2005-2007 Super Duty 4WD ESOF DieselSite Stainless Vacuum Lines Kit

Is your 4-wheel drive ESOF (electronic shift on the fly) not working?

Chances are, the hoses to your vacuum-operated hubs are dry rotted, or the steel fittings at the hubs are rusted and leaking. DieselSite's 4WD ESOF hose kits will replace the OEM fittings and rubber vacuum hoses with Teflon-lined stainless steel braided lines.