Econoline E150 1/2 Ton V8-5.4L SOHC VIN L (1999)
Transmission Cooler: Description and Operation
4R100
E40d Transmission
All vehicles with automatic transmission are equipped with a transmission fluid cooler that is integral to the radiator assembly and cannot be repaired
separately. In addition, an auxiliary oil-to-air transmission fluid cooler is mounted in front of the radiator. In operation. transmission fluid travels from
the transmission to the integral fluid cooler to the auxiliary transmission fluid cooler and back to the transmission. The integral transmission fluid
cooler transfers heat from the transmission fluid to the engine coolant. The auxiliary transmission fluid cooler transfers heat from the transmission
fluid to the outside air.
