Auto trans shifting
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Elder User
Joined: Sep 2015
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From: Otto, NC
Auto trans shifting
My auto trans acts up from time to time. It down shifts at the wrong time, won't go into overdrive unless I speed up and let off. It's been fine for weeks and then it will act up. I'm thinking its electronic? My tester is at home, we've been away for 3 months, so I'll check for codes asap. Your thoughts?
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Elder User
Joined: Sep 2015
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From: Otto, NC
My scanner is an OB2! Won't work on a 97 7.3. What are you using to scan?
I'll post another thread on this so it gets looked at but the truck seemed to skip under load. The scanner for the diesel should pick up on this too
I'll post another thread on this so it gets looked at but the truck seemed to skip under load. The scanner for the diesel should pick up on this too
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,738
Likes: 2,668
From: SE Florida
That sounds unlikely to me, but if we had the codes I could make a really good guess.
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Senior User
Joined: Jan 2014
Posts: 186
Likes: 0
From: Indiana
the neutal safety switch does more than that
I was having a problem with my overdrive not working and the light would flash,it would slip all forward gears randomly.
I checked and replaced the mlps and haven't had a problem since.
It does a lot more than an old neutral safety switch.
I was having a problem with my overdrive not working and the light would flash,it would slip all forward gears randomly.
I checked and replaced the mlps and haven't had a problem since.
It does a lot more than an old neutral safety switch.
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Elder User
Joined: Sep 2015
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From: Otto, NC
How do I get the codes? I have a scanner but for OB2 only. I thought Auto Zone could scan for me but was told here they they couldn't do it. What do I need for a scanner where can I go. It might also discover why the truck vibrates with a load or acceleration. Taking my foot out of it will stop it from doing so.
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
You probably have a bad/weak injector.
Most consumer scan tools will not work on a 1997 7.3 PSD, despite it having the OBD-2 port. You'll either need to get a specialized scan tool, or bring it to a dealer.
Most consumer scan tools will not work on a 1997 7.3 PSD, despite it having the OBD-2 port. You'll either need to get a specialized scan tool, or bring it to a dealer.
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