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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.
Selec-Trac had the option of either full-time or part-time operation; both shift-on-the-fly Command-Trac and Selec-Trac were already available for the Cherokee, and they were adapted to the Grand Cherokee. Exclusive to the Grand Cherokee was the introduction of the Quadra-Trac system with permanent all-time four-wheel assistance. This was ...
The system was primarily used on pickup trucks. At lower speeds, it turns in opposite direction of the forward wheels to a maximum of 15°, or 12° in trailer mode, decreasing the turning radius as much as 21%. At higher speeds the system will turn the rear wheels slightly in the direction of the front wheels so as to increase stability and ...
The Jeep Wrangler (pictured is a TJ Wrangler) is a 4WD vehicle with a transfer case to select low-range or high-range four-wheel drive.. A four-wheel drive, also called 4×4 ("four by four") or 4WD, is a two-axled vehicle drivetrain capable of providing torque to all of its wheels simultaneously.
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]
The "Trac-Lok" limited-slip differential replaced the "Powr-Lok" in 1971, and PTOs were no longer available after that year. [52] AMC began marketing the Jeep less as a universal utility vehicle, and more as a sporty one, notably increasing its performance and features. 1972 Revamp The 1972 model year brought significant changes to the CJ-5.
ControlTrac four-wheel drive is the brand name of a selectable automatic full-time four-wheel drive system offered by Ford Motor Company.The four-wheel drive system was designed and developed at BorgWarner under its TorqTransfer Systems division in the mid 1980s.
Semi-trailer aerodynamic devices are devices affixed to semi-trailers, for the purpose of reducing aerodynamic drag caused by air turbulence. The two major types of device in use are trailer skirts (or side skirts ), affixed to the underside of trailers, and trailer tails (or boat tails , or rear fairings ), affixed to the rear.