Explorer 4WD V6-4.0L (2009)
Transmission Cooler: Initial Inspection and Diagnostic Overview
Transmission Cooling
Inspection and Verification
NOTICE: Whenever a transmission has been disassembled to install new parts, the transmission fluid cooler and/or auxiliary cooler should be
replaced and the transmission fluid cooler tubes must be cleaned and backflushed to keep contaminants from entering the transmission, causing
internal damage.
NOTE: Cleaning and backflushing the transmission fluid cooler tubes, along with following all the normal cleaning and inspection procedures during
disassembly and reassembly, will keep contaminants from entering the transmission, causing a repeat repair.
When internal wear or damage has occurred in the transmission, metal particles, clutch plate material or band material may have been carried into the
torque converter and transmission fluid cooler. These contaminants are a major cause of recurring transmission failure and must be removed from the
transmission cooler system before the transmission is put back into use. Install a new transmission fluid cooler and/or auxiliary cooler and backflush the
transmission fluid cooler tubes.
When transmission fluid leakage is found in the transmission fluid cooler, install a new transmission fluid cooler.
If the fault is not visually evident, GO to Symptom Chart - Transmission Cooling or GO to Symptom Chart - NVH. See: Symptom Related Diagnostic
Procedures/Symptom Chart - Transmission Cooling See: Symptom Related Diagnostic Procedures/Symptom Chart - NVH
