Report "I have a roaring noise at about 1800 to 3000 rpm. If I am doin 30 or 80 mph. No grinding or noise while not moving. Had a EGR code replaced it, had miss code replaced wires plugs and checked each coil all good. Replaced exghaust, front brake pads, and ujoints. Refilled rearend lube an fuel filter. Had no play in rearend bearinring. And had tranny , under warranrty, checked and serviced no problems found. Am ase certified but can't find issue. Have driven over 500 miles and no losses in power, oil pressure, nor over heating of any dearings; checked with infared gun 127 degrees at yoke leaving trans and same at all times at where yoke or pinion enter rear end"