2008 E93 M3 — rear end shakes/hops on decel, goes away with clutch in. Driveline issue?
I’m trying to track down a pretty weird vibration on my 2008 E93 M3.
The rear of the car shakes/hops when I let off the throttle, especially while coasting in gear. I can feel the vibration through the rear of the car and the center console.
The weird part is that as soon as I push the clutch in, the vibration completely goes away, even though the car is still rolling at the same speed. It also started becoming noticeable lightly under acceleration, although it’s much worse when coming off throttle.
I originally suspected the rear axle because it had a ton of play, but the axle has now been replaced and the issue is still there.
What would you guys check next? I’m thinking driveshaft/CSB, guibo, differential mounts/bushings, or possibly something with the rear subframe.
Has anyone had an E9x M3 do something similar?