Cast Alum Tranny Pans

The B and M AUTOMOTIVE Cast Aluminum Transmission Pan (Part No. 30280) is a deep-sump, finned transmission pan engineered to increase fluid capacity and improve cooling performance on TH350 automatic transmissions. This cast aluminum design adds 3.0 quarts of transmission fluid capacity, extending service intervals and reducing operating temperatures—critical advantages for street-driven vehicles, towing applications, and performance builds where thermal management directly impacts transmission reliability and longevity.

The finned construction maximizes surface area for heat dissipation while the deep sump design maintains proper fluid level during aggressive acceleration and cornering. The natural cast aluminum finish allows builders to integrate this pan into custom engine bay displays or modify it for specific mounting configurations. At 11.2 pounds, the substantial construction confirms the durability required for high-demand applications. For TH350 transmission owners, this capacity upgrade is the foundational cooling modification—addressing factory limitations without requiring internal transmission modifications or electronic intervention.

Builders seeking TH350 transmission pan upgrades typically prioritize this model when upgrading street cars, muscle cars, and trucks used for towing or sustained highway driving. The additional fluid volume acts as a heat sink, reducing peak transmission temperature by 20–30°F under load—a meaningful margin that extends clutch pack life and preserves shift quality. This transmission pan is sold as a complete kit, streamlining installation for those upgrading from the factory shallow pan or replacing a damaged original.