NHTSA Complaint #11633278 — 2018 RAM 1500

Engine started knocking at 65mph. Slowed to find a safe place to pull out of traffic lane. Before pulling over engine stopped but was able to get completely off the road. My safety was not directly at risk but had to wait at the side of the road for 4 hours waiting for tow. The dealer stated they have no idea what failed. The engine has not been inspected. The dealer told me I would have to pay to have it torn apart to find out what failed. There were no warnings except the engine knock. Oil pressure was normal, was not overheating and no check engine light. My safety could have been at risk had I been trying to pull out into traffic. Dealer has been doing all of the scheduled oil changes and inspections. I thought this may have something to do with recall 66A/NHTSA 23V-411. Dealer stated that could not be the reason as that recall fix is a software update?