I was talking with a friend today & his daughter bought a 2012 Jeep with the 5.7 Hemi when it was a year old with odometer in the teens. It now has about 80,000 miles, & is starting to have problems running right. Recent oil change had bits of metal in it. They took it in to a Goodyear repair center & had a couple of sensors replaced, but this has not fixed anything, the check engine light is back on. According to my friend, things are pointing to the timing chain. Truck is going in to a Dodge dealer in a day or two. I had a 2012 Challenger R/T with the 5.7L & remember reading about timing chain issues on the automatic vehicles - mine was a manual. Anybody know if there is a TSB for timing issues & possible component premature failure on this issue?