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Discussion Starter #1
Ok look at my sig mods. My car under WOT will shift firm and crisp but at the top end it feels like the converter is locking and unlocking. Like if i have it in 2nd gear at 2,000rpm then go WOT it will feel loose, then locks, then unlocks at about 5,000rpm. Its hard to know whats going on and what i need to do to fix it.
 

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sounds like the converter is locked/commanded to be locked in second.
When the 2-3 shift comes up, the converter has to unlock to complete the shift.

basicly that is what it's supposed/has to do...

If this feels different than before your car was tuned, it's likely due to the fact that the factory programming DIDN'T lock the converter in second gear <---common
 

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Sounds like lock-up clutch is slipping to go along with the shuttering you said you were getting from it in another thread.....
 
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