Two problems related to driveshaft have been reported for the 1998 Ford Mustang. The most recently reported issues are listed below.
No summary provided by consumer.
When vehicle is turned on, it would make strange harmonic resonance noise, causing vehicle to vibrate & shake. Only happens when vehicle is running. Noise would build up. Problem cannot be duplicated. Vehicle could be idling & noise would also appear. Mechanic cannot solve problem. Also has a bad drive train & rear end.