E90 vibrating and thumping after 40mph

[Bsavage93]

I've been told multiple things regarding this problem . The first thing people say is rims unbalanced or tires bad . I jacked the rear of the car up , took the wheels off and it still happened after 40 mph and faster even to 100 . Next is the wheel bearings but there is no whine to the wheels or when I turn the car it dont get worst whatever side I'm turning to . So I ruled the wheels and tires out . When I jacked the car up and took the wheels and dtc the differential shook after 40 mph . I thought forsure it was the diff bushing proceeded to switch all 3 to no avail. The guibo and center support bearing is in good shape . All the bushings on the subframe look good . Has anybody heard of a diff shaking at speeds greater that 35 mph . There is no grinding or whining sound from the diff so it throwing me for a loop . The only thing I can think of is the diff is bad . Any ideas or help or even input would be greatly appreciated.


2007 bmw 335i sedan 145k miles