HELP! Code 39: torque converter clutch error, whats it mean? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-31-2006, 07:46 AM   #1
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Default HELP! Code 39: torque converter clutch error, whats it mean?

Hello all,
I am very close to purchasing a pretty nice 1989 Bonneville. I own an AutoXray code reader that will read both OBD I & II equipped cars. When I checked the car out, I asked the owner if he would mind if I scan it for trouble codes. Only one came up: "torque converter clutch error 39"

I guess my question is what exactly does this mean? When I drove the car, I didn't notice any slipping, but then again I've never driven an 89 Bonneville, so I had nothing to compare to as normal. Does this code spell major trouble? Should I avoid buying this car?

Thanks in advance!
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Old 03-31-2006, 09:56 AM   #2
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I had that code come up on me also with my car. The engine light came on, I got the code checked, and it was code 39. But then never came back, and drove the car for 2 years with no trans problems. Still driving the car now.

SO it may or may not indicate a big problem.
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Old 03-31-2006, 01:18 PM   #3
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A code 39 has to do with an On off error revolving around the control of the TCC solenoid... It may have stuck on or refused to turn on to apply the TCC at some point... Blank the puter let it relearn and see if the code ever comes back again..

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Old 03-31-2006, 06:07 PM   #4
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I have the same thing on mine. It resets and then when you drive it and recheck it is there.
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Old 04-04-2006, 07:55 AM   #5
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So if the car is a good deal, should I buy it despite this code, or plan on expensive repairs?
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Old 04-04-2006, 10:43 AM   #6
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Blank the code...drive it again and see if the code comes back like mentioned.

From there, it'* your game.
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Old 04-04-2006, 02:26 PM   #7
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Default Not an expensive repair

I replaced the TCC on my wife'* van several weeks ago. It cost $42.00 and about 1 1/2 hours of my time. There is a cover on the side of the transmission with about a dozen bolts. Pull that cover off and the TCC is held on by a torx screw w/ some wires...easy fix....new gasket and you are done. If you're not good at turning a wrench, then the repair is $150-$300 or so.

If your TCC is bad you'll know.....it'll buck, kick in and out while driving in the 45-55 mph range. IF it gets stuck while idling it will kick and shut the engine off. It'll feel just like a manual transmission without the clutch applied. This basically is what the TCC is....a clutch for an automatic transmission.
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