I've been noticing a whining noise from what sounds like the turbo. This usually happens between 3k-4k RPM when I'm just starting to give it a bit more gas. As I press the accelarator harder the noise changes pitch, and if I give it enough gas the noise goes away, but as soon as I let of the gas again the noise comes back again. I heard a whining noise while driving so I stoped to check it out. I was able to pin point the source coming from under the vehicle around the transfer case (I Did it make the same sound while in drive, but held still with the brakes? It sounds like some crazy transmission fluid pump whine possibly.
a little, but nothing compared to the case noise, thats why im at a loss im a a-grade mechanic and it just agrivates me. Bmw said it was a normal noise My theory is that all the excess drivetrain slack comes to a head in th transfercase causing the bang when the clutch is let out even a tad bit fast...
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