sapper_mac

I have only had my 2003 Cobra for about 5 months and it has about 33,000 miles on it. It was a welcome home gift from my wife after returning from Iraq. The problems with it are; at about 3,400 RPM there is a vibraton and audible sound comming from the driveline. I have had it to a trans shop to see if that was the problem, but to no avail they said all was good. I then took it to the ford dealership and told them what the problem was. They lookedat me all crazy and said they could'nt help because they dont take cars that high in RPM. They also looked at me with the look of "what do you think you have, a fast car", very annoying. The second problem is the supercharger pulley is making a squeeking sound, very loud. I pulled the cover off and took a look, but could not find anything wrong with it, the pulley itself is not stock, but a smaller one that i meqasured out to be 3.10in and no name on the outside of it. Could this just be the belt needing to be replaced or is there more wrong than i can see? Any help would be appreciated.

Hicompression

The driveline vibration is probably due to your need to index the driveshaft. Unbolt the driveshaft from the rear differential. Turn it 90 degrees and bolt it back up. A lot of driveline vibes on these cars are due to work being performed on the differential and after the work was performed they didn't line the driveshaft back up to where it should've gone originally.

The pulley squeek is from an idler pulley. This is common. The bearings go out all the time. You need to replace all your idler pulleys with aftermarket pulleys. Motoblue, Billetflow, Reichard Racing or Metco makes them.

RR03Cobra

I have had two of my stock idler pullies to start sqealing and squeaking!! I replaced all of them with the Metco idlers.