Automatic shifting issues with 2001 7.3L F250
Just today it starting staying in (I think) 3rd and reving up rather than moving onto fourth. (Didn't rev like it was in neutral. It was still accelerating but the RPMS were wound way up) If I accele...
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cannesdo wrote:
Ok, found out that more specifically it means the turbo boost pressure is low.
Low boost causes you to require more throttle to do the same work. The transmission however relies on the throttle position sensor for shift point, and doesn't really know how much power the engine is making (or not making).
Adress the boost issue, and shifting issue will probably go away.
Are you running a K&N filter? Pretty common for them to allow abrasives into the turbo which eats up the impeller. And it could also be a restriction pre-turbo, or a leak after the turbo. Small leaks make lots of noise, but large leaks sometimes can't be heard over the other engine noise (usually you can hear more turbo whine though).
