2013 mustang gt premium. 5.0
Had a weird .. I wouldn’t say “clunking” but idk how to explain the sound.. but it happens when driving/ slowing down. 3 different people told us it was a driveshaft. Ordered a driveshaft. Installed it tonight/ but still the same sound. But the new driveshaft added hellacious vibration at around 120-130 mph. Didn’t have that before. Any ideas ?