I took my car into the dealership for the pop tink noise. Told the mechanic it is usually the halfshafts. I have read this several times on SVT Performance. Well I guess he felt he new more than hundreds of Cobra owners. He tells me my driveshaft is whats making the noise. I don't argue sure put in a new driveshaft. That is exactly what he did I then am asked to test drive it I pull away get 10 ft stop and get out. The mechanic says whats wrong I said its still making the noise. He looks at me and said I don't know what could be making the noise. I repeat myself "I told you it was the halfshafts". He walks over to the parts counter and orders a halfshaft and says well put it in and see if it stops the noise. He didn't even want to look at the halfshaft just ordered a new one. On a positive note I always had a slight vibe at around 80 mph its gone now. Car rides smooth as glass. I guess no one likes to be told how to do there job but I was trying to be helpful. It is a really excellent service dept though they always address my problems and never give me any grief.