Makes sense to me. What should I cap it off with? The only thing that don't make sense to me is why the hell do we have to deal with all this vacuum crap if when you disconnect it your 4x4 still works. Hell I might not ever hook it back up. I'm just really frustrated at this grinding noise and vacuum lines period!!!!! Sorry for ranting on, I'm thinking it may be easier just to replace all vacuum lines and be done with it hopefully. Can get lines from silverstateford.com for bout $53.
06' F-150 FX4 5.4L 3:73L.S. Scab
2" Autospring LK
305/70R18 procomp xtreme m/t
5% tinted front windows
double 20% tinted rear windows