E4OD shift problems '97 F250 HD
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E4OD shift problems '97 F250 HD
Hello Ford Truck enthusiasts. I am very happy to finally be a member of your site. I've read your threads on Ford Truck issues and have always found them useful. I have a new problem that I need help with. I have a '97 F250 HD with 5.8 and E40D 4x4. After I put the truck in drive and accelerate, the truck goes back & forth between 1000-2000 rpms continuously until 35 mph, then it shifts into high gear and will not downshift. After that it runs fine -- the overdrive goes on and off with the button. Fluid and filter were changed by a transmission shop. No codes on engine or transmission. Transmission shop says it is a "ground issue" -- possibly in the PCM. Have checked all grounds on frame and engine -- all are good. Please help. Thanks. Secret Squirrel 53
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From: Easton,Ks
The frame does not need to be grounded unless you are pulling a trailer but the body sure needs to be. The body ground is the ground for just about every thing on the truck. The engine ground is just for the starter, charging and spark.
That said what does your speedometer do all the time this is happening?
The body ground, note the small wires to the left coming out of the body ground point, that is the computer ground wires for pins 40 & 60.:
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That said what does your speedometer do all the time this is happening?
The body ground, note the small wires to the left coming out of the body ground point, that is the computer ground wires for pins 40 & 60.:
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Subford
Thanks for your great info on my ground issues.I was never told about the two pin grounds until now.After six months of trying to fix problem have good help.Spedo works fine.Replaced speed sensor,tps, fluid and filter changed.Trany shop put truck on computer and it drove and shifted fine and hooked truck computer back up and original problem came back.Was told only it was a ground problem.Ill be checking and cleaning grounds shortly. Thanks
Fleet Owner
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From: Kentucky
No....not going to work.
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E40D shift problems continue
Have tried all info given and problem still continues.Truck takes off and stays pinned between one to two k rpms back and forth until 30 mph where trans goes to forth and stays.Will not down shift. OD works fine.WTF?.Please help
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From: Easton,Ks
What do you mean by "No codes on engine or transmission.".
Are you getting 111 in all three code read outs (KOEO, CM & KOER)?
Or are you not able to get any codes at all including the 111?
If you can not get any codes then more than likely you have a bad computer.
Are you getting 111 in all three code read outs (KOEO, CM & KOER)?
Or are you not able to get any codes at all including the 111?
If you can not get any codes then more than likely you have a bad computer.
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Fleet Mechanic
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From: MD
What happens if you shift it manually? Anything different?
All new to me, I'm just learning -rebuilding the E4OD in my Lightning ATM - but thinking maybe a prob with the intermediate sprag might cause what you're describing.
All new to me, I'm just learning -rebuilding the E4OD in my Lightning ATM - but thinking maybe a prob with the intermediate sprag might cause what you're describing.
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97 F250
Subford Your knowledge on fords is awesome.ALL codes were 111 according to the Acton scanner.I used the EEC IV plug under hood on driver side.I also found a connector under ashtray that I have read is a code reading plug.Confussing situation.Just got off work and saw your post from this morning.Mucho Thanks.
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From: Easton,Ks
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