Some 2008 F-Super Duty 350 and 450 Chassis Cab vehicles equipped with a 6.4L diesel engine and a Dana 80 dual rear wheel axle may exhibit a 4th-order engine moan/drone concern between 1,500-2,000 rpm.
Replace the driveshaft with a revised part number per application.
PART NUMBER DRIVESHAFT ASSEMBLY
8C3Z-4R602-EEA……………140.8” WB/4X2/AUTO/DRW
8C3Z-4602-AHA……………..140.8” WB/4X4/AUTO/DRW
8C3Z-4R602-ADA……………161.8” WB/4X2/AUTO/DRW
8C3Z-4R602-BMA……………161.8” WB/4X4/AUTO/DRW
8C3Z-4R602-AMA……………164.8” WB/4X2/AUTO/DRW
8C3Z-4R602-AVA…………….164.8” WB/4X4/AUTO/DRW
8C3Z-4R602-AFA…………….176.2” WB/4X2/AUTO/DRW
8C3Z-4R602-BDA…………….176.2” WB/4X4/AUTO/DRW