OEM 2009 Lincoln Town Car Automatic Transmission Oil Cooler Line

2009 Lincoln Town Car Automatic Transmission Oil Cooler Line Parts Q&A

• Q: How to service and repair the Automatic Transmission Oil Cooler Line for the 4R70E/4R75E on 2009 Lincoln Town Car?

  A: The first step to handle 4R70E/4R75E transmission fluid cooler tube maintenance requires hoisting the vehicle in neutral position. The cooling system requires complete clean-out of metal particles and clutch material because these substances cause transmission failure to happen again. The thermostatic bypass valve in oil-to-air (OTA) transmission fluid coolers makes them non-repairable products so replacement with new OTA transmission fluid coolers is required when the component shows either leakage or substantial wear. Use a suitable torque converter/fluid cooler cleaner to clean transmission fluid cooler tubes while creating a strong fluid flow before executing the following procedure. Weak or contaminated fluid flow will require replacement of the flush equipment filter. The transmission fluid cooler tubes should be detached from the OTA cooler for cleaning by installing two new rubber hoses to the transmission side of the steel tubes. A rubber hose must replace the OTA cooler before securing the tank pressure line onto the longest steel transmission fluid return tube with a tank return hose extending into the fluid tank reservoir. Activate the pump to allow transmission fluid circulation for 5 minutes with switching the pump on and off to clear away contaminants. Turn off the pump while you remove the pressure hose from its connection with the return tube. Start by blowing out all remaining fluid from the transmission fluid cooler and its tubes through compressed air. Then reinstall the OTA cooler tubes by disconnecting the rubber return hose from the steel tube which remains. The coolers might still contain trapped contamination therefore replacing the OTA cooler with a new one will guarantee proper operation.