It can be either one! There is a TSB(technical service bulliten) on the transmission torque converter not unlocking due to wear.
CD4E - ENGINE STALLING ON ENGAGEMENT/STOPPING TECHNICAL SERVICE BULLETIN Reference Number(s): 07-5-6, Date of Issue: March 19, 2007 Related Ref Number(s): 07-5-6 ARTICLE BEGINNING ISSUE Some 2005-2008 Escape and Mariner vehicles equipped with a CD4E automatic transaxle and built from 8/1/2004 through 2/15/2007 may exhibit an engine stall when coming to a stop or when engaging the transmission into drive or reverse. This condition may be intermittent and often occurs after extended drives. There may be no diagnostic trouble codes (DTCs) stored. This may be caused by internal wear in the torque converter which prevents it from unlocking. ACTION Follow the Service Procedure steps to correct the condition. SERVICE PROCEDURE 1. Inspect and repair all non transaxle codes per Workshop Manual (WSM) and Powertrain Controls/Emissions Diagnosis (PC/ED) manuals. 2. Use the Integrated Diagnostic System equipment to monitor the PIDs (Parameter Identification) for TC_SLIPACT as the stall is occurring. A. If the slip is greater than 20 RPM, the stalling is not transaxle related. Repair following PC/ED procedures for engine stalling condition. B. If TC_SLIPACT is less than 20 RPM with the transmission in park or neutral, torque converter internal failure is the most likely cause, proceed to Step 3. 3. Remove the transaxle assembly and check the rotation of the torque converter in the bell housing. A failed converter will be difficult to rotate. 4. Remove the torque converter, drain the automatic transmission fluid (ATF) and refill the CD4E transmission assembly using MERCON(R) V ATF. 5. Install a new torque converter and reinstall the transaxle assembly. 6. Back flush the transmission cooler system as described in the WSM, Section 307-01A. PARTS INFORMATION
FORD: 2005-2008 Escape MERCURY: 2005-2008 Mariner
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Friday, August 7th, 2009 AT 4:52 PM