4r100 Torque converter or solenoid problem - F150online Forums



4r100 Torque converter or solenoid problem

Reply
 
 
  #1  
Old 04-25-2012, 09:46 PM
Member
Thread Starter
 
Join Date: Feb 2011
Posts: 28
4r100 Torque converter or solenoid problem

Hey guys, I have a f150 2002 with a 5.4 and 4r100 (yes im sure), and a week ago my torque converter started getting stock (locked) when i came to a stop making the engine stall (it took a couple of minutes before my engine got warmed up). I checked the codes and got 0740 and 0743 which relate to the tcc solenoid malfunctioning. To make sure the tc wasn't physically stuck y cut the purple wire that signals the solenoid to lock the converter, the truck ran fine and as expected the tcc never locked, so I thought I norrowed it down to the solenoid pack, which i bought (300 bucks ouch) and changed it yesterday. Today again the same thing started happening and the truck is throwing me the same codes, so im a bit frustrated. I don't wanna go ahead and buy a torque converter without knowing the real cause, any ideas of what could it be? I didnt see any melted wires down there but could my long tubes be shorting that wire out randomly in an unseen place? or could my tc be bad?
Reply With Quote
  #2  
Old 04-25-2012, 11:56 PM
Senior Member
 
Join Date: Mar 2000
Location: SE Florida, USA
Posts: 1,565
If the torque converter were bad cutting the wire wouldn't make any difference. Since cutting the wire solved the problem the problem is in the wire or the PCM. If it is the wire the problem is located between the PCM and where you cut the wire.
Reply With Quote
  #3  
Old 04-26-2012, 09:21 AM
Senior Member
 
Join Date: Oct 2002
Location: St. Louis (Out in the woods)
Posts: 5,932
Mark is correct.

Either the PCM's ouput driver is shorting internally to ground or the VT/YE wire to the TCC solenoid is intermittently shorting to ground (which causes the solenoid to energize and apply the TC clutch).

There was nothing wrong with the solenoid pack.
Reply With Quote
  #4  
Old 04-26-2012, 10:38 AM
Member
Thread Starter
 
Join Date: Feb 2011
Posts: 28
Thanx To both,

one other thing, I had an idle issue with my truck also which ended up being a short in the pcm messing up the readings of the tps(now fixed), is the tc solenod cable related or conected somehow to the tps or does it go directly to the pcm?

Last edited by hollenjoe; 04-26-2012 at 11:20 AM.
Reply With Quote
  #5  
Old 04-26-2012, 10:42 PM
Senior Member
 
Join Date: Oct 2002
Location: St. Louis (Out in the woods)
Posts: 5,932
They're both in the same connector to thee PCM (there's only one big one).
Reply With Quote
 
 
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Vanwilder01
2015 - 2016 F-150
31
08-04-2016 04:07 PM
fdegree
2009 - 2014 F-150
14
03-02-2016 10:56 PM
smaring
1997 - 2003 F-150
8
08-01-2015 09:06 PM
cschmelzer
1997 - 2003 F-150
14
07-28-2015 10:12 PM
brokeazztruck
2004 - 2008 F-150
1
07-13-2015 02:59 PM


Thread Tools
Search this Thread

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -4. The time now is 12:58 AM.