I just had my cam phasers done, I had a long conversation with the service manager since it was the end of the day and no one was there. He said that every single 3.5 engine will need the cam phasers replaced. I thought that was interesting. He also said the new parts fix the problem. He stated they have only gotten 1 or 2 trucks back that had the new parts. Now maybe that's because the new parts are new. But I found it interesting. I am hoping this is my one and only trip to get them fixed. BTW, it was pretty painless. Left the truck there on Sunday night. Got it back on Thursday evening. He also said it was now easy to get the parts. They have them in stock.