Originally Posted by OrangeFurious

I've noticed my 4.8 has developed a bit of a heartbeat. It's inconsistent, but there's a rhythmic, or slow pulsing vibration coming from the drivetrain. I can feel it in the steering wheel at stop lights, and if I let off the break the car will inch forward in time to the pulse.

Any thoughts? It's weird but I'm seeing no symptoms of other problems.