2018 PP! Manual - have both the tick and rattle which started after 500 miles. Installed a MGW shifter / H pipes and it drives like a totally different car. No more 3rd gear lockout. Next mod is the JLT COI / tune and removing the sound tube. The sound tube does not help (one of the techs...
Finally had the MGW shifter installed and H pipes. Drives like a different car. The H pipes sound great and i can barely notice the 2k rattle, so I am feeling much better about the car now. I have to listen hard to hear the rattle and do not think about it anymore which is hard to believe as it...
2018 Mustang GT Performance Pack manual - exact same issues / experience. I did the same thing changing the oil (went with a thicker 0/40 / Ceratec etc - exactly the same. and it is maddening. Your description is excellent and there are so many of us who have this exact same problem as this...