Crown Victoria V8-4.6L Flex Fuel (2008)
Fluid - A/T: Service and Repair
Transmission Fluid Cooler Tubes - Backflushing and Cleaning
Transmission Fluid Cooler Tubes - Backflushing and Cleaning
1. WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in Fire
Suppression System. Failure to follow the instructions may result in serious personal injury.
With the vehicle in NEUTRAL, position it on a hoist.
2. CAUTION: When internal wear/damage occurs in the transmission, metal particles, clutch plate material and band material can travel
into the torque converter, the fluid cooler tubes and the oil-to-air (OTA) fluid cooler. These contaminates are a major cause of recurring
transmission concerns. To prevent future concerns, remove these contaminants from the cooling system before placing the transmission
back into use.
CAUTION: The oil-to-air (OTA) fluid cooler is not repairable with existing equipment due to the thermostatic bypass valve. Do not
attempt to backflush and clean the OTA fluid cooler. Install a new OTA fluid cooler if there is leakage from the OTA fluid cooler, major
metallic failure, multiple clutch or clutch plate failure, or sufficient component wear that result in metallic contamination.
Using a suitable torque converter/fluid cooler cleaner, clean the fluid cooler tubes.
3. Test your equipment to make sure that a vigorous fluid flow is present before proceeding. Install a new filter in the flush equipment if the flow is
weak or contaminated.
4. To aid in attaching the cleaner to the transmission steel cooler tubes, connect 2 additional rubber hoses to the transmission end of the steel
transmission cooler tubes as follows:
^
Disconnect the fluid cooler tubes from the oil-to-air (OTA) cooler.
^
Install a rubber hose in place of the OTA cooler.
^
Connect the cleaner tank pressure line to the steel transmission cooler return tube (the longest tube).
^
Connect a tank return hose to the steel transmission cooler pressure tube (shorter tube). Place the outlet end of this hose in the fluid tank
reservoir.
5. Turn on the pump and allow the fluid to circulate a minimum of 5 minutes (cycling switch ON and OFF will help dislodge contaminants in the
cooler system).
6. Switch OFF the pump and disconnect the pressure hose from the transmission cooler return tube.
7. Use compressed air to blow out the cooler(s) and tubes (blow air into the transmission cooler return tube) until all fluid is removed.
8. Remove the rubber return hose from the remaining steel cooler tube.
9. Connect the OTA cooler tubes.
10. CAUTION: Contamination can become trapped in the coolers. Clean fluid flow after flushing does not always indicate all contamination
has been removed.
Install a new OTA.
11. WARNING: If the vehicle is equipped with a fire suppression system, repower the system. For important safety warnings and
procedures, refer to Fire Suppression System. Failure to follow these instructions may result in serious personal injury.
If equipped with fire suppression system, repower the system.
