Lately I've noticed it has gotten hard to get into 3rd and 4th gear. There is no grinding, but you need to be patient and use some pressure before it will go into gear. It's fine when cold, but after a half mile or so begins. Also, I only notice the problem when upshifting. Downshifts are still smooth. I changed the transmission fluid with fresh Honda MTF and no difference. Clutch fluid is at an appropriate level with no leaks. I am wondering if this is a sign of a bad pressure plate and clutch that is starting to go? Any other ideas?