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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-28-2004, 02:47 PM   #1
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Default code 39

I get a code 39 torque converter circuit??? Anyone have any ideas on this? Car drives fine and seems ok? I also get that quirky Tach jumping around or sometimes it will just lay flat and not move at all.

any suggestions would be appreciated.

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Old 07-28-2004, 10:34 PM   #2
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That code means that your torque converter is not locking up properly.
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Old 07-29-2004, 12:58 AM   #3
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also killing your mpg.

How would the ECM know that the TC isn't "stalling"?


-justin
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Old 07-29-2004, 12:59 AM   #4
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It knows what RPM'* are expected at certain speeds, assuming the TC locks up.
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Old 07-29-2004, 01:25 AM   #5
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I got the same code once but never came back, so I never got the work done on it. I talked to my mechanic and he told me what it was. They won't even touch the trannies, they have a tranny shop that they send people to. The place they send it to I have heard about alot and seem very good.

I think it was a solenoid or something that needs to be changed, said it was about 200-300$ for the repair.

Just curious since we are on the subject. What rpms is the car running at regular cruising speed.

I know that my trans goes into OD at 80km/h. If I am going up a hill and have to give it more gas I can get it to drop to about 2,000rpms at about 100km/h.
Sometimes I find that you have to et off the gas for it to go into lockup. I still think it is not getting into full lockup.

Don't wanna steal your thread but figured you may be having the same.
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Old 07-29-2004, 10:06 AM   #6
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Default Lock up

Mine does the same it does seem to lock up I am around 2k at 100km. Yesterday it did something weird I went from a dead stop to pass someone and it seemed like it would not kick out of 1st and reved to the red line before it finally let go. I also heard today that it is not hard to change the solanoid about a 30 dollar part and is easy to get to on the tranny but not positive on this.

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