Moroso Automatic Transmission Oil Pan
Moroso Automatic Transmission Oil Pans: Race-Proven Engineering for the Street and Strip
When your automatic transmission is working hard — whether launching off the line at the drag strip or navigating the heat of a road course — the stock stamped-steel pan simply wasn't designed to keep up. Moroso Performance Products has built its reputation on solving exactly this kind of problem, and their lineup of automatic transmission oil pans reflects decades of racing-derived innovation applied to one of the drivetrain's most overlooked components.
Fully Fabricated Aluminum Construction
Moroso has directed its engineering expertise toward the design and manufacturing of premium-quality transmission pans, fabricated entirely from lightweight aluminum and featuring a one-piece billet rail to ensure leak-free sealing. What sets these pans apart from cast or stamped alternatives is the next step in the process: precise CNC manufacturing and TIG welding prevent distortion for a perfect fit every time. The billet rail itself receives additional attention — the rail is CNC machined after welding for flatness and superior fitment. That extra machining step is the difference between a pan that seals perfectly on the first install and one that requires repeated gasket replacements.
Extended-Depth Design & Fluid Management
Pans with extended depths reduce temperature and improve oil control during acceleration and braking. This is critical in performance applications where hard acceleration shifts fluid away from the pickup and sustained high loads raise fluid temperatures to damaging levels. The aluminum deep pan holds up to two quarts more fluid than stock for high-performance use, and features anti-slosh baffles while weighing roughly half as much as a cast pan.
Dual Fittings & Magnetic Drain Plug Standard
All Moroso transmission pans include dual fittings — a magnetic drain plug and pan mounting hardware — as standard equipment. Specifically, each pan features dual fittings with a magnetic -8AN drain plug and a 1/4" NPT port, giving builders a dedicated port for a temperature sender, a cooler line, or a pressure gauge — no drilling required. The magnetic drain plug captures ferrous wear particles with every fluid change, giving you an early warning of internal transmission wear before it becomes catastrophic.
Wide Transmission Application Coverage
Moroso covers a broad range of popular automatic transmissions across GM, Ford, and Mopar platforms. Notable fitments include the GM TH400/3L80E with a fabricated aluminum deep pan and CNC-machined one-piece billet aluminum rail for leak-free performance, as well as the GM Powerglide deep pan with a 1-piece billet aluminum rail, a 1/4" NPT port with plug, and a magnetic -8AN drain plug. Ford enthusiasts are covered too, with options for the E40D/4R100, while the GM 4L80E pan features a fully fabricated aluminum one-piece billet rail with a 3-1/2" deep sump, a transmission oil filter spacer, a magnetic drain plug, and an oil level check port. The Chrysler TorqueFlight 727 is also represented in the lineup.
Built for Competitors, Trusted by Street Enthusiasts
Moroso Performance Products is one of the world's most respected suppliers of automotive equipment for racing and street performance applications, manufacturing over 4,000 products — and its customer list ranges from grassroots racers to top-level NASCAR and NHRA/IHRA race teams. That competition pedigree translates directly into every transmission pan they produce: the tolerances are tighter, the materials are better, and the hardware is more thoughtful than anything you'll find on a factory replacement shelf. For builders who demand that their automatic transmission perform as hard as the rest of the vehicle, Moroso's transmission oil pans are a foundational upgrade worth every dollar.