If I am accelerating quickly, sometimes the car doesn't want to do a hard shift into 3rd gear. It's almost like the shifter gets blocked. It's the only gear that does this to me. This isn't my first manual Mustang, but I never had problems with my older one. Could it be because the car is so new, the gear box needs to loosen up a bit? I'm worried this is gonna screw me at the track. I can do a smooth shift into 3rd every time under normal acceleration, but if I'm racing through the gears, I get this jam in 3rd almost every time. Any ideas?