The SRT8 uses the Quadra-Trac active on-demand 4WD system. Also available is an optional air suspension that raises or lowers the ride height. Quadra-Trac II and Quadra-Drive II include a Selec-Terrain system that can be dialed in for Auto, Sport, Sand/Mud, Snow and Rock settings. Quadra-Drive II, optional on the Laredo X, Limited and Overland, works similarly but includes an electronic limited-slip differential that can concentrate up to 100 per cent of power to a single wheel. Quadra-Trac II, optional on Laredo X and standard on Limited and Overland, adds low range and is capable of sending 100 per cent of torque to either the front or rear axle. The Laredo E and Laredo X use Quadra-Trac I, a full-time 4x4 system that continuously distributes torque 48/52 front to rear. The SRT8 uses a 6.4-litre V8 with five-speed automatic. This can be optioned to a 5.7-litre Hemi V8 with six-speed automatic transmission in the Laredo X, Limited and Overland. The Grand Cherokee is available with a 3.6-litre V6 engine and five-speed automatic transmission in the Laredo E, Laredo X, Limited and Overland.

The 5.7-litre Hemi V8 now uses a six-speed automatic transmission, and the V6 models receive electro-hydraulic power steering.

NEW FOR 2012: - Grand Cherokee SRT8 added - Six-speed automatic transmission replaces five-speed automatic on 5.7-litre V8 - Standard Uconnect hands-free phone operation - V6 models add electro-hydraulic power steering For 2012, the Jeep Grand Cherokee reintroduces the SRT8, which now uses a 6.4-litre Hemi V8 engine.

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