The factory u-joints on an expedition are non greaseable.....I had to replace mine with universal greaseable u-joints.
It is not safe to drive a Ford Expedition with a broken lower trailing bar because it can snap the drive-shaft mount.
The engine crank shaft is inside the engine
The rear differential plug is located on the inside top part of the differential. Where the drive shaft connects.
there is no drive shaft it's front wheel drive
The 2011 Ford Expedition has rear wheel drive.
The 2002 Ford Expedition has rear wheel drive.
The 2009 Ford Expedition has rear wheel drive.
The 2008 Ford Expedition has rear wheel drive.
The 2001 Ford Expedition has rear wheel drive.
The 2010 Ford Expedition has rear wheel drive.
The 2007 Ford Expedition has rear wheel drive.
The 2006 Ford Expedition has rear wheel drive.