So, I ended up getting out of a 2016 RAM 1500 due to a lifter and cam failure. I purchased a 2016 Challenger R/T only to have the exact same issue. The was able to immediately find that it was a lifter failure and had ate the cam shaft. This is the 3rd time this has happened to me on 5.7L hemi. The car started and would rev high on a cold start then the infamous hemi tick would start. This would increase with acceleration and was very noticeable and loud during decel at high RPM. I tried switching to non-mds lifters in the hopes of doing away with the issue. But doing this would en-tale a cam swap, dyno tune, the whole works this would end up a 4000 job not covered under warranty. Its sad that Chrysler Corp. has not fixed these time bomb issues. They are well known and wide spread. As soon as I can I will be switching from Dodge and getting a more reliable sports car.