I own a 2006 Zephyr with similar issues. My dealer reset the transmission which briefly helped but the problem quickly came back. My son is a certified Master Mechanic with Ford but in business for himself. He tested the car and told me the valve body was bad, printed out the TSB's (technical service bulletins) issued by Ford for the 2006 Zephyr, 2007-08 MKZ's and other models equpped with an Aisin transmission. My car was a certified Preowned vehicle and I have the ESP Premium coverage for it. I took the car back to the dealer, who is replacing the valve body, it's being covered by the warranty and the $100.00 deductible is being waived because the valve body should have been replaced the 1st time. The TSB states that if there are no "codes" showing, the car has over 20,000 miles, the valve body should be replaced. It's an expensive repair but Ford is aware of the problem. Contact your dealer, let them know you are aware of the TSB's issued for the car, especially if you have the ESP protection. If not for my son I wouldn't have known. If you need any further info, contact me, I'll be glad to help you. My car has 62,000 miles, I love it and I'm sure glad I found the problem before I hit the 75,000 limit for the warranty.
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Hello
The engine
and automatic transmission in this vehicles drive train
are fully electronically controlled by a computer called the PCM and
TCM (Power Train Control Module, Transmission Control Module). When a
problem like this or other drive-ability related problems occurs the
computer stores a record of the problem (there are of course some
exceptions to this, like the fuel pump, engine coolant temperature
sensor and MAF sensor for instance) in the form of a fault code in
its memory, to read these fault codes you must have the systems
memory scanned with a special tool. Once the fault code(s) are read
you then must perform the appropriate diagnostic testing to find and
resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL
A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR
HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM
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