in my s10 blazer when im cruising around 55-60 in overdrive it seems to kick from 2k then up to 2.5.....then back down to 2....it keeps kicking out of overdrive, but not into passing gear. Its like when u go up a hill.....it doesnt kick into passing, it just gives a few more rpms.......but mine does it all the time. what do you guys think? trans flush? maybe some of that seafoam trans tune? keep in mind.......this is my winter beater....we're goin the cheap route here......