Grinding from 6th to 5th?
 

So i've noticed that when im at a higher rpm in 6th, and downshift to 5th while using rev match, that it grinds for a split second. But its only 6th to 5th. Not any other gear. Any ideas?

Synchro's. Welcome to the club. Nothing you can do about it. You might change gear lube. But it will come back. If you can't put up with it. Change the tranny. Depending on your mileage and year. The dealer might change the tranny out under warranty.