hi all! just bought a 90 200 tdi with about 90 k on the clock. there is a clunking noise coming from the rear when you pull away and change gear eratically. however, if you change gear slowly and smoothly with out puttin the power down too quickly there is no noise! any ideas what this could be? i think it may come from the transmission but not sure! also, when i hit about 40 theres a knocking sound coming from the rear that gets faster as i drive faster. any idea what this could be also? and roughly how much will it be to repair? any info wud be much appreciated as i am a bit of a novice! thanks!