F 350 4WD Super Duty V8-6.4L DSL Turbo (2008)
Remote Fluid Filter
Procedure for using a tank heated transmission fluid cooler line flusher
CAUTION: Whenever the transmission has been overhauled or a remanufactured transmission has been installed, the transmission fluid
cooler tubes and the radiator in-tank fluid cooler must be cleaned and backflushed to remove any contaminants or repeat transmission
failure will occur.
NOTE: Install a new oil-to-air (OTA) cooler as part of a transmission overhaul, or when installing a remanufactured transmission.
NOTE: Early build transmissions are equipped with a remote transmission fluid filter which is located under the transmission bell housing. When
carrying out an overhaul or installing a remanufactured transmission, a new remote filter assembly must be installed.
NOTE: Repeat repairs will occur if the transmission fluid flow does not meet specification. To avoid repeat repairs, carry out the fluid cooler flow
test. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General
Diagnostics/Transmission Fluid Cooler
NOTE: Plug the flusher into a 110-volt outlet and allow it to heat up to the correct temperature.
1. If equipped, remove and discard the in-line transmission fluid filter. Install a straight pipe with hose clamps in its place.
2. Remove the remote filter assembly and discard (early build vehicles).
3. Connect the rear and middle fluid cooler tube assemblies using hose and clamps (early build vehicles).
4. Flush the transmission cooler return tube first.
1. The transmission cooler return tube can be identified as the tube that runs from the OTA outlet to the rear of the transmission.
2. Using the appropriate fittings and quick disconnects supplied with the flusher, connect the flusher pressure and return lines to either end of the
transmission cooler return tube.
3. Switch the flusher pump on and allow it to run for 60 seconds.
4. Turn the switch off after 60 seconds and disconnect the pressure line.
5. Blow air through the cooler tube until the transmission fluid is drained back into the flusher.
