E4OD, Need Help
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Elder User
Joined: Dec 2000
Posts: 808
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E4OD, Need Help
[updated:LAST EDITED ON 18-Mar-02 AT 10:11 PM (EST)]Hi All, I hope this is not serious?
Today I got into my F250 to go to work and it would not shift normally. In order for it to shift I would have to drive way beyond the acceptable RPM range in order for it to shift. From 1st to 2nd, about 35mph. 2nd to 3rd 50 to 60 and 3rd to OD about 75 to 80. Once it's in OD it ok until it get under 60 then it shifts back down to 3rd. Now, if I get into OD and mash the gas (as to pass a slower car) it will downshift but will not shift back to OD unless I get over 80.
Does anyone have a clue what could be causing this? Is there a fuse or something controlling the shift points for the tranny? What about the computer?
The truck has 95K on it and the filter/fluid is changed every year. Truck is kept in excellent working condition.
Oh, btw, I do have the Banks Trans Command installed. I bypassed the unit and it does the same thing. I also, noticed that it was hard to start a few times. Once started it would idle much higher than normal.
Any advice is welcomed.
Thx,
Eddy
Today I got into my F250 to go to work and it would not shift normally. In order for it to shift I would have to drive way beyond the acceptable RPM range in order for it to shift. From 1st to 2nd, about 35mph. 2nd to 3rd 50 to 60 and 3rd to OD about 75 to 80. Once it's in OD it ok until it get under 60 then it shifts back down to 3rd. Now, if I get into OD and mash the gas (as to pass a slower car) it will downshift but will not shift back to OD unless I get over 80.
Does anyone have a clue what could be causing this? Is there a fuse or something controlling the shift points for the tranny? What about the computer?
The truck has 95K on it and the filter/fluid is changed every year. Truck is kept in excellent working condition.
Oh, btw, I do have the Banks Trans Command installed. I bypassed the unit and it does the same thing. I also, noticed that it was hard to start a few times. Once started it would idle much higher than normal.
Any advice is welcomed.
Thx,
Eddy
Laughing Gas
Joined: Nov 2001
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E4OD, Need Help
Have you tried contacting Banks? I have the transcommand also, and when I was installing it I ran into a prob they solved via next day air for free, and thier tech support was VERY informative.
Junior User
Joined: Mar 2002
Posts: 81
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From: Ottawa Ontario Canada
E4OD, Need Help
[updated:LAST EDITED ON 19-Mar-02 AT 01:14 PM (EST)]Two things come to mind. I had this problem in a car with a non computer controlled trans. It was due to sludge buildup in the valve body. The solution was to remove the valve body, disassemble and clean. Since you changed the fluid every year, this may not be the problem.
So the other thing that sounds plausible, is that since each shift is late, it may be that the computer thinks you are going slower than you actually are. The vehicle speed sensor (VSS) may be bad, or wire leading to it from the computer.
I think it is more likely the VSS, since if it was a dirty valve body downshifting would be slow to happen as well.
I would call up Banks and ask their advice before purchasing expensive sensors...
So the other thing that sounds plausible, is that since each shift is late, it may be that the computer thinks you are going slower than you actually are. The vehicle speed sensor (VSS) may be bad, or wire leading to it from the computer.
I think it is more likely the VSS, since if it was a dirty valve body downshifting would be slow to happen as well.
I would call up Banks and ask their advice before purchasing expensive sensors...
Freshman User
Joined: Mar 2002
Posts: 43
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From: St. Louis USA
E4OD, Need Help
[updated:LAST EDITED ON 19-Mar-02 AT 03:14 PM (EST)]Just a thought, I had a bad throttle position sensor cause this same behavior on another ford that I had! Acted the same way until it got so bad it would'nt come out of first at all! Rick
Thread Starter
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Elder User
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E4OD, Need Help
Update, The TPS was the culprit. Did a test of the TPS on and off the truck. Test came up positive. I knew that sensor tester would pay for itself one day.....whewwwwww. $28.00 bucks for a FoMoCo TPS and a hour of work. Can't beat that.
Thx for the input Rick. Truck shifts like a dream now. I wonder if that would effect my gas mileage also?
Thank God for these forums!
Thanks again all.
Thx for the input Rick. Truck shifts like a dream now. I wonder if that would effect my gas mileage also?
Thank God for these forums!
Thanks again all.
New User
Joined: May 2002
Posts: 2
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From: mount airy
E4OD, Need Help
did your bad throttle sensor cause the check engine light to come on?? Did it give a code?
THanks.
Matt
THanks.
Matt
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