Jaguar Repair Problems? Ask a Jaguar Repairs Expert.
Do you only feel the vibration at 60 mph? Do you feel it in the steering, seat or floor? What year is your X type?
OK I know you stated you had wheel and tires replaced but see if the shop performed a road force balance. I have been seeing lately where new tores may have high road force. This can be caused by the methods tires are stored. Most larger tire shops or dealers will have this type or equipment. The higher the road force the more you will feel a vibration. Let me know. The other possibility is the transfer case or differential. Let me know.