What did you get replaced? What did the issue end up being?

Right rear bearing... The mechanic showed me the bearing and it had some pits in it which was causing the terrible sound.

Before the fix, I would be afraid of going above 70, because the faster i drove, the louder it got and it sounded scary. Now i can go 80, put it in neutral and it will be completely quiet.

Glad to hear

how much did this end up costing you?
I think I might have the same problem.

I had a bad wheel bearing replaced at a dealership last December. Total bill was $760 which included an alignment.

Wow at the dealership. Not that bad w/ alignment.
Thanks for the info!

Jacabean;

Last summer I drove my 2000S on a 300 drive and for the first time noticed a lot of vibration above 75-80mph that had never been there before.

At my destination, the car had an awful odor that I could not place....but the car was running beautifully and all fluids were intact and at the correct levels. On the subequent drives that weekend and on the trip home, the odor was no longer noticable.

A month after I returned home, I had my car on a lift to change gear oil and saw that I had three torn CV boots and grease everywhere, including the exhaust! I changed all four boots on the car last fall.

Last week was the first occasion to have the car out on the interstate.....no more vibrations noted at speed.

Other disclosure: I do have 4 new tires on the car (no alignment done yet). The old tires had no noticible uneven wear.

Last but not least, spend some time inspecting the inside of the wheel and anywhere it might be rubbing.

My right rear was doing a "whomp-whomp" and it turned out to be the cheap wheel weight that the tire tech attached to the inside of the edge of the wheel. The wheel weight would slightly rub on the shock tower while cornering. All I had to do was to have the wheel rebalanced using the glue on weights that attach in the center of the wheel.

Depending on independant mechanic. My mechanic who only works on Porsche and has a 5 star rating on yelp replaced my right read bearing for about $450 where other local Porsche mechanics were charging $600-750

I ended up bringing it to HRG in lake forest.
They did a great job for around that price.
Now she rides smooth.
Thanks for the info guys!
No more whoomp whoomp noise.