well today i noticed that once i go over 50 mph in gear and underpower (so staying at speed or accel.), i get wicked like road noise from the rear of the truck. if you push the clutch in and coast it goes away. its LOUD though, almost reminds me of having no exhaust or big mudder tires kinda. any ideas??? and fwiw, i have like a slight "shudder" to the truck accelerating around 5-20 mph. almost more driveline related than engine. also, got a CEL at the same time p0442, evap system leak. at the auto parts store they said it usually is the gas cap, but i havent touched it in a week. my guess is one of the filler neck hoses??? theyre pretty rusty and ****ty. any answers would be helpful. thank you!!!