E4od Need Help
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Joined: Nov 2003
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E4od Need Help
1992 F-150 5.0 4X4, WHEN COLD TRUCK SHIFTS FINE,WHEN WARMED UP IT SEEMS TO HAVE A DOUBLE SHIFT TAKE PLACE GOING FROM 2ND TO 3RD. WAS TOLD IT IS CALLED LOCKOUT ,BUT I WAS WONDERING SHOULD THE SHIFT FROM 3RD. TO LOCKOUT BE THAT CLOSE IN THE SHIFTING PATTERN.WAS PUT ON THE COMP. AND NO CODES CAME UP. AND WHAT IS CONVERTOR SHUDDER AND WHAT ARE THE SYMTOMS OF THAT.THANKS!!
Posting Guru
Joined: Dec 2002
Posts: 1,113
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From: Remsen, NY
It's probably fine. What happens is that after you go to 3rd, the computer locks up the torque converter, it's sort of like slipping the clutch and finally letting it completely out, but it's fluid so it's normal for it to be slipping until it's told to actually lock.
Shudder you would know, apparently it almost bucks when it's trying to lock up.
Shudder you would know, apparently it almost bucks when it's trying to lock up.
Post Fiend
Joined: Jun 2001
Posts: 5,228
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From: Running Springs CA
The computer tries to go into lockup as soon as it can. This helps fuel mileage and keeps the transmission cool. There is no set pattern, it is based on load, throttle position, etc.
Jim
Jim
Postmaster
Joined: Mar 2001
Posts: 4,968
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From: So Cal
Converter shudder is when the lockup clutch is slipping. You can typically feel this when you are driving under mild acceleration between 45 and about 60mph. It will cause a vibration kind of like driving on grooved pavement. Under moderate or hard acceleration you won't feel it. The shudder occurs as the clutch slips.
I am no tranny expert but have read the lockup will engage under mild throttle in 3rd gear but normally you won't feel it until you go into OD. Usually the tranny will shift from 3rd to OD then lockup. I have not noticed the "second shift" while in 3rd, but may have not paid attention.
Good Luck,
Jim Henderson
I am no tranny expert but have read the lockup will engage under mild throttle in 3rd gear but normally you won't feel it until you go into OD. Usually the tranny will shift from 3rd to OD then lockup. I have not noticed the "second shift" while in 3rd, but may have not paid attention.
Good Luck,
Jim Henderson
Senior User
Joined: Nov 2003
Posts: 423
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From: Providence, RI
I just picked up a '97 F250HD with the E4OD tranny. On my test-drive, it would "stutter" or shake in 3rd gear at more than 1/4-throttle in the 35mph+ range. The engine and tranny were cold at the time. Is that what a slipping lockup clutch feels like?
In any case, it seems to have gone away. This truck was sitting for a few months; is it possible that the lockup clutch stops slipping once it's seen fluid for a while?
In any case, it seems to have gone away. This truck was sitting for a few months; is it possible that the lockup clutch stops slipping once it's seen fluid for a while?
Elder User
Joined: Apr 2002
Posts: 541
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From: Victoria, Texas
I would say that was the TC clutch slipping. As to why it stopped, it's hard to say. I would get new fluid in that truck if you don't know the history or if it hasn't been changed in a while. Make sure you drain the pan AND the torque converter.
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