Ford F150 Pickup. Manual — part 1815

Fig. 5: Identifying 4R70W Transmission With Auxiliary Transmission Fluid Cooler
Courtesy of FORD MOTOR CO.

2003 Ford Pickup F150

2003 TRANSMISSIONS Transmission Cooling - F150 Pickup

Fig. 6: Identifying 4R100 Transmission With Auxiliary Transmission Fluid Cooler
Courtesy of FORD MOTOR CO.

DIAGNOSIS & TESTING

TRANSMISSION COOLING

Inspection & Verification

2003 Ford Pickup F150

2003 TRANSMISSIONS Transmission Cooling - F150 Pickup

1. Visually inspect for obvious signs of mechanical damage, incorrect component installation, and system

leaks. Repair as necessary.

z

Install a new or remanufactured radiator when fluid is found leaking from the intank transmission
fluid cooler. Refer to ENGINE COOLING - F150 PICKUP .

z

Install a new auxiliary transmission fluid cooler if there is leakage from the fluid cooler. Refer to
AUXILIARY TRANSMISSION FLUID COOLER .

2. If the fault is not visually evident, GO to SYMPTOM CHART .

Symptom Chart

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, the intank transmission fluid cooler, and
the auxiliary transmission fluid cooler, if so equipped. These contaminants
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. Refer to AUTOMATIC
TRANSMISSION-4R100 - F150 PICKUP or AUTOMATIC TRANSMISSION-
4R70W - F150 PICKUP for fluid cooler flow testing, backflushing and
cleaning, torque converter cleaning and inspection, and flushing. Refer to
AUTOMATIC TRANSMISSION-4R100 - F150 PICKUP (4R100 only) for
Cooler Bypass Valve (CBV) assembly (7H322) cleaning and flushing.

2003 Ford Pickup F150

2003 TRANSMISSIONS Transmission Cooling - F150 Pickup

Fig. 7: Symptom Chart
Courtesy of FORD MOTOR CO.

REMOVAL & INSTALLATION

AUXILIARY TRANSMISSION FLUID COOLER

Special Tool(s)

2003 Ford Pickup F150

2003 TRANSMISSIONS Transmission Cooling - F150 Pickup