4wd

I have a 2010 5.4 L, and I think I might need to replace the vacuum tubes. (I'm hearing the grinding from one front wheel and banging from the other.) The truck originally came with vacuum hose assembly with part number AL3Z-7A785-E , but it has been discontinued. I can get my hands on a...

Does anybody have trouble-shooting suggestions for this with my 2010 5.4 L? Flipping the knob into 4L or 4H results in a "CHECK 4x4" message displaying in the IC, but no other indicator lights illuminated. Torque doesn't show any DTCs. There's no grinding sounds. The transfer-case motor is new...