Hey guys
Yeah I got that Highspeed driveline vibration as well from in 6th 5th and sumtimes 4th, I am guessing that it is just resonating at a certern rpm in the drive line, I havn't had a look yet but maybe a rebalence of the driveshaft may fix it. The clunking of first and second is also apparent in my box, nothing to worry about though as once the gearbag warms up the shift quietens dwn abit, trust me its nothin, if you want to hear a noisy gearbox you should hear the one in my truck when it's cold.
Shannon