Shifting

Asked by Nov 20, 2017 at 08:57 AM about the 2002 Dodge Ram Van

Question type: Maintenance & Repair

I have a 2002 dodge B300 van 5.9 gas
engine.  About 12 miles ago I had the
governor control switch and transducer
changed because it would not shift into
overdrive and the problem was solved.
Now ONLY SOMETIMES that happens. I
have put in a new rear o2  sensor,  
temperature control switch,  
I was told to unplug the Wires to the ECM
and should hear a hiss and I did. Plugged
it back in and was shifting like a champ.
Now after a couple of days it frequently
doesn't go into overdrive. Buthe I can shut
the engine off for a few seconds and it
will then go into overdrive. The check
engine light frequently comes on but does
not flash then it will just go off just here
and there. I'm thinking of changing the
transmission control switch a and
harness . Could this be the ECM bad or
going bad?  Has anyone ever run into this
before. No one I've talked to has. Not even
Dodge service. Why just tuning off the
engine and back on will make it shift
properly again?  I'd like to pin point the
problem before I piece by piece do a
rebuild.  

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