New answers tagged strange-sounds
I'm thinking the issue is probably with the torque rod (on some cars called a dog bone) which keeps the engine/transmission in check during acceleration/deceleration. At least one end of the "dog bone" has a hard rubber piece which can wear out over time. Depending on how worn out it is, the noise will could be louder or not. You would probably notice it ...
If you are going to keep hold of your A3, then a visit to the Ross-Tech.com web site might be useful to you. Not only can you obtain a VAG diagnpostic system to check your car, but they also have a Wiki on A3's.
I've got two strong suspicions. First is the pinion angle Paulster2 calls out - it's common with a shackle lift or SOA lift that the axle gets rolled so the rear driveshaft won't need replacing (too short with the lift). That's hellish on u-joints. if the transfer case end doesn't start with a CV joint, you simply cannot get away with an ordinary u-joint at ...
I think there are a lot of things going on here, so I'm not sure there's a "right" answer (for others who visit this thread). For my particular case, I think it ended up being the following things: Axle bearing going bad (it finally completely destroyed itself on a trail) Wheel noise (perhaps imbalanced, maybe overinflated, etc.) Other things I've yet to ...
My bet is... the clutch disk (the friction part) happens to vibrate at a frequency that coincides with that particular engine RPM, and is barely free enough to vibrate with the clutch disengaged. If I'm correct, it's nothing to worry about - only an annoyance, and shouldn't shorten the life of the clutch.
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