It could of been messed up by a shop along the way. A guy called me a few weeks ago about a Toyota dealership tried to install a lift, and didn’t release the set screws. Then at the end of the job, they opened the set screws all the way up and shot fluid on the muffler. They then tightened it up and sent the truck in its way. Customer found smoke coming off the muffler and the drive “felt odd.”
So who knows what “service professional” has done to it along the way. I feel like that needs to be considered more than most issues on these trucks. The amount of things I find under 200 from past work is pretty appalling.
this scenario is full fubar