Expedition 2WD V8-281 4.6L SOHC (1998)
Fluid Pump: Description and Operation
Part 2 Of 2
The transmission uses a gerotor design front pump support and gear. The pump provides the volume of fluid needed to charge the torque converter,
main control assembly, cooling system and lube system. Pump pressure is regulated by the main regulator valve. The pump is more efficient at lower
engine speeds. The pump has an internal boost circuit.