Just got my 03 and my 4th gear grinds when I shift into it about 80% of the time. if im really slow about it , like shift to neutral, wait 2 seconds, and shift, it only happends 40% of the time. it sucks that its the only gear doing it. I talked to the dealer I bought it from and they said I can take it in as soon as my warranty info shows up in my mailbox. they seem like really cool cats so hopefully it wont be a problem. I have a warranty through Toyota Because I bought it from the toyota dealership.