E4OD Overheats in Overdrive
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From: Up North
E4OD Overheats in Overdrive
My 1990 F-250 with the 460 overheats when driving in overdrive.
driving a hundred miles will turn the trans fluid brown and the transmision is very hot even though it drives just fine. If I drive it out of overdrive I have no problems at all.
It all works fine except the overheating in overdrive, no flashing on the overdrive light.
The tans shop is not getting a code, they tell me they have to rebuild the tranny to the tune of $2500.
If anyone could give me some advice on this, I would appriciate it as I dont't know if rebuilding it is the answer.
Thanks
driving a hundred miles will turn the trans fluid brown and the transmision is very hot even though it drives just fine. If I drive it out of overdrive I have no problems at all.
It all works fine except the overheating in overdrive, no flashing on the overdrive light.
The tans shop is not getting a code, they tell me they have to rebuild the tranny to the tune of $2500.
If anyone could give me some advice on this, I would appriciate it as I dont't know if rebuilding it is the answer.
Thanks
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From: Up North
I took it to another transmission shop yesteday for another opinon. They found a code showing a bad overdrive seleniod. They said they could fix it in a few hours for $550, I thought a little pricey but was happy it could be fixed. A few hours later they called me and said that my front seal was leaking and that something more may be wrong with the transmission internally and that a rebuild would be the way to go as they did not want to change the selenoid and charge me $550 to have it not work.
Lazy K, I think you are right. I'm surley no expert but I would assume that a bad OD selenoid would make it so the converter doesn't lock, not sure on that though.
I don't know enough about transmissions to understand why the fron seal leak would indicate other problems.
As a side note this tranny shop has a reputation for honesty.
Lazy K, I think you are right. I'm surley no expert but I would assume that a bad OD selenoid would make it so the converter doesn't lock, not sure on that though.
I don't know enough about transmissions to understand why the fron seal leak would indicate other problems.
As a side note this tranny shop has a reputation for honesty.
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Sorry I can`t be more help but I would have thought if the O/D solenoid was bad you would have no O/D. However there is a solenoid for the converter lockup clutch.
If the trans was over heating then the front seal probably is leaking now.
It is fairly easy to tell if the converter is locking in O/D. Drive at a steady speed in O/D and look at the tach while pushing the brake pedal down about an inch (not enough to apply the brakes). If the engine revs suddenly increase then the converter was locked, if no change in revs then the converter was not locked.
Before you do that check to see that your brake lights are working correctly.
If the trans was over heating then the front seal probably is leaking now.
It is fairly easy to tell if the converter is locking in O/D. Drive at a steady speed in O/D and look at the tach while pushing the brake pedal down about an inch (not enough to apply the brakes). If the engine revs suddenly increase then the converter was locked, if no change in revs then the converter was not locked.
Before you do that check to see that your brake lights are working correctly.
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From: Up North
I'll drive it tonight and do this test.
If I understand what your saying, if the converter is not locking than it is slipping causing friction then making it overheat?
Why do the rpm's increase when applying the brakes? I'm wanting to learn more about these mysterious transmissions.
Thanks
If I understand what your saying, if the converter is not locking than it is slipping causing friction then making it overheat?
Why do the rpm's increase when applying the brakes? I'm wanting to learn more about these mysterious transmissions.
Thanks
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From: Up North
I drove it in OD and had no increase in RPM when applying the brakes enough to engage the brake lights.
So the converter is not locking up? I'm assuming that It is suppose to lock!
Does this mean a bad converter or bad lockup selonoid?
So the converter is not locking up? I'm assuming that It is suppose to lock!
Does this mean a bad converter or bad lockup selonoid?
Post Fiend
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If the clutch was locking the two halfs of the converter and then unlocked it the engine revs would increase a couple of hundred revs as the converter "slipped". the computer unlocks the converter every time the brakes are applied.
Once the trans shifts into O/D the converter clutch should lock it up.
I am surprised it is not throwing a code.
Another possibility is that the O/D clutch pack in the trans is slipping (hence the trans shop saying it needs a rebuild) but I would have thought that would be very noticable when driving.
