hi , i got a problem with my 2010 chevy cobalt , i suspect the clutch to be the problem but i am not 100% sure , when i am driving on highway and accelerate the rpm goes up about a 1000 rpm then start to go down till it get to is normal rpm vs. speed and get back to normal . that only happen from the 2 to the 5 th gear . after let say 30 miles of drive it get better and finally stop doing it at all . does anyone had something simmilar or know what it could be . I already check the clutch fluid . thanks for your help !