The transmission is REALLY stiff shifting into any of the back three gears (2nd, 4th and 6th). Almost to the point of being unusable. This happened to me once before and I brought it into the dealer under warranty and they fixed it. Does anyone know what would cause this? I fear I am out of warranty now - is this something I can fix? I'm praying this is something that can be adjusted without opening up the gear box.