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4L60E lockup/4th shift all at once?

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Old 03-28-2011, 12:10 AM
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Default 4L60E lockup/4th shift all at once?

I just purchased a 97 WS6 with a 4L60E. I am pretty sure that every time I accelerate normally from a dead stop it is shifting into 4th and locking up at the same time. The converter is definitely locking because when I do the light application on the brake pedal once its done all it's shifting, the rpm rises slightly and drops again as soon as I let off the pedal.

It's very annoying because it's a huge drop when it shifts from 3rd to 4th. It gives quite a lurch. I searched a bunch here, found lots of lockup threads but none that seem to address this. Any suggestions?

I'm new to Firebirds but I've owned a number of LT1 Impala SS/Roadmasters and never run into this before.

Thanks.
Old 03-29-2011, 11:22 PM
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Anyone?
Old 03-29-2011, 11:59 PM
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I dont know about lt1 or anything but cant you have it tuned to where the converter locks up later..
Old 03-30-2011, 12:37 AM
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My car does the same thing, not sure if its normal or not
Old 03-30-2011, 12:41 AM
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Just needs to have the shift point or converter lockup speed changed in the tune is all.




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