91 F250 Trans Problem!
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Freshman User
Joined: Nov 2005
Posts: 30
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91 F250 Trans Problem!
I have a 91 f250 with a rebuilt trans in it. Rebuilt about 8 months ago and it just started shifting from second to third back & forth until you get up to a good speed and then it will stop. When it was rebuilt everything thing was upgraded, does this sound like a easy fix?
Thank for your help.
Thank for your help.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,714
Likes: 2,639
From: SE Florida
It could also be a throttle position sensor or a vehicle speed sensor, if it's an E4OD. Forget that if it's a C6. With a C6 it could be a sticky governor, a bad modulator valve, or a vacuum leak to the modulator.
