I don't know. I am good at repairing. At a loss on diagnosis. This truck acts like something mechanical is really wrong. A week ago taking off down the road jerked like a ujoint broke. Later that day drove 4 miles, runs like new. Went ahead removed drive shaft, examined all components, changed carrier bearing only because rubber slight deteriation. Took off yesterday morning shuddering\, jerking. Parked it, afternoon just fine. Manual transmission with 8.8 differential, 2.9 v6.
what to look at please?
what to look at please?

