Have you done any research? The website for your program should state somewhere (although it may be hard to find) how competitive transferring into MechE is. This is something you should certainly be researching on your own. Fortunately, engineering majors coming out of all kinds of schools can...
OP, it's substantially easier to transfer to a good college from a community college or less prestigious institution than it is to enter as a freshmen. This is, however, contingent on the program you wish to transfer into. Some programs are nearly impossible to transfer into because they tend to...