Ford F-150 Front Driveshaft Assembly 938-818 4WD

This is a complete front driveshaft assembly for 4WD 2011-2017 Ford F-150 trucks and 2015-2017 Ford Expedition and Lincoln Navigator. It replaces Ford BL3Z-4A376-A, BL3Z-4A376-B and FL3Z-4A376-A, and cross-references to Dorman 938-818.

The shaft is steel, balanced, and ready to bolt in. It connects the transfer case front output to the front differential.

The front shaft on these trucks is a common wear item. The joint boots split, grit gets into the joint, and the joint starts to click or bind, especially when turning in 4WD. Other signs are a vibration that shows up only in 4WD, grease thrown around the inside of the frame rail near the transfer case, or a clunk when 4WD engages.

To install, mark both flanges, support the shaft, remove the flange bolts at the transfer case and the front axle, and lower the shaft out. Install the new shaft, run the bolts in by hand, torque them to the factory spec, and road test in 2WD and 4WD. Check the front differential and transfer case fluid while the truck is up.