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Why would a Chevy have first gear and the engine rev but not try to upshift? |
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Answer
Either you have a vacuum leak on your transmission or the bands on second and third gear are burnt off. Try pulling off the transmission oil pan.(if you do this make sure you have enough Auto Transmission fluid to put back in unless you find a bunch of sludge in the pan. If this is found then the bands are burnt off and the transmission should be replaced.) For a vacuum leak start up the vehicle and open the hood. If you hear a hissing sound then there is a vacuum leak and it usually is down on the transmission itself or right at the carburator.
Answer
you can check the vacum at the modulator with a vacum gauge. if you pull the hose off the modulator & trans fluid comes out them the modulator is bad
First answer by Gasman1202. Last edit by Crewdog. Contributor trust: 97 [recommend contributor]. Question popularity: 80 [recommend question]
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