Question about 1991 Ford F250

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Trans not shifting properly

I have a 1991 F250 4x4 7.3L pickup which is having trouble up-shifting. I have to rev it up to 3k rpms to get it to shift. I was told to try the throttle position sensor. I tried adjusting the old sensor with no improvement. I put a new one on and tried to adjust that and still no improvement. I am thinking that the problem maybe in the trans valve body.

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  • thomaseagle Apr 14, 2009

    yes i have done that already.

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You should check your trans fluid first and make sure it is not low. Check it with the vehicle warmed up, running in park

Posted on Apr 14, 2009

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