2002 Ford Windstar transmission shifts back and forth from

2002 FORD WINDSTAR
35,000 MILES • 6 CYL • FWD • AUTOMATIC
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CCNORCANA
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my transmission once i get to 35mph til i get to 50 shifts back and forth between gears, someone told me it was that my computer chip for my transmission is bad and needs to be replaced, i have tried finding one online at parts store, but it says no such part found and only lists a relay switch for it, i am wondering if the relay for the transmission is the same thing as what someone told me i needed, i am also trying to find out where it is located, if it can be replaced without pulling my transmission out or if the transmission has to be pulled to get to it....any help would be apprectiated!!
Aug 13, 2009 at 5:12 PM
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JIS001
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You need to have it diagnose to see if it is an electrical or mechanical problem. As for the chip the transmission control module would be the part they are talking about and is only available at Ford? Also Ford may need to program the module as well. And it can be pretty expensive so really get it diagnosed properly.
Aug 13, 2009 at 10:36 PM
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SCHRIMPIEMAN
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Hook up a scanner which can read the throttle position sensor value.

I recently (August 20th) placed a post entitled
1995 Windstar: Solution for Hard Shift/No shift

Read thru it and see if it matches your description.
Aug 21, 2009 at 6:32 PM
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