Quote:
Originally Posted by shiv.nandak
I have experienced this before, i bet your rear wheels are bent/not completely straight (probably slightly bent on the inside). Have all your wheels checked for bends and road force balanced just in case 
Edit: Didn't realize that you tried a different set of wheels. Ignore my suggestion. |
(not an M3/4 but bear with me) i had the same issue on my wifes' e46 320D Touring car. Up a hill and while under heavy acceleration we experienced a vibration and at times even what felt like wheel hop. It will also make a hum sound at high speed. But it would not do any of those while down a slope or when the car had ease on accelerating. it turned out be the drive shaft heavily out of balanced and the center support bearing. What still remains is a little hum while on high speeds but barely noticeable.