I have a VAG 1.6TDI 5spd MT octavia. I've often noticed that there is a lot of vibration when moving in 1st gear whenno throttle is added (as in traffic jams or whenever traffic moves really slow). After I add even a bit of throttle, the vibration is gone. Could this be slipping clutch? I was under the impression that in this case the clutch slipping would be most noticeable in higher gears with no throttle, not in 1st?

  • Is the vibration only when engaging the clutch? Or when the clutch if fully engaged? – Pᴀᴜʟsᴛᴇʀ2 Aug 3 at 11:29
  • When engaged and moving only (or starting to move I suppose, but it's on and off, as in, vibrates for a second, then smooth for .5, then vibrates again, feels like clutch is slipping, but I don't suppose that's it because there are no other obvious symptoms (slipping in high gear, burning smell, slipping under fast accelration), only happens when moving with no throttle (and only in 1st gear). – user54884 Aug 3 at 12:04
  • I can't tell from your description exactly, but it sounds like your clutch has "chidder" in it. You might also be lugging your engine, meaning, if the rpms are too low when engaging the clutch, the engine slows down and can cause a vibration. – Pᴀᴜʟsᴛᴇʀ2 Aug 3 at 12:18
  • Yes, I have thought about lugging, but I used to have a weaker (though SDI, non turbo) diesel which didn't have this issue so I thought lugging wasn't an option. – user54884 Aug 3 at 12:39
  • 1
    I wouldn't be so quick to rule out lugging - remember pulling away at essentially idle you aren't getting any appreciable boost from the turbo, so at that point it's not stronger than your old SDI. My experience driving some of the VAG CR diesels has very much been that at low speed you need to drive them much more like a petrol engine and give it slight throttle when pulling away or they lug or even stall. – motosubatsu Aug 3 at 13:17

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