Black Trans Pan GM TH400 Deep Pan

The DERALE Black Transmission Pan for TH400 is a deep-sump replacement designed for serious transmission builders, street rod enthusiasts, and high-performance mechanics who demand superior fluid capacity and cooling. The TH400 is legendary for durability, but factory pan capacity often limits heat dissipation during extended driving, spirited shifts, or towing applications. This deep pan addresses that limitation by increasing the transmission fluid volume, allowing cooler operating temperatures and extended service intervals—critical for maximizing transmission longevity and reliability in modified vehicles.

Engineered from durable steel with a black powder-coat finish, the DERALE deep pan maintains factory bolt-hole alignment while significantly increasing sump depth compared to OEM designs. The deeper geometry traps more fluid, improving thermal mass and allowing the transmission cooler to regulate temperatures more effectively under load. The pan's construction preserves magnetic drain plug functionality, making routine fluid and filter changes straightforward. At 10.75 lbs and measuring 14.7 x 6.6 x 19 inches, the pan fits within typical engine bay clearances while providing measurable fluid capacity gains that translate directly to reduced oxidation and varnish formation in the fluid.

This pan suits anyone building or maintaining a TH400 transmission, from restomod builders perfecting a classic hot rod to daily-driven truck owners upgrading cooling capacity. The bolt-on installation requires only pan removal and gasket replacement—no fabrication or modification needed. Compatibility is straightforward for any vehicle using a TH400 transmission, including Chevrolet trucks, performance cars, and transfer cases. Pair this with an external transmission cooler for optimal results, particularly in climates with sustained high ambient temperatures or during heavy-duty towing. This investment protects your transmission investment and delivers measurable improvements in shift feel and fluid condition over time.