I picked up a "ping" that seemed to be in the head. It really really seems to be in the head. It started suddenly when the engine shifted off of overdrive when going up a hill on the interstate. I just replaced all of the VLAs, the old ones weren't in good shape, all of the VLAs on the passenger side were hammered. I thought that I had found my problem. I need to idle a little more just incase I didn't get them primed all the way but...I think something else is dun busted. I can't hardly diagnose anything, I can just take it all apart and put it back together again. Any next thoughts? Thanks