The Ford F-150 gets a few minor changes for 2012. A 36-gallon fuel tank is standard on all four-wheel-drive F-150s with the turbocharged V6 engine. Other drivetrain upgrades include a new two-speed automatic transfer case for upper trim levels and an electronic locking rear axle that replaces the limited-slip option on many models. Also, all 4WD trucks now have neutral tow capability, meaning customers can flat-tow their F-150 behind a motorhome. Finally, the Sync system gains expanded capabilities (AppLink) for smartphones. The 2012 Ford F-150 continues to offer a wide range of cab and cargo bed combinations in two- and four-wheel drive. Most are available in the base and midlevel trims, while the versatile and spacious SuperCrew dominates the luxury trims and special editions. Ford also offers a number of unique and useful perks, among these a flat rear floor, a deployable step that eases access to the cargo bed and Ford's Sync multimedia voice command system. For commercial-grade use, Ford offers the contractor-oriented lineup of "Work Solutions" options.