How To Control TCC Lock Up
Postmaster
Joined: Nov 2011
Posts: 3,533
Likes: 17
From: SW Florida
Actually it can lock in first too according to Mark K. See here: https://www.ford-trucks.com/forums/1...l#post14667332
So you had a bad PSOM.
So you had a bad PSOM.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
Actually it can lock in first too according to Mark K. See here: https://www.ford-trucks.com/forums/1...l#post14667332
It does not lock in "Manual First" under any conditions.
This is stated in the "E4OD Automatic Transmission Reference Manual" in chapter "Theory/Operation" page 8.
I think we are talking about the E4OD transmission in this thread.
/
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
Without reading this whole thread all over again.
How does what differ from the O/D button on the end of the stalk?
If this is what you are asking:
O/D has nothing to do with the TCC lock up as the transmission will do a TC lock up in O/D and out of O/D.
How does what differ from the O/D button on the end of the stalk?
If this is what you are asking:
O/D has nothing to do with the TCC lock up as the transmission will do a TC lock up in O/D and out of O/D.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,723
Likes: 2,650
From: SE Florida
OD (overdrive) is fourth gear in the transmission. When you press the button on the end of the shifter and the OD OFF light is on the transmission won't shift to fourth gear. Torque converter lockup can happen in third gear and fourth gear, and in some limited amounts in first and second gears, too.
New User
Joined: Aug 2018
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M
My 91 F-150 stalls when I put the auto trans in gear! Would putting a switch to operate the TC lock possibly help me?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,723
Likes: 2,650
From: SE Florida
The first thing to do is to check codes. Here's How
Then decide if you want a work around, or want to fix it. Fixing it may be easier than adding a switch.
Then decide if you want a work around, or want to fix it. Fixing it may be easier than adding a switch.
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Joined: Mar 2021
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From: Navajo Lake, nm
89 351w, tcc c6....
@55mph The rpm is 2600....should b 1800 or so, also no power on a 10 degree grade...terrible gas mileage!!!!
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