High RPM @ 62MPH?? Help.
 

I have a 2006 mini hardtop. Some weird has been happening. On the highway when I hit between 61-65 MPH the RPMs go from 3000 to 3800. after i get to 66 MPH they go back down to about 2800-3000. It make trying to maintain a 60-65 MPH speed very difficult. Anyone else have this issue??
Thanks!!