Mine is at the dealer now to have bubbles in the grille surround and under hood panel fixed. Grille surround is being replaced. I think they are repainting the under hood piece.
Anyway, since the warranty is running out this year (2nd owner on 2009 gave me balance of 3 years) I asked them about the tick. Mine used to do it all the time, which was embarrassing at times. Starting in December - colder weather? though it seems counter-intuitive - it now only does it when the car is cold. It's quite loud and gets louder at lower RPMs. If, after a cold start, you wait for the engine to slow down, then put the car into gear, hold the brake and slip the clutch to slow it further, you can really hear it. It disappears at higher RPMs. Or maybe you just can't detect it then.
The folks at the dealer took days to investigate. I'm very lucky to have a dealer I trust. I've worked with the same service manager for years and their mechanics seem quite capable. They said that after further investigation and talking with Chrysler, they'd recommend not tearing down the engine to check for the source. They said they could not find anyone who knows what causes it or how common it is. They want to check other cars like mine - 5.7 6-speed - and see if they do it too. If not, they will go exploring if I want them to to try to find the cause while I still have warranty left.
I expect to be trading for a 392, so probably will ignore it unless there's some magical fix in the LX forum.
Suggestions or other info appreciated.