E4OD Pump?
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Senior User
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From: NJ
E4OD Pump?
I have a 1996 f350 PSD CC LB
Im going to start this story off by rewinding to about August.
The truck would drive fine except going from first to second, it would delay but would go (sometimes I would have to let off the gas then press back down on the pedal for it to shift) Replaced the VSS and seemed to be better
About two-three weeks ago as the truck would warm up (after driving it for a while) when I would come to a stop, it would roll freely as if in neutral (but it would be in drive) and when I gave it some gas it would catch (sometimes hard) and go fine (in foward and reverse)
Fast foward to today
Driving home and it starts doing the slow to shift along with the acting as if neutral when warm, and then I notice the OD 'OFF' Light is flashing.
I got this truck from my neighbor knowing the transmission was re-done about threee years ago.
Plenty of fluid, new filter as of last week.
Now Heres what I want to know, can having a bad pump cause the light to flash?I seem to think it does not have enough pressure. Not having a code reader doesnt help much right now so I cant give you guys a code to go by. It seems as if it does not have enough pressure once its warm. Any ideas?
Im going to start this story off by rewinding to about August.
The truck would drive fine except going from first to second, it would delay but would go (sometimes I would have to let off the gas then press back down on the pedal for it to shift) Replaced the VSS and seemed to be better
About two-three weeks ago as the truck would warm up (after driving it for a while) when I would come to a stop, it would roll freely as if in neutral (but it would be in drive) and when I gave it some gas it would catch (sometimes hard) and go fine (in foward and reverse)
Fast foward to today
Driving home and it starts doing the slow to shift along with the acting as if neutral when warm, and then I notice the OD 'OFF' Light is flashing.
I got this truck from my neighbor knowing the transmission was re-done about threee years ago.
Plenty of fluid, new filter as of last week.
Now Heres what I want to know, can having a bad pump cause the light to flash?I seem to think it does not have enough pressure. Not having a code reader doesnt help much right now so I cant give you guys a code to go by. It seems as if it does not have enough pressure once its warm. Any ideas?
Post Fiend
Joined: Dec 2009
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From: Livoina,La
Mark answered your concern in the other thread
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From: NJ
Would it throw a code for low pressure?
And is the pump normally changed when a trans is rebuilt?
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
There is no code for low pressure. There are codes for long shifts that MIGHT be caused by low pressure. A bad pump is also not the only way that you will end up with low pressure. Internal leaks are usually the cause of low pressure.
The pump should be inspected and measured at a rebuild. If it is worn then it should be replaced. If it shows minimal wear (there are specs) then it can safely be reused.
The pump should be inspected and measured at a rebuild. If it is worn then it should be replaced. If it shows minimal wear (there are specs) then it can safely be reused.
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From: NJ
There is no code for low pressure. There are codes for long shifts that MIGHT be caused by low pressure. A bad pump is also not the only way that you will end up with low pressure. Internal leaks are usually the cause of low pressure.
The pump should be inspected and measured at a rebuild. If it is worn then it should be replaced. If it shows minimal wear (there are specs) then it can safely be reused.
The pump should be inspected and measured at a rebuild. If it is worn then it should be replaced. If it shows minimal wear (there are specs) then it can safely be reused.
Also the only long shift is from 1st to second, the rest works fine
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From: NJ
I know this is kind of a shot in the dark but should I try unhooking the batteries for a half hour and then see what it feels like? Ive heard that sometimes the computer just needs to be reset. Whadya think Mark, try it?
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Frmr Ford Trans Engr
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From: SE Florida
You'd do as much good by changing the summer air in the tires for winter air. There is NOTHING that resets on these computers.
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From: NJ
Also I noticed
1.the speedo starts bouncing at about 45-50 MPH (VSS WAS CHANGED)
2. when the trans goes into "neutral" it catches at 1200 rpm in fowards before it will move again, 1500-1600 reverse
3. It shifts fine between 1-2 AFTER you let off the gas
4.Also I went and payed more attention when it was delay shifting between 1-2 gear, it would go up to 2700-3000rpm before it would shift. If you let off the gas then went back on it, it would shift fine.
Now what?
Post Fiend
Joined: Dec 2009
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From: Livoina,La
Anytime you set a light never dissconect the batteries. All that does is clear the codes. Now you have two choices. 1. Drive till the code comes back to read it. 2. Start throwing parts at it. Then there's the chance that if you keep driving it like that you are just going to destroy the trans.
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From: NJ
Anytime you set a light never dissconect the batteries. All that does is clear the codes. Now you have two choices. 1. Drive till the code comes back to read it. 2. Start throwing parts at it. Then there's the chance that if you keep driving it like that you are just going to destroy the trans.
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From: NJ
Well I just got back from driving the truck around (drove 39 miles). No blinking OD light but it was still doing the neutral free rolling thing but i did notice that when shifting from first to second, it did take a while but it would shift (seemed to shift faster than the last couple days). I only had to let off the pedal once for it to shift otherwise if I stayed on the gas it would shift, however it was not right away.
I also did notice that when going to shift from 1st to 2ndthe tach would go up to 2500-2600, slowly go down to 2000-2100, then back up to about 2300-2400 and then all shifting while moving was normal from there. Why is it doing this?
Is it possible that my TC is starting to take a dump on me?
I also did notice that when going to shift from 1st to 2ndthe tach would go up to 2500-2600, slowly go down to 2000-2100, then back up to about 2300-2400 and then all shifting while moving was normal from there. Why is it doing this?
Is it possible that my TC is starting to take a dump on me?
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From: NJ
drove the truck for a while again today. Going out the driveway, had one long shift but i did not let off the gas until it shifted this time unlike I usually do. Didnt have a late shift since and I rode around in it for a while. It only did the neutral roll two times that I remember as well. This things got me so confused