F 150 4WD Pickup V8-5.4L CNG VIN M (2001)
Transmission Cooler: Service and Repair
4R100
Cooler Bypass Valve-4R100 Transmission
Removal
1. WARNING: The electrical power to the air suspension system must be shut off prior to hoisting, jacking or towing an air suspension
vehicle. This can be accomplished by turning off the air suspension switch in the RH kick panel area. Failure to do so may result in
unexpected inflation or deflation of the air springs which may result in shifting of the vehicle during these operations.
Raise and support the vehicle.
2. CAUTION: Install a new inline transmission fluid filter (XC3Z-7B155-BA) every 48,000 km (30,000 miles) and always as part of a transmission
overhaul or exchange. If the vehicle was not equipped with an inline fluid filter, install a new inline transmission fluid filter kit (XC3Z-7B155-AA)
according to the instructions supplied with the kit as part of a transmission overhaul or exchange.
NOTE: The inline transmission fluid filter, if so equipped, is attached to the fluid cooler return tube. The fluid cooler return tube runs from the
tank transmission fluid cooler or the auxiliary transmission fluid cooler, if so equipped, to the rear transmission cooler tube case fitting.
Remove, and discard the inline transmission fluid filter, if so equipped.
3. If not done previously, carry out the transmission fluid cooler flow test procedure.
4. Remove the fluid cooler tube from the front cooler line case fitting.
5. Remove the fluid cooler tube from the rear cooler line case fitting.
