Well, I’m back with another issue I’m struggling through. I’ve got a 1998 k3500 4x4 with 7.4 and nv4500. Recently, my truck started shuddering in 3rd, 4th, and 5th gear when accelerating. Not noticeable in 1st and 2nd. It does this once it warms up, but not when it’s cold. My scan tool says it’s...