Low Volume Pump Assembly, Aluminum Body & Cover w/ Wear Plate

LOW VOLUME PUMP ASSEMBLY

• Hard coated aluminum pump body
• Aluminum cover w/ wear plate
• Heat treated bolt-in stator
• Coated gears

The Coan Racing COA‑22821‑AL Low‑Volume Pump Assembly is a precision-engineered upgrade for the Turbo Hydramatic 400 transmission, crafted to optimize hydraulic efficiency in high-performance and race applications. Built in the USA, the pump body is machined from high-grade aluminum and hard-coated to resist wear, while the aluminum cover includes a wear plate to resist erosion from high-flow fluid circulation. Internally, hardened gears and a heat-treated bolt-in stator deliver smooth, reliable fluid movement, and the sealed, coated gears help ensure consistent fluid pressure under strenuous conditions.

Because the pump is low-volume by design, it frees up horsepower and reduces parasitic drag without sacrificing pressure, making it ideal for drag cars, bracket racers, or street builds aiming to reduce internal turbulence and maximize drivetrain response. Coan’s attention to detail in material selection and precision machining ensures that the COA‑22821‑AL drops into stock TH400 cases without modification, making it a seamless upgrade for experienced builders and engine performance enthusiasts alike.