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Isuzu Trooper Transmission Slipping
Hey guys, I'm new to this and can hopefully get some good info. My 2001 Trooper decided to start slipping between 2nd and 3rd gear with the normal high rpms. I can let off of the gas and then it will kick into gear. It seems to affect all gears after a few miles, stopping and going, then straightens out with a slight slip between 2nd and 3rd from a stop. I have been told to clean the egr valve and tube (done), do a partial fluid change (done). Had codes checked at AZ and got back p1404. Just wondering if the alternator could be causing this issue or is the transmission shot. I just find it puzzling how it works great when cold then gets crazy when warm. Please help!!!!