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Why would a converter not lock on the dyno at WOT?

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Old 11-18-2004, 10:54 PM
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Default Why would a converter not lock on the dyno at WOT?

Had a stage 3 trans installed recently and retuned the car because of a ls6 intake. Anyway, the converter was removed and sent out to PI to be flushed and cut. After installing it in the new trans, the tuner said that he couldn't get it to lock at WOT on the dyno. This was with LS1 edit tuning. What could be wrong/is this normal?
Old 11-19-2004, 05:28 PM
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Someone must know, I'd like to at least find out before I drive the car anymore. I've only put about 60 miles on it since I picked it up and don't want to take a chance until I know what's going on.
Old 11-19-2004, 08:32 PM
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From the factory the torque converter does not lock at WOT. You can change the tables in the computer or add a switch to lock it up.

Gary
Old 11-19-2004, 10:57 PM
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Misfires will make it either unlock periodically or
not lock at all even if programmed to lock up.
Old 11-20-2004, 10:16 AM
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The clutch could be burnt and not fully engaging. There is one easy way to tell. There is a reason that converters come in a pretty pink and purple type colors. Take off the small round plate (less than 3/4") on the back of the bell housing. Find a way to get light inside so that you can see the back of the converter. See if it is still one solid color. If the clutch is burnt, like from locking it up, it will burn a black ring into the back of the converter.

Last edited by 1jfuddle; 08-29-2005 at 10:07 PM.
Old 11-20-2004, 10:48 AM
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I don't believe the converter is bad, I'm sure they would of told me. They send it to Precision Industries to be checked out. I'm sure if there was something wrong I would of been told but I'll call them Monday just to make sure.
It isn't a big deal about dyno numbers, I just want to make sure I don't end up damaging a new trans.




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