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I have a 2002 Explorer XLT with 30,000 miles and have the same whistle noise at start up on really cold days. I have had problems with this noise since it had 13,000 miles on it. I took it to Ford and after several times trying to figure out what it was and them talking to the Ford engineer's found that the power vavle in the valve body of the transmission was the problem. Ford did not have any known fix at the time so they gave me a remanufactored Transmission and now the new Transmission seems to shift funny sometimes and slips alittle at times. Does not seem to have the power it had after they put new one in. They also reprgrammed the PCM for updates. I wonder if that caused the shifting to change for the worse?
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