When on highway with engine warm at around 90-100kmh (~60mph) the rpms keep rising and falling, increasing also the speed but only in quick shots that seem programed (perhaps sensor problem). There are no codes or check engine lights and im keeping my foot on the accelerator steady
Some people tell me to check the throttle body for carbon deposits, or throttle body sensors
Others the transmission speed sensors, but there are 3 of them ? (2 inputs 1 output or something)
I changed the transmission oil pan, gasket, drain plug and drain plug gasket, cleaned the magnets, about a year ago but didn't change any filters (didnt know had to) then added 3.5L new acdelco cvt fluid straight from chevy.
Does anyone know what to do or check I'm hoping I don't have to change the cvt belt or anything.