holminator

Hello,

My car is a 2000S with 23,000 miles on it and my 4 tires were changed when I bought the car at 17,000 miles. 18 inch Pirelli PZero.

The only way I can describe this noise is like a "wup wup wup" which gets faster as the vehicle speed increases.

It seems to be coming from the rear wheel. Also if I open my window I don't hear it as well as when the window is closed.

The noise gets a bit louder and the interval shortens when speed increases. It starts when I reach 30 mph, when I slow down below 30 mph it takes about 2 seconds for the noise to be less noticeable while the interval increases up to no noise. Also there is no vibration in the steering wheel or brake pedal.

Besides the fact that it is speed dependent, whether I accelerate, turn, brake, etc. it does not get affected.

I did jack each rear wheel up and checked if there is any free play and no there is none. No rocks inside the tire treads. When I turn it by hand there is a slight grinding noise on both wheels but more noticeable on the left one as if the rotors are touching the pads.

The other thing that might not be related is I need to pull my handbrake pretty hard if I want to immobilize the car in a hill. Could the handbrake shoes be worn out and touch something? By the way I reinflated my tires recently as the pressure had fell way below normal tire pressure, but my tires do not look worn out at all.

What could be the possible issues?

Wheel bearings, CV joints, warped rotors, bad tire, etc.

Can I potentially make things worse by driving it?

Sorry with all those questions as I know it is very difficult to troubleshoot those issues this way. But I am just hoping somebody went through the exact same problem and has an answer. As I had to rebalance my wheel when a weight came off, I now know exactely how to diagnose the issue now.

Thank you in advance for your help.

:clapping:

<{POST_SNAPBACK}>

When I had this problem on my 02 Boxster S, it was the rear wheel ball bearings.