TH350 Trans. Pan Gasket

The TH350 Trans. Pan Gasket from Mr. Gasket is an essential replacement seal for any TH350 transmission rebuild or maintenance project. This gasket creates a leak-proof barrier between the transmission pan and the main transmission body, preventing fluid loss that compromises cooling, lubrication, and overall transmission longevity. Whether you're performing routine service, addressing a slow seep, or completing a full transmission overhaul, this gasket is a critical component that serious mechanics and transmission builders rely on.

Constructed from a cork and rubber composite material, the TH350 Trans. Pan Gasket delivers superior sealing performance across a wide operating temperature range. The cork layer provides conformability to mating surfaces while the rubber binder ensures flexibility and durability under thermal cycling and vibration—critical factors in an automatic transmission environment where fluid temperatures regularly exceed 200°F. Mr. Gasket's engineering ensures this gasket maintains its seal integrity across thousands of miles, resisting the corrosive effects of ATF (automatic transmission fluid) and preventing the silent transmission leaks that often go unnoticed until serious damage occurs.

This gasket is essential for anyone maintaining or rebuilding a TH350 transmission, whether in a classic muscle car, street rod, or performance truck. The TH350 remains one of the most popular automatic transmissions in the automotive enthusiast community due to its durability and ease of modification. Proper installation requires careful cleaning of both mating surfaces and even sealing pressure to activate the gasket's cork composition. Installers should use a quality RTV or gasket sealer sparingly and torque the pan bolts to factory specification in a crisscross pattern to ensure uniform pressure and reliable sealing performance.