Ok, so, they replaced the AAM front pinion seal that was seeping(again), they could not find the knocking noise sound etc.... picked truck up, while driving home I could hear the knocking, clanking noise but on top of that I am now experiencing a vibration at 60 65 70 etc...high speed vibration....took it back, took the shop foreman and service manager for a drive, they felt the vibration/noise and they now heard the clunking/knocking noise I was talking about, asked them to put it on the rack and run it in 4wd..... Transfercase was clanking like a blown rat motor......T-case shot to hell!!
The service Manager replaced the transfercase and that noise has been subdued.
I still have the vibration at "high" speeds. I have had 5 R&P's in that frickin front end and 3 in the rear. I do NOT drive stupid or abuse my truck in anyway. seems like every time they replace the pinion seal, something else goes wrong. the vibration was not there before they replaced pinion seal...... and the "beat" goes on!!!!!!!!!!!!
My name is Ram and I have a full tank but I spend most of my life at the dealer shop!!
Made another appt with dealer to hopefully settle vibration issue.