F 250 2WD Pickup V8-5.4L CNG VIN M (1999)
5. Lower the vehicle.
6. Reconnect the battery ground cable.
7. Fill the transmission with Motorcraft MERCON or MERCON V (ATF) Transmission Fluid or equivalent Meeting FORD specification. Check for
proper operation.
Disassembly and Assembly
Special Tools
Disassembly
NOTE: The cooler bypass valve needs to be thoroughly cleaned and flushed out at this time.
1. Remove and inspect the cooler line case fittings. If the cooler line case fittings are damaged replace the cooler line case fittings.
2. NOTE: Damaged sealing washers will cause transmission fluid to leak at the cooler bypass valve.
Remove the rubber-coated sealing washers. Inspect the sealing washers. Replace as required.
