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Strange Resonance at constant 72-73mph
I have a 2012 6mt Competition Pack E92, which has developed a strange "wowowow" resonance which can be heard -especially on smooth surfaces- at a constant 72-73mph, but only in 6th gear. The same engine speed in 5th, or the same roadspeed in 5th does not cause the sound.
If you close the throttle, the noise goes away.
OK - you could say drive faster or slower and no problem, but there are many speed cameras on some sections of my journey to work and I really do not want to take even longer to get there!
The car has 4500 miles on the clock, and Pilot Sport 2 tyres. Dealer has tested the car and agrees that the noise is there, has changed the gearbox oil and sent a query to BMW tech support.
The tech who came out with me in the car thinks it is an engine fuelling issue, but I am not so sure. I would have thought it would be a gearbox issue.
Has anyone else come across this?
TIA
Tony B
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