Fabricated Alum. Trans. Pan - GM TH350

The Fabricated Aluminum Transmission Pan for GM TH350 from STEFS PERFORMANCE PRODUCTS (part number 4003) is a direct-replacement transmission pan engineered for reliable performance in marine engine installations. Built from fabricated aluminum, this transmission pan combines lightweight construction with corrosion resistance—a critical advantage in saltwater and freshwater environments where steel pans deteriorate rapidly. The flat design accommodates standard TH350 transmission geometry while the 3-inch depth provides adequate fluid capacity for marine duty cycles.

Key specifications deliver practical advantages for boat owners and marine technicians. The integrated magnetic drain plug captures ferrous debris before it circulates through transmission fluid, extending fluid life and protecting internal components from particulate wear. At 6.05 pounds, the aluminum construction reduces overall weight compared to cast iron equivalents—beneficial in applications where fuel efficiency and load balance matter. The natural aluminum finish resists oxidation better than bare steel when properly maintained, though regular inspection remains essential in harsh marine environments.

This pan is purpose-built for boaters running GM TH350 transmissions in inboard, outboard, or jet-drive applications. Whether you're rebuilding a transmission after years of service, replacing a corroded factory pan, or upgrading to aftermarket components, this aluminum pan addresses both performance and longevity. The magnetic drain plug proves especially valuable during routine fluid maintenance, allowing operators to monitor wear patterns that signal transmission health before costly damage occurs. Precision fabrication ensures proper fitment and leak-free sealing with OEM gaskets.