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Harmonic imbalance at 100-115 kph

Posted: Mon Nov 18, 2024 4:50 am
by 001JLM
I have a 2014 C7 RS6. It has a weird rump rump rump noise on the highway between 100 and 115 kph. Just had a set of new tyres, wheel alignment and had suspension and driveshaft checked.
Apparently nothing wrong but the noise is still there. Any suggestions?