I have a 2019 f-250 6.2l that exhibits intermittently a momentary growl under tow along with a 200rpm surge at several different RPMs in cruise. No other symptoms during these intermittent growls. For example, locked cruise in on level straight away pulling 32ft RV and about every 20 to 30 sec, this anomaly happens. I know the truck does a great job in adjusting torque converter in all load signatures but this seems almost an odd control "tick" that may be due to an input/feedback sensor or something.
I searched and did not find history. Anyone aware of this issue with any recommendations? Thanks in advance!