Since there doesn't seem to be any central thread with useful How-To links to all the of the millions of how-to's out there; I'm creating one for us.
Post up any of your bookmarked useful how-to links, and I'll add them to this top post
Axles
Maintenance
Changing Differential Fluid (JH)
Changing Differential Fluid (Xplor)
Changing Differential Fluid (Stu)
Dana 30
Axle Shaft Removal (Stu)
U-Joint Replacement (Stu)
Ford 8.8
Fixing the weak link in the Ford 8.8 Axle Housing (Wire)
Miscellaneous
Axle Identification Chart / Guide
Exhaust
Repair
Oxygen Sensor Replacement (Xplor)
Tech Directories
Jeep Horizons
4x4Wire
4x4Xplor
Stu-Offroad
MyXJ