jiankzha

My 2010 CVT A4 vibrates pretty significantly when driving near 40km/h @1100 RPM, strangely the vibration goes away if you accelerate fast (above 1100 RPM), but the vibration comes back if you keep your speed steady around 40. There is no such issue if you are stationary and rev the engine around 1100RPM.
The vibration can be heard in the cabin and it makes a Da Da Da Da noise and can be felt through the gear shifter.
The car can also be quite shaky when going into reverse, it was actually fine and a common issue for this car but if you reverse uphill the car is just reluctant to go, you have to give it a lot of gas.

The car has 11K kms

Can someone tell me if this is a Multitronic issue or maybe engine and tranny mount?
Huge thanks

Dexter_A4_2.0_tdi

Hello,

I have the 2010 B8 2.0tdi and have experienced the same issue. Audi checked everything and could not find anything wrong.
Let me know if you manage to solve it.

Dexter_A4_2.0_tdi

Snap, 2008 model - I thing 2008 - 2012 are more or less the same hardware...

dreadlocks

rotate your tires..

Is it speed dependent or engine load dependent? If it only happens around 40km/h its likely something on the drivetrain (tires/brakes/axles/suspension/etc), if it happens in all gears around 1100rpm regardless of speed it'll be something related to engine (fueling/mounts/etc)

Dexter_A4_2.0_tdi

It is a rather funny phenomenon. If you accelerate fast, no issue. If you gently accelerate, no issue. It is when you accelerate in between. This is constant in S mode and by selecting M. Almost like an unbalanced drive shaft (which it is not). Done all the obvious, swop tyres etc.

Suspension is in excellent shape - shocks is all good.