Powerglide Pan Gasket

The COAN Powerglide Pan Gasket (COA-12151) is a precision-engineered transmission seal designed for builders and mechanics restoring or modifying Powerglide automatic transmissions. This gasket sits between the transmission pan and the main housing, serving as the critical barrier that prevents fluid leakage while allowing pan removal for service and maintenance. Whether you're performing a fluid and filter change, inspecting internal components, or rebuilding a Powerglide for street or competition use, a quality pan gasket ensures a reliable, leak-free seal that withstands thermal cycling and pressure variations inherent in high-performance driving.

This Powerglide Pan Gasket features a 0.060-inch thick non-stick composite construction with Perm-Align technology, which means the gasket material resists sticking to metal surfaces during assembly and disassembly. The non-stick composite formulation is engineered to maintain its seal integrity across repeated pan removal cycles—critical for transmission builders who service vehicles regularly. The Perm-Align design allows for easier pan reinstallation without the gasket material tearing or adhering to the pan flange, reducing installation time and the risk of surface damage that could compromise future seals. Composite gasket materials offer superior chemical resistance to modern synthetic transmission fluids compared to traditional cork or paper alternatives.

Powerglide owners benefit most from this gasket during routine maintenance, rebuilds, and performance upgrades where transmission access is necessary. The compact 11 x 13.55-inch dimensions are engineered specifically for Powerglide two-speed automatic transmissions, ensuring proper fitment without modification. Installation is straightforward: clean the transmission pan and case surfaces thoroughly with a lint-free cloth, position the gasket on the pan mounting surface, and torque the pan bolts to manufacturer specification in a star pattern. This single gasket (sold individually) is a consumable item—purchase a replacement whenever removing and reinstalling your transmission pan to guarantee a fresh, leak-free seal and avoid fluid seepage during operation.