How To Control TCC Lock Up

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Jan 12, 2015 | 09:04 AM

#91

subford

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From: Easton,Ks

Anytime you get a MIL on the cluster you need to find out what code you have in CM.
From the CM code we can help you find the problem.

Jan 12, 2015 | 09:11 AM

#92

dixie460

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Joined: Nov 2011

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From: SW Florida

Quote:

Originally Posted by subford

Yes it does. The only gears it does not lock in are 1st and R.

Actually it can lock in first too according to Mark K. See here: https://www.ford-trucks.com/forums/1...l#post14667332

Quote:

Originally Posted by animal_in_nm

OK here's how I fixed my problem. I replaced the instrument cluster. No more idle,shifting, or lock up problems. Solved ... Good luck.

So you had a bad PSOM.

Jan 12, 2015 | 09:42 AM

#93

subford

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From: Easton,Ks

Quote:

Originally Posted by dixie460

Actually it can lock in first too according to Mark K. See here: https://www.ford-trucks.com/forums/1...l#post14667332

I think I left out the word "Manual First".
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.

Aug 23, 2015 | 12:53 AM

#94

dusty_ranger

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sooo not to sound dumb but how dose this differ from the o/d on-off on the end of the shifter?

Aug 23, 2015 | 06:57 AM

#95

subford

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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.

Aug 23, 2015 | 07:58 AM

#96

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

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From: SE Florida

Quote:

Originally Posted by dusty_ranger

sooo not to sound dumb but how dose this differ from the o/d on-off on the end of the shifter?

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.

Aug 6, 2018 | 12:34 PM

#97

Chris Higgins

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Joined: Aug 2018

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Quote:

Originally Posted by subford

You would need to open (break) the wire or put it on a switch that would open (break) it then. That way the computer could not ground it to make the clutch come on.

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?

Aug 6, 2018 | 04:21 PM

#98

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

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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.

Apr 30, 2021 | 05:09 PM

#99

Quiron Ravenhawk

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Joined: Mar 2021

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From: Navajo Lake, nm

89 351w, tcc c6....

Quote:

Originally Posted by subford

I am not sure on a 1991 but if it is like a 1992 the posted diagram below will show you. C103 should be on the driver's fender.
No, the clutch is to give you more MPG, with out it, it will act like a TQ without a clutch.