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Torque converter

Tiny
LJF
  • MEMBER
  • 1997 FORD ESCORT
Four cylinder two wheel drive automatic 130,000 miles.

I discovered the other day that my torque converter was no longer locking up. Can you tell me what might be causing the problem and where it is located? Thank you.
Sunday, May 4th, 2008 AT 11:00 AM

10 Replies

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
The PCM receives a signal from the brake pedal position switch called also BOO switch. Torque converter clutch will disengage when brake is applied faulty switch will effect TCC operation. Also, check the TCC solenoid.
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Monday, May 5th, 2008 AT 8:34 PM
Tiny
LJF
  • MEMBER
  • 14 POSTS
Thanks for the reply. Is this switch located behind the brake pedal and independent of the brake light switch?
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Monday, May 5th, 2008 AT 8:51 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
It is a part of the brake switch located on to of the brake pedal.if you have a scanner you can check it by stepping on the brakes while watch data information. you should see it switching from off to on and so on.


https://www.2carpros.com/forum/automotive_pictures/99387_escort97_1.jpg

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Monday, May 5th, 2008 AT 9:09 PM
Tiny
FRUGALGUY
  • MEMBER
  • 5 POSTS
So where is the TCC solenoid?
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Tuesday, May 6th, 2008 AT 9:07 AM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
On the 1997 models four solenoid valves are located on the valve body.
Solenoid valve actuate shifting and torque converter lock up by switching oil flow through passages in the valve body.
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Tuesday, May 6th, 2008 AT 6:36 PM
Tiny
LJF
  • MEMBER
  • 14 POSTS
I believe I found the problem. I discovered my brake lights do not work. By looking at the wiring diagram, either the brake switch is bad or I blew a fuse.
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Tuesday, May 6th, 2008 AT 8:05 PM
Tiny
BMRFIXIT
  • MECHANIC
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Very good.
Keep us updated.
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Tuesday, May 6th, 2008 AT 8:36 PM
Tiny
LJF
  • MEMBER
  • 14 POSTS
Go figure this one out. I removed the brake switch and found it to be okay. I reinstalled it and still no stop lights. Held the switch in the on position and removed the tail light assemblies. I found the bulb contacts to be corroded. Cleaned them and now I have got stop lights. I took the car for a drive and torque converter locks up again.
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Friday, May 9th, 2008 AT 9:53 AM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Solenoid is in at the transmission valve body.
You need to remove transmission oil pan to gain access.
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Friday, May 9th, 2008 AT 5:51 PM
Tiny
LJF
  • MEMBER
  • 14 POSTS
Transmission seems to work okay now. Thanks for the help.
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Saturday, May 10th, 2008 AT 12:10 PM

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