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2002 Ford Windstar transmission shifts back and forth from

Tiny
CCNORCANA
  • MEMBER
  • 2002 FORD WINDSTAR
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 35,000 MILES
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!
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Thursday, August 13th, 2009 AT 5:12 PM

2 Replies

Tiny
JIS001
  • MECHANIC
  • 3,411 POSTS
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.
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Thursday, August 13th, 2009 AT 10:36 PM
Tiny
SCHRIMPIEMAN
  • MECHANIC
  • 166 POSTS
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.
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Friday, August 21st, 2009 AT 6:32 PM

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