Folks,

I’d appreciate your help identifying this rotational noise. It’s easier to hear with headphones, but you can here on laptop speakers if you turn them up.


Car: 997.22 TT, PDK 2010

· 50k miles

· Air modes, tune, DSC (No other suspension mods. Dampers are orig.)

· Major service, including PDK oil pan, completed approx.: 12 months ago

· RF/LF Axels replaced about six months ago

· Brake job 12 months ago.

· All work done by an excellent, Porsche experienced shop, who works on all my cars

· MPS4s- plenty of tread. No issues.

Replicating the Noise:

· Car must be in forward gear.

· Much easier to hear while not under load

· Seems to be worse while turning the steering wheel left, even slightly, loading up the right rear.

· Dampers lower pad are orig. Driver’s side looks ok. Rear passenger side is falling apart

· Noise sounds rotational. Easy to replicate.

Diagnostic steps to date (as far as I know)

· Suspension checked while on a lift. No play

· Manually spin the wheals. No noise.Listened with a stethascope

· Place load on suspension with Jack. No noise

· Heat shields and dust shields seem to be in order. RR-slight scoring on inside of rotor like there was a rock behind the dust shield.

Currently planned next steps…

· Start taking stuff apart, starting with the RR wheel

Wheel bearing?

Thanks. Appreciate the help.



Doug

 

Likely a wheel bearing