I just bought a 2003 5 spd, new clutch. I have org. service records from dealer. It has 80k miles on it. Super clean. Love it, not as much as my '95 Tacoma, but love it. My question is that when at highway speed(60-70mph) I get a vibration at 3000 rpm when go up slight grade or steeper. Clutch has a few weeks on the warranty. Is this normal or should I unload it now? HELP!