Clutch Slipping?
 

Hey everyone, I have a 2007 mazda 3 with 65k. I've noticed that once in a while when I shift into second or first that I get a grinding noise. At first I thought it wass a bad shift, but then today I was going from first to second gear and I got a grinding noise and the RPM's shot up high real quick. Im thinking the clutch is starting to slip. Its wierd though because the clutch still feels strong when pushing it. It dosnt seem like a bad syncho either.I've had syncho problems before and from my expierence the synchro will always grind. I've only had this grinding about three times with about 300 miles of driving. Any ideas? I have the car under warrenty still for a little longer but unless the noise is obvious and happens a lot they arent gonna do anything about it.