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How To Control TCC Lock Up

 
  #46  
Old 08-07-2007, 11:05 AM
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I was working with the harness that you posted a diagram for, the EEC harness, right under and to the side of the master brake cylinder.
 
  #47  
Old 08-07-2007, 11:31 AM
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Originally Posted by Skandocious
I was working with the harness that you posted a diagram for, the EEC harness, right under and to the side of the master brake cylinder.
What post number are referring to?
Do not recall telling anybody to do any thing to the EEC harness at the Computer.
 
  #48  
Old 08-07-2007, 11:40 AM
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Originally Posted by subford
Here is a link to a diagram:
http://i54.-----------.com/albums/g91/subford/Electrical/EEC%20PCM/19935.gif

But you should be able to find it up on the fender in plug C103.
C103, 5.8L LH side of engine compartment, top of wheel well Terminals:04 Color: BK.

Here is a link to a diagram of C103.
http://i54.-----------.com/albums/g91/subford/Transmission/1993C103.gif
I didn't know which was the C103 plug so I just assumed since you posted that first diagram that it could be tapped there...
 
  #49  
Old 08-07-2007, 12:09 PM
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Originally Posted by Skandocious
I didn't know which was the C103 plug so I just assumed since you posted that first diagram that it could be tapped there...
I did not know why he was looking at the computer plug either in that post but I was trying to get him to break the wire at C103 instead.
The Computer plug diagram was to show him that the wire was there that he could not find.
The reason he could not find it was he was looking for the wrong wire color.
I miss called the wire (P/Y) Pink/Yellow and the wire color was Purple/Yellow. Pink/Yellow would have been (PK/Y).
 
  #50  
Old 08-07-2007, 03:15 PM
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Gotcha. I'll have a look for that C103 plug tonight. Thanks Bill.
 
  #51  
Old 08-07-2007, 10:21 PM
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Heyyyyyyyyyy everyone wait a few here. I did this with my truck a while back. Let me explain a few things....

First off... yes its possible. I did this to mine. I've got a 3 position rocker. Up position is locked up, middle is normal computer control, and the bottom is unlocked completely.

But there's a problem with doing this. If your computer tells the torque converter to lockup at a certain speed.... and doesn't notice an RPM drop in about 3 cycles... it will throw the transmission into "limp mode" and cause hard shifts. It will go away after about 50 or 60 miles, as long as it doesn't notice any more errors. Just be cautious when doing this. I've heard from a few people that allowing the torque converter to slip for longer than normal will cause the fluid to heat up and eventually burn up the converter, but I question that rumor because of the simple fact that any Dodge or Chevy tranny, or even newer 4R70W equipped Fords, don't have the TC lockup until after it is in Overdrive. So you're on your own here!
 
  #52  
Old 08-07-2007, 11:38 PM
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Chad what do you use this for?
 
  #53  
Old 08-08-2007, 06:34 AM
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Whenever the original transmission in my truck went bad, it was doing some extremely wierd shift combinations. For instance, it would make it halfway through first, lockup the converter, and then slam into second. In the meantime, I was working on my Ranger, and my F-1 had to last me about another week. So I installed that to make things a little easier and less annoying on me!
 
  #54  
Old 02-05-2008, 01:50 AM
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Thought I would update on the Torque converter clutch solenoid switch I installed back in june.
I really like fact that when cruising around town that I do not get the annoying 2nd to 3 shift with TCC lockup because 2 to 3 fells like 2 to 4 when running with the factory program.

Now all I need to do is install a updated valve Body but college students tend not to have a lot of spending money.
 
  #55  
Old 05-02-2008, 09:10 PM
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dose this happen on the 88 as well
 
  #56  
Old 05-04-2008, 07:26 AM
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Originally Posted by chaosforge View Post
dose this happen on the 88 as well
No it does not.

In 1988 they only had the C6 and AOD transmissions and they were not computer controlled.
 
  #57  
Old 05-17-2008, 05:03 PM
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Now when the computer allows ground to the TQ Converter, does it monitor engine RPM to signal it has been done, and if the preset parameters arent matching does it send a fault code, indicating a bad torque converter clutch, or malfuntioning TQ Converter?
 
  #58  
Old 05-17-2008, 05:22 PM
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That is correct Squiggy. If the RPM's don't drop within about 5-7 seconds when the computer commands TC lockup, it will see a fault and shift hard.
 
  #59  
Old 05-17-2008, 08:01 PM
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Thats what I thought, and I dont think that type of switch inside the cab is a good selling point cause 2/3 of people dont even know or can imagine what is going on and think the vehicle has been modified beyond the scope of their knowledge. Not only that a Check Engine light on all the time that needs to be reset at resale time doesnt make sense. I doubt it will make anything but worse MPG and we all know its time for a change.
 
  #60  
Old 03-11-2011, 06:52 PM
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Just wanted to add theis to the read....

https://www.ford-trucks.com/forums/9...d-shutter.html
 

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