1972 dart swinger, 440/727, 3.23 geared clutch type 8 3/4 rear. I just got finished rebuilding the front end and doing the K-H disk swap. Finally got that all done and now noticed i have this pulsating vibration in the driveline somewhere.. Almost like swerving over onto the rumble strips back and forth..not quite that bad but... It had been fine and sits most of the time in the garage so i dont know where this came from all the sudden. I jacked it up and ran it through the gears on the jackstands and it still did it. I crawled under the car and grabbed the drive shaft and shook it and there doesnt seem to be any play in the u-joints..Im stumped. Like i said, its been fine and seemed to just develop out of now where.. any ideas?
