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96 Dodge Ram 5.2 2 WD/AutoTrans.shift info needed

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Jim Hancock View Drop Down
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Joined: 11 Sep 2009
Location: EL Reno, Ok.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jim Hancock Quote  Post ReplyReply Direct Link To This Post Topic: 96 Dodge Ram 5.2 2 WD/AutoTrans.shift info needed
    Posted: 01 Jul 2019 at 8:45pm
Calling all '96 Dodge Ram pickup experts! 
My pickup wasn't shifting into 4th except when it wanted to, and then finally wouldn't.  Took to transmission shop where they serviced it, checked all of the grounds, installed a new OD switch and a new computer programmed for it. 
Still wasn't shifting. After chewing on it awhile of a possible cause, he called Dodge to ask questions about this particular year and model of why it wouldn't shift. They told him that they had some in the past with those symptoms and ended up being the alternator needing replaced.
They unhooked the alternator, fully charged the battery and took it out for a test drive. 
The pickup shifted just fine like it was supposed to and stayed in 4th like nothing was ever the matter. 
They couldn't let me change the alternator on their lot, so I hauled it home and installed a new alternator from the original at 366,xxx miles - if it was the original- it sure looked like it. BTW, this transmission had new guts put in it 62,000 miles ago at the same shop and had no problems up until this started. This really had them scratching their heads. And they were very fair on their price for the work that they have done on it both times. I'm happy with them. 
With the new alternator on, it still doesn't shift into 4th, like it did before. It can shift up that "half" gear when I push the OD button, like before, and I can drive around town 45-50 mph without really overspeeding the engine and sucking gas. 
So, my question is this, what is the connection with the alternator having to do with the transmission not being able to shift into 4th when it's hooked up? Sounds like something electrical, but what???
Or, is there anything else that might have been overlooked or not thought about? 
Thanks for any input. Jim
How blessed we are by HIS GRACE!
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Mactractor View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mactractor Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jul 2019 at 3:36pm
Engine speed/tachometer sensor commonly alternator mounted.
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Brian Jasper co. Ia View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian Jasper co. Ia Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jul 2019 at 9:41am
I ran into a similar situation once. The complaint was shifting in and out of overdrive intermittently. I ended up calling the Star Center (Chrysler tech assist) and they told me to add a ground wire from the PCM to the engine IIRC.
"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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festus51 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote festus51 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jul 2019 at 10:00am
Brian,  I am having that same problem on 02 cummins 2500.   I need to ask what is PCM  and engine IIRC ?     TIA
We the unwilling Led by the unqualified Doing the impossible for the Ungrateful
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