F 150 Heritage 4WD Pickup V8-5.4L SOHC VIN Z Bi-fuel (2004)
7. Inspect the transmission fluid cooler fitting threads for damage.
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If the threads are damaged, install a new radiator.
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If the threads show no sign of damage, proceed to the next step.
8. CAUTION: Thread sealant or tape should never be used on the threads of the transmission fluid cooler fittings. The use of such materials will
create a leak path.
Install a new O-ring on the transmission fluid cooler fitting.
9. NOTE: Do not use air tools to tighten the transmission fluid cooler fitting. Use a hand-operated torque wrench only.
Making sure that the gasket between the transmission fluid cooler and the inside of the radiator tank is still in place, install the transmission fluid
cooler fitting.
10. Follow the procedure to install a new O-ring on the other transmission fluid cooler fitting.
11. Make sure that no radiator coolant has entered the transmission fluid cooler. Install the radiator in the vehicle.
12. Verify that both the transmission and the engine cooling system are at the correct fluid levels.
