A single selectable traction control management system (Select-Terrain) is available with two feature packages (Off-Road Group I and II) on the following four wheel drive systems: Rock-Trac (Wrangler Rubicon), Command-Trac (Wrangler), Command-Trac II (Liberty), Selec-Trac II (Liberty), Quadra-Drive II (Grand Cherokee), Quadra-Trac I (Grand Cherokee), Quadra-Trac SRT (Grand Cherokee SRT8), Quadra-Trac II (Grand Cherokee), and Freedom Drive I and II (Liberty, Compass).
The Selec-Terrain system allows for Auto, Sport, Snow, Sand/Mud, and Rock settings. Jeep’s selectable programs are a little more intuitive than the Land Rover and Ford systems and come in two variations: Off-Road Group I and Off-Road Group II. We’ll be looking at the Selec-Terrain Off-Road Group II system; the closest analogy Jeep offers to full Terrain Response. The Off-Road Group II package includes an air suspension and electronic limited slip differential.
Auto - Auto is the normal driving program for use on all types of terrains. Torque is available on demand and the air suspension sits at normal ride height.
Sport - The sport setting optimizes vehicle response for dry, on-road driving. This setting gives the Grand Cherokee a rear-wheel drive feel but with the improved handling of a 4WD vehicles. This setting is most analogous to the Dynamic Mode setting on the Range Rover Evoque.
Snow - This setting is to be used on any loose surface, such as snow-covered or icy roads. The program attempts to minimize wheel slippage. This mode is similar to the Terrain Response Grass/Gravel/Snow program.
Sand/Mud - This setting is used for mud, sand, or wet grass. The setting maximizes traction by limiting traction control management of throttle and wheel spin. This program is similar to Land Rover’s Mud/Ruts setting.
Rock - The Rock setting is only available on Low range. This setting is used to navigate any obstacle requiring low-speed and careful control, such as large rocks, deep ruts, water crossings, etc. This program is similar to the Land Rover’s Rock Crawl setting.
Figure: jeep grand cherokee 2011 selec terrain controls (130KB)