Crank Adapter Sleeve - GM LS to Early Trans.

The Crank Adapter Sleeve - GM LS to Early Trans. is a critical component for automotive enthusiasts performing engine swaps involving modern LS-series powerplants and older transmission platforms. When mating a General Motors LS engine to a legacy automatic transmission such as a TH350, TH400, or 700R4, the pilot hole in the crankshaft is typically too large for the older torque converter hub. This sleeve fills that gap, ensuring the converter is properly centered and supported to prevent vibration and premature wear during operation.

Constructed from durable steel with a natural finish, this Crank Adapter Sleeve - GM LS to Early Trans. provides the structural integrity required to withstand high-RPM rotational forces. The precision-machined dimensions allow for a reliable press-fit into the LS crank flange, effectively extending the pilot surface to meet the specifications of early GM torque converters. By maintaining concentricity between the engine and transmission, the adapter protects the pump seal and input shaft from misalignment issues that lead to failure.

Engineered by PRW INDUSTRIES, INC., the Crank Adapter Sleeve - GM LS to Early Trans. is essential for anyone looking to buy an affordable solution for LS swap projects without purchasing a custom torque converter. This adapter is compatible with standard LS1, LS2, LS3, LS6, and 6.0L iron block engines when paired with non-LS style automatic transmissions. Proper installation ensures a secure connection, making it a vital part of any performance-oriented drivetrain upgrade or restoration. Review the specifications to confirm compatibility with your specific flywheel and converter setup before purchase.