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03 deisel duramax trans. problems

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Jan 28, 2009, 3:47 PM

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i have a 2003 chevrolet diesel duramax 6.6 its got 110,000 miles and my service engine light came up it braught up some codes first one is p0700 showing transmission control system malfunction, second is p0735 showing gear 5 ratio incorrect it has done it 2 times and both times i was on the highway going about 65 mph and i went to pass someone and it felt like it downshifted and my rpm went from about 2000 to about 3000 or more so i had to pullover and let it sit for 15-20 minutes and it was fine but like i said it only did it when the tuck shifts into a over-drive i guess can anyone help me to see what caused it and what i might be able to do to fix it. thanx

03 deisel duramax trans. problems

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