I am experiencing harsh grinding in the drivetrain (feels like it is coming from the transfer case right under the floor) when I accelerate from a stop with a load/towing a trailer.
Problem is produced regardless of being in auto 4wd, 4x4, 2x4.
Truck is smooth as a luxury sedan at highway speeds and there is no vibration that would be expected from slip yoke/shaft binding. The grinding only happens when punching the throttle while carrying or pulling a heavy load from a dead stop.
I also have the notorious studder and occasional clunk during shifts, but this grinding problem is entirely different and feels horrible to the point that I’m surprised something hasn’t broken yet.
I have no idea what is causing this. Has anyone else experienced something similar?