bigoilbob- the last dealer visit the technician said he has tested the pressure sensor and it checks out with a voltage check. He also made his own pressure gauge to test my pump individually and verified the sensor is reading the correct pressure.Since you're offroading, are you getting hot? Are you using oil? Any power loss?
IMO, higher vis oil would help with the symptom, but not with any actual lower end problem. And you might not lube the tight places as well, especially cooler.
If there is a way to test the oil pump, that would be nice. Showing my ignorance of diagnostic techniques here....
For the oil viscosity, I haven't changed the oil weight nor the oil manufacture. Truck has been changed by the dealer since the first mile (for warranty issues exactly like this if they popped up)
I agree a higher viscosity could help the pressure. But that's not necessarily the problem.
The first time it happened I did not notice the truck was hot. But it definitely was being worked going up a rocky trail in 4Low. It only happened after I came back down the hill going back on the oil road. No overheating, temp gauge hadn't moved.
This same thing has happened more than a hand full of times the same exact way. Always low speed, climbing grades, or going up or down an incline.
I don't have power loss. No unusual motor noises from the top end. No oil burning or hot smell. I got my best milage coming back from Colorado last weekend averaging 27mpg.