Question about 1990 Ford F250

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1990 Ford f-250 transmission

I changed the PCM unit from service truck to the extended cab and the problem still remains. I still have to manuely shift 1st. 2nd,ect. after every stop. Thankyou for the advice, and I'm open for any kind of solutions that might shine some light on this PROBLEM!!! Any advice would be greatly appreiated. Thankyou!!!

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WHAT IS THE ELECTRICAL
COMPONENT THAT TELLS THE TRANSMISSION TO SHIFT

Posted on May 02, 2013

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Make sure the vaccum line on the pass side of the tranny is good. No vaccume, no shift. At least it didnt on mine.

Posted on Mar 13, 2009

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  • Master
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What exactly is the trans doing/ not doing?

Posted on Nov 22, 2008

  • JOHN May 02, 2013

    SHIFTS EARLY

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