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A few months ago my Shelby started making this rattle sound. I’ve owned it since new and it has 24k miles. I recorded it with a remote mic in the engine bay to get a better recording. I could really use your help if anyone has come across this. Most prevalent around 2k rpm or so. Has a pulley, tune, frpp tb, and resonator delete air tube. I took it in and they think it’s piston slap, they cut the oil filter open and there are no metal particles. They said, don’t worry about it and get used to the new sound. Video -> https://youtu.be/b9qG5NgR6To thanks in advance
I purchased a 2013 GT500 new out of state and drove it 1600mi. home. Varied the rpm like the manual advised, drove under 4k RPM first 200mi. Never used LC once. (SVT PKG + TRACK PACK) Ok, history out of the way - I hadn't noticed before but I do now, the car sounds flawless when cold and all the way up to operating temps. Just "after" it gets up to temp it starts this funny whine/moan sound between 900-3500 rpm. Most noticeably during deceleration and sounds like it is definitely front of the car. "Rrreeeeeeeerrrrr" It goes with the RPM of the motor, in gear or out of gear makes no difference so not a transmission issue. The noise gets louder the hotter the motor gets. There is one interesting bit of info, it seems that the noise is much less once you are stopped or just about stopped. In other words you can take it out of gear and be rolling at say 8 mph and rev it a little and it'd loud, around 1mph or stopped and rev it and a 75% reduction in the noise. You can also park the car for 5 minutes just after driving for hours and it will go away then once heat gets back to whatever it is the sound returns. I have an audio clip that I may upload to youtube later. No noticeable power difference so just wondering, is this just how the 13's sound? If this is normal then great, i'll just accept that and move on but it just sounds wrong. Taken it in twice now, they replaced the usual suspects - two pulleys, and the alternator, zero change. Tech said that the SVT Hotline told them "Yeah some of the trinity motors just have that 'zipper' sound from 1-3k, it'll go away over time". Sorry but WTF does zipper sound mean? And after 2350mi it's still doing it. Anyone else experience this? Thanks in advance for any insight into this issue. I simply love this car to death and it sucks when something like this messes with the experience.