Perhaps you could get a trans shop to put a scanner on it to see what the electronics are actually doing.
The real trans experts seem to be missing from here at the moment, maybe one of them will see your post and give you a better answer than I can.
One other thing I can point you to is a link to E4OD fault finding. Use the advanced search function and search for E4OD trans in a post by aRKToS and you will get a link to a free E4OD ebook which may help.
Once the trans shifts into O/D the converter clutch should lock it up.
I am surprised it is not throwing a code.
Another possibility is that the O/D clutch pack in the trans is slipping (hence the trans shop saying it needs a rebuild) but I would have thought that would be very noticable when driving.
Perhaps you could get a trans shop to put a scanner on it to see what the electronics are actually doing.
The real trans experts seem to be missing from here at the moment, maybe one of them will see your post and give you a better answer than I can.
One other thing I can point you to is a link to E4OD fault finding. Use the advanced search function and search for E4OD trans in a post by aRKToS and you will get a link to a free E4OD ebook which may help.
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Frmr Ford Trans Engr
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From: SE Florida
There is no overdrive solenoid in an E4OD.
There are two shift solenoids, one torque converter lockup solenoid, and one pressure control solenoid.
Does the OD OFF light come on when you press the OD OFF button?
The test of putting on the brakes lightly can be misleading. First you have to be cruising at a steady speed and holding the go pedal very still. Then without moving your right foot gently press the brake pedal. If your foot is not on the go pedal between 5% and 10% the test will not work.
There are two shift solenoids, one torque converter lockup solenoid, and one pressure control solenoid.
Does the OD OFF light come on when you press the OD OFF button?
The test of putting on the brakes lightly can be misleading. First you have to be cruising at a steady speed and holding the go pedal very still. Then without moving your right foot gently press the brake pedal. If your foot is not on the go pedal between 5% and 10% the test will not work.
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The OD off- lights up when I push the button. When I did the test with braking I was very steady on the throttle and used my left foot on the brake pedal.
The first time I got about 200 rpm increase, but I drove quite a few miles and did this test about another 15 times with no change in rpm. So I figured the first test was probably an unstable throttle foot.
I guess my tranny shop is full of crap when they told me they had a code for a bad OD selenoid, Unless they were talking about torque converter lockup selenoid and just figured I wouldn't understand.
The first time I got about 200 rpm increase, but I drove quite a few miles and did this test about another 15 times with no change in rpm. So I figured the first test was probably an unstable throttle foot.
I guess my tranny shop is full of crap when they told me they had a code for a bad OD selenoid, Unless they were talking about torque converter lockup selenoid and just figured I wouldn't understand.
Last edited by MT-F250; Sep 19, 2009 at 09:23 AM. Reason: Need to re word
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From: Up North
The leak isn't that bad.
Is anyone else out there that is also confident that the selenoid will fix the problem.
Is this a DIY fix, I have worked on a lot of vehicles just not transmissions.
Is anyone else out there that is also confident that the selenoid will fix the problem.
Is this a DIY fix, I have worked on a lot of vehicles just not transmissions.
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From what I understand talking to the trans shops all the selenoids are in a pack that have to be replaced as a whole unit.
I would be targeting the converter clutch lock selenoid as that seems consensus here.
Or have I been misinformed?
I would be targeting the converter clutch lock selenoid as that seems consensus here.
Or have I been misinformed?
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From: Up North
Mark,
As I said before I'm no expert on transmissions.
So I was just thinking, correct me if I'm wrong. If the torque converter isn't locking would that affect the other drive gears or just overdrive? It seems to accelerate good in all the other gears.
As I said before I'm no expert on transmissions.
So I was just thinking, correct me if I'm wrong. If the torque converter isn't locking would that affect the other drive gears or just overdrive? It seems to accelerate good in all the other gears.
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From: Myrtle Beach, SC
they are correct. all the solenoids are in a pack. http://www.transmissionpartsusa.com/...ds_s/11630.htm
check with the dealership on the price. thats was the best price i could find and i work for a performance trans shop.