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[OLD_BMW]

Hey All,

Pardon the generic title haha

I've been restoring a 2006 335i e92 100k miles. Fit new Guibo, Propshaft support bearing, Diff bushings ALL fluids, New bilstein b4 rear shocks and just a month ago put new Michelin Pilot Sport 5 tyres on it with appropriate wheel balancing etc.

After putting around 1k miles into these tyres I started hearing a weird low frequency oscillating vibration from the rear axle. That is not really load dependant, is there past 70mph no matter if you are on the throttle or fully clutched in. below 60-70mph Everything is extremely smooth no abnormal noises/clunks.

More noticeable on some surfaces than others.

Jacked the car up, wheel bearings feel nice and tight, and the wheels spin as they should. Brakes don't seem to stick as they have also been serviced in the past 2 years or so and brake temps are even after a drive.

I'm starting to think it's the tyres? Maybe the colder weather and this tyre compound don't mix?

The sound is like a resonance oscillation like a wheel is out of balance slightly almost. I'm ruling out prop shaft since you can't feel the vibration through the gear lever. Just through your back and noise from the back as well.

Anybody had issues with ps5 tyres like that in colder weather? Any ideas? Should I rebalance the rears? Or can a bad diff cause such vibrations?