechanics and engine builders rely on Bert Transmissions couplers for daily-driver reliability and track-proven durability. Installation requires proper alignment with your specific transmission bell housing and crankshaft flange configuration—verify compatibility with your transmission type before purchase. This component is ideal for custom engine swaps, restoration projects, and performance upgrades where OEM components may be worn or unavailable, ensuring your small-block Ford's power reaches the wheels efficiently.