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Old February 9th, 2012, 12:44 PM   #1
tom77cj5
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Default 96 f250 eo4d in limp mode

My trans in one of my plow trucks started acting up last week and before I drop the pan I figured I would ask here. If you put it in d it stays in first unless you shift manually to second then if you shift back to drive its like it goes into neutral. I've changed the vss. On the rear diff, pulled the cover to make sure the tone ring is good and changed diff fluid. Been scanned with a totl snapon scanner and has no codes. I've cleaned all the trans plugs and took apart the power distribution box to look for broke wires. No blow fuses. When it doesn't shift it throws the abs light but no code. Also swapped in a diff abs controller to no avail. This year is the easiest plowing i've done. I basically get payed to drive around so I know its not been beat and it hasent gotten over 160*. Also had the alt tested and it's good. Any help is appreciated
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Old February 9th, 2012, 02:36 PM   #2
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I've cleaned all the trans plugs and took apart the power distribution box to look for broke wires.
Did you check the soleniod packs or plastic box on the side where the linkage hooks up?
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Old February 9th, 2012, 10:20 PM   #3
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could be a TPS sensor.
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Old February 9th, 2012, 10:39 PM   #4
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I had a similar issue with my e40d. I changed the tps and it fixed the problem. I also had another e40d with same thing and it was the MLPS on the shift arm.. Do not mess with drooping the pan until you change both o these first!!
I replaced my trans and the new one had the same problem.. Come to find out it was my EEC. I replaced it and good to go.
If I were you 100% start with the tps.. Then the MLPS
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Old February 9th, 2012, 10:48 PM   #5
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Cleaned both connections. Tps tests fine or the scanner says it does. If anything I would try the mlps but im getting tired of throwing $ at it. Any way to test that switch
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Old February 9th, 2012, 10:49 PM   #6
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Tests with a scanner or with volt neater?
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Old February 9th, 2012, 10:52 PM   #7
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Vss, tps, EEC, and MLPS are the only things that would make it do that. I would say tps if not MLPS
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Old February 9th, 2012, 11:11 PM   #8
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Pm'd you
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Old February 10th, 2012, 04:05 PM   #9
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Changed tps and mlps no change just like I figured
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Old February 20th, 2012, 05:08 PM   #10
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so between both of my 90s era plow trucks they have different computers so thats out. i just remembered i changed the filter and fluid this fall when i changed the trans cooler lines so maybe the filter fell off since that seems to be an issue with these trucks? either way im going to have to drop the dam pan once i have time to get it in the garage and check it out.
i need the f6uf-12a650-nb computer if anyone has one i can try.
i found one for 99$ just waiting to findout if its from a ecm company or some backyard chopshop since i'm almost sure i will be wasting another $100 bucks on buying a computer and having the same issue
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Old February 20th, 2012, 05:24 PM   #11
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See if you can return it of it don't work. Buy one from autozone
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Old February 22nd, 2012, 10:50 PM   #12
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Fixed it. Mf switch was bad. No idea how it caused it but all back to normal again
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Old February 23rd, 2012, 06:57 AM   #13
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Ware is the mf located?
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Old February 23rd, 2012, 08:50 AM   #14
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Turn signal switch. Hazards were on but bony work. Turned them off and its fixed lol
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Old February 23rd, 2012, 09:18 AM   #15
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Weird lol my bronco will turn off cruise and turn off overdrive when I have a blown brake light bulb and use turn signals.
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