I just replaced the front driver side motor mount, well I guess it'* a tranny mount. It'* kinds perplexing until you realize you need to unbolt the rear mount in order to lift the engine high enough to get the front mount out and the new one back in.
My old mount was completely seperated. The mount consists of to plates with hard rubber in between, with a shackle stud to hold it together if the rubber seperates. Well, mine was completely seperated and the shackle bolt was about to break.
That should reduce popping sounds.