m6 f12 test drive slight vibration?

[ArnyT]

Hi Gents,
Back again with more tricky questions, So I went for a drive in a SM blue 2015 m6 that's been traded in at Audi westrand that looks promising on surface value, and the one thing I noted is that under full throttle in 3rd gear, there is like a vibration that feeds into the steering wheel that becomes more and more apparent as the revs climb.

No vibration under normal driving or even during hard pulls in 1st and 2nd.

İ suspect, based on my impressive car CV, it may be:
1. Some imbalance or worn rubber couplings / Centre bearing on propshaft
2. Tyres/rim imbalance. ( although the car cruises fine at 120kmh with no vibration noted?)
3.?? diff.. engine mountings maybe..

Any thoughts welcome.. car is out if plan and if a deal does materialize would like for them to get to the bottom of that issue at a minimum.

 

[AshG108]

Hi Gents,
Back again with more tricky questions, So I went for a drive in a SM blue 2015 m6 that's been traded in at Audi westrand that looks promising on surface value, and the one thing I noted is that under full throttle in 3rd gear, there is like a vibration that feeds into the steering wheel that becomes more and more apparent as the revs climb.

No vibration under normal driving or even during hard pulls in 1st and 2nd.

İ suspect, based on my impressive car CV, it may be:
1. Some imbalance or worn rubber couplings / Centre bearing on propshaft
2. Tyres/rim imbalance. ( although the car cruises fine at 120kmh with no vibration noted?)
3.?? diff.. engine mountings maybe..

Any thoughts welcome.. car is out if plan and if a deal does materialize would like for them to get to the bottom of that issue at a minimum.

That sounds exactly like Balancing and/or inside rime slight buckle...this was the same things that was the cause for me when mine had the exact same issue.

 

[ArnyT]

That sounds exactly like Balancing and/or inside rime slight buckle...this was the same things that was the cause for me when mine had the exact same issue.

that would be a very welcome problem if that is the case.. coz to face a worn out, on its way out m6 diff out of plan, I can only imagine what that will cost

 

[AshG108]

that would be a very welcome problem if that is the case.. coz to face a worn out, on its way out m6 diff out of plan, I can only imagine what that will cost

So true, I will hope it is that rather than the diff bud