dspeaks1165

Thanks Kent, Its ordered. I replaced the broken bracket...no change.I will let the board know if changing the flex disk resolves the annoying vibration noise.

It looks like its the cooling tubes running down the middle of the car... vibrating. One, is missing a "u" bracket. I had to special order.

The flex disk looks like it could use replacing. It will be next, If this noise doesn't disappear with the new brackets. I will post the results.

Thanks JFP ! I was hoping that that was the case. Sounds like a piece of cake. I have friend with a lift I am going to see Friday. I hope its the flex disk....its a really irritating noise.

I will let the board know the outcome.

Cheers!

I appreciate the reply and links. However, I am still trying to make sure that the Guibo is the culprit. Can you tell me how to access the Guibo for inspection.

Do you think I am on the right track?

2002 C4S. Dropped transmission to replace AOS and Clutch. When disconnecting the cardan shaft from the transmission I found the rubber coupling to be cracked in a number of places. When I call the Porsche dealer they could not locate a P/N for just the rubber coupling. I am told it comes as a part of the entire shaft assy at a price of approx $450.00 When I look at the PET parts listing I can find no break down of the part either. The rubber coupling simply bolts to each part with 3 bolts each direction.... No reason I can fathom as to why the part is not listed separately as a wear item. Was hoping someone on here has been down this path before. Search revealed no clues...Thanks, Tom

Thanks for the reply and the link GoldenWarrior! I am still trying to figure out if the Guibo is the problem. How do access the Guibo to inspect it? In your opinion, am I on the right track?

By the way, the noise is not affecting the performance of the car...its running great.

Hi Guys,

I am a new member.

I have been stumped trying locate a vibrating noise (that lasts approx 2-3 seconds) that my Carrerra 4 makes under load @1500-2000 rpm that's driving me nuts! As soon as the rpms get above 2000 rpm it goes away. The best I can describe the noise as the noise you would hear if the was a loose shroud with something, like a driveshaft rubbing against it. I can't produce the noise while standing still, I have to be moving. At first, I thought it was the exhaust, I have since eliminated it as the culprit. The noise comes from under the car (can't tell if its front or back) . I have checked the spark plug covers and the heat shields as well. CVs are good and so are the wheel bearings.

I have looked at every post regarding "noises" on this and every other forum on the net and my best guess is the flex/guibo connecting the cardan shaft. However, I can't find in any of the posts how to go about inspecting the Guibos on the car.

Could somebody help me shed some light please?

I recently changed the transmission mount, engine mounts, new IMS and new RMS.

Thanks in advance for any help.