A/T - AOD Auxiliary Cooler Service Tips
SIL 86-8 MaySUBJECT: FORD
TRANSMISSION - AUTOMATIC - AUXILIARY COOLER SERVICE TIPS (DURING TRANSMISSION OVERHAUL) - POLICE, TAXIS AND VEHICLES EQUIPPED WITH TRAILER TOWING.
FORD: 1985 FORD, THUNDERBIRD, LTD, CROWN VICTORIA
LINCOLN-MERCURY: 1985 LINCOLN, MERCURY, COUGAR, MARQUIS, GRAND MARQUIS
When overhauling an automatic transmission for a concern of slipping shifts and/or general transmission degeneration with evidence of overheating, inspect the auxiliary cooler hose and/or metal cooler line for kinks. Kinks can restrict the fluid flow resulting in a loss of transmission lubrication and subsequent transmission overheating and damage. Confirmation of overheating can be determined by a burnt smell from the transmission fluid, burned clutches and bands, heat stained blue surfaces on the forward sun gear, reverse sun gear and drive shell, and/or planetary assemblies.
To determine if a kinked auxiliary cooler hose is present, visually check and feel the underside of the auxiliary cooler in and out hoses especially where any bend in the hoses occur. The auxiliary cooler hose could be kinked on the underside where it is not visually apparent. Refer to Figure 1.
Also check the metal cooler lines, especially the metal lines from the radiator in-tank cooler to the rubber hose connection of the auxiliary cooler. The metal cooler line routing could be crossed causing a kinked hose condition. Refer to Figures 2 through 4 for the correct positioning of the metal cooler lines.
The Thunderbird/Cougar and LTD/Marquis applications may have a fuel line shield over the short ends of the auxiliary cooler hoses for reinforcement. However, the plastic shields may not be properly positioned over the curved portion of the hose and this would still allow the hose to kink. Refer to Figure 1, bottom illustration.
If a kinked hose condition does exist, or if the metal cooler lines are incorrectly positioned, follow the correction procedure outlined below:
1. Disconnect the short rubber hoses from the cooler tubes behind the radiator.
2. Disconnect the long rubber hoses at the auxiliary cooler in front of the radiator.
3. Remove and discard the entire circuitry including the "H" fitting.
4. Inspect the metal cooler lines routing behind the radiator and reposition if necessary, according to Figures 2 through 4.
5. Replace the auxiliary cooler for vehicles built before June, 1985. For service replacement use only auxiliary cooler part number E4TZ-7A095-B. The vehicle build date can be found on the upper left corner of the vehicle certification label. The label is affixed to the left front door lock panel or door pillar.
6. Obtain two "pre-formed" hoses, part number E5SZ-7B093-A.
7. For the Lincoln, Crown Victoria/Grand Marquis applications only, the straight end of the hose (side that connects to the auxiliary cooler) must be cut to fit.
The length of the hose will vary between these vehicles. Be sure to allow enough hose for smooth bends where necessary.
8. Attach the pre-formed ends of the hose to the metal tubes behind the radiator with worm drive screw clamps, 376240-S100 - torque to 25-35 in.-lbs. (2.8-4.0 Nm.) Attach the straight ends of the hose to the auxiliary cooler matching the connections with the installation views attached using screw drive clamps as for pre-formed ends. Refer to Figures 2 through 4 for installation views by vehicle application.
9. The cooler lines, the in-tank cooler and the auxiliary cooler should be throughly FLUSHED out before installing the transmission.
PART NUMBER PART NAME CLASS
E4TZ-7AO95B AUXILIARY COOLER C
E5SZ-7B093-A PRE-FORMED HOSES (2 REQUIRED) C
376240-S100 HOSE CLAMPS (4 REQUIRED) RG