The FX4 4X4 Off Road Package includes Hill Descent Control on SRW, transfer case and fuel tank skid plates, Rancho® branded shocks – colored front and rear shocks, unique “FX4 Off-Road” box decal (requires 4×4, limited-slip rear axle on DRW, electronic locking rear differential on SRW and all-terrain tires). The electronic locking rear differential, when engaged, provides excellent off-road traction in both 4×2 and 4×4 modes on single-rear-wheel models by locking the rear axle completely to maximize traction on both rear wheels simultaneously. Snow Plow Prep Package includes computer selected springs for snowplow application and extra heavy-duty alternator with Power Stroke® diesel engine or heavy-duty alternator with gas engine (not available with Heavy Service Suspension Package; requires 4×4). n addition to the driver and passenger front air bags, 2011 Ford Super Duty® provides standard side airbags for front seat passengers plus the Safety Canopy® System with side curtain airbags for rear seat occupants in SuperCab and Crew Cab models. Always wear your safety belt and secure children in the rear seat, where available. Ford Work Solutions – Cable Lock by Master Lock™: A 9.5′ rugged retractable cable that helps deter theft and secure personal items in the bed of the truck (replaces Cargo Tie Down Hooks; not available with Pickup Box Delete).
