Perm-Align Trans. Gasket - Ford E40D/4R100

The Perm-Align Transmission Gasket for Ford E40D/4R100 is designed for mechanics and restoration enthusiasts who require dependable sealing in heavy-duty transmission applications. This gasket is crucial for maintaining proper transmission fluid pressure and preventing leaks, particularly in Ford's E40D four-speed and 4R100 five-speed transmissions.

MOROSO's Perm-Align design features a precision-molded elastomer core bonded to steel shims, ensuring dimensional stability under thermal cycling and pressure. This construction is superior to traditional cork or paper gaskets, as it resists oil breakdown and heat while remaining flexible enough to accommodate minor warping in cast iron transmission housings.

Ideal for those rebuilding high-mileage trucks or restoring classic Ford vehicles, this gasket fits a range of models including Ford F-Series trucks, Broncos, and Econolines equipped with E40D or 4R100 transmissions from the 1989–2003 era. Its design helps prevent costly fluid leaks that can compromise transmission performance.