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Car shifts extremely early, converer won't lock up, only when compressor is on

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Old 08-08-2006, 11:29 AM
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Originally Posted by blkZ28spt
It's the strangest thing. It had been doing this from time to time in the past but I never made the connection until recently. Virtually anytime I have the compressor on the transmission shifts up at abnormally low rpm and once the converter is locked (in either D or OD) it will not unlock, no matter how much gas I give it.

Any ideas?
yeah.. I've experienced this too! Apart from the lazy 2 - 3rd shift with AC on..
Old 10-11-2006, 11:27 AM
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mine does something similar after going from 2.73 to 4.10 gears.

With the stock tune it shifts ok but speedo is way off, guy tuning the car changed the gear ratio in ls1 edit and after that it goes through the gears and locks up in 4th at 30mph(w/o any other changes) tried adjusting the shift mph and it always did this same thing
Old 10-18-2006, 10:09 PM
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you have misfire codes that is what is causing this i pulled my hair out trying to figure this out go into your tune and turn of the misfire codes
Old 04-01-2007, 10:32 AM
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Sorry, back from the dead...... So its in the tune? Same problems here after MS3 install. Tuner didnt want to dyno tune till I got my "Broken" trans. fixed.




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