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Four-wheel drive systems include Quadra-Trac I, Quadra-Trac II, and Quadra-Drive II. Using Selec-Terrain, the driver can select modes for Auto, Sport, Snow, Sand/Mud, and Rock. Optional height-adjustable air suspension, which Jeep refers to as "Quadra-Lift", can raise the vehicle's ground clearance up to 11.1 in (282 mm). [10]
In addition to rear-wheel-drive, three different four-wheel-drive systems are available, and use a new Selec-Terrain toggle controller (the Quadra Drive II four-wheel-drive system also features the Quadra-Lift air suspension system. The Quadra-Lift system can raise or lower the vehicle to different heights, and is standard on all Trailhawk models.
Quadra-Trac II selector in a 1999 Jeep Grand Cherokee (WG) Quadra-Trac II was introduced in 1999 and it employs a two-speed chain-driven transfer case featuring three modes of operation, "4-All Time", "N" or neutral, and "4-Lo". Two different transfer cases were used, the NV247 in 1999-2004 WJs and the NV245 in 2005-2010 WKs and 2006-2009 XKs.
Height adjustable suspension is a feature of certain automobile suspension systems that allow the motorist to vary the ride height or ground clearance. This can be done for various reasons including giving better ground clearance over rough terrain, a lower ground clearance to improve performance and fuel economy at high speed, [1] or for stylistic reasons.
Air line failure is a failure of the tubing which connects the air bags or struts to the rest of the air system, and is typically DOT-approved nylon air brake line. This usually occurs when the air lines, which must be routed to the air bags through the chassis of the vehicle, rub against a sharp edge of a chassis member or a moving suspension ...
The CJ-3A had beefed-up suspension (10 leaf) to accommodate the various agricultural implements that were being built for the vehicle. [20] Another difference was a shorter rear wheelwell (the wheelwell from the top front edge to the rear of the body is 32 in (810 mm) on the 3A compared to 34 in (860 mm) on the 2A) and moving the driver's seat ...
The same system was applied to the Land Rover in the 1980s when these vehicles adopted the Range Rover's coil spring suspension. In the 1990s Land Rover, in pursuit of the same blend of on- and off-road ability, developed an air suspension system that was both self-levelling and height adjustable.
American Motors' vice president of engineering, Roy Lunn, designed what is known as the "Quadra-Link" suspension, that limited rollovers. [16] Renault's François Castaing developed the drivetrain using a much smaller engine than normally found in 4WD vehicles and reduced the weight of the new model. [ 17 ]