Drive line vibration

Stay at the speed limit, especially if you don't know what the source of the problem is. What have you done to try to diagnose the problem so we can eliminate it ? Vibration in front or rear or whole car ? Cruising, accelerating, decelerating. Problem before clutch change ? Put car up on jack stands with stands on rear under the axle housing to maintain driveshaft angle. Put wheel chocks on both front tires. Have some one in the car to run through the gears and have brake pedal ready. Report back to us.