I just purchased a 2004 Mazda3 S 4 door with 5 speed that is still under original factory warranty. I have noticed that when shifting into 3rd that it feels like I have to force the shifter and it kinda has a grind (up from 2nd or down from 4th). If I let the RPMs drop and gently push lever into 3rd, it goes fine. Do the 3s have a problem with syncros or shifter linkage adjustment, and id this something the dealer should repair under warranty? Thanks