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In 1983, the NP219-based Quadra-Trac system was replaced by the NP228/229-based Selec-Trac, adding a fuel-saving 2WD mode to the full- and part-time 4WD modes of Quadra-Trac. Applications: 1980-1982 Jeep Wagoneer and full-size pickups (SJ) In 1993 Jeep re-introduced Quadra-Trac, this time on the Jeep Grand Cherokee using the NP249 transfer case.
A gear-driven Dana 20 transfer case with 2.03:1 low range was standard with the manual gearbox (which had a much lower first gear of 6.3:1), while the TH400 automatics received the permanent four-wheel-drive QuadraTrac system. The chain-driven, aluminum QuadraTrac was advanced at the time.
The 5.2 L Magnum V8 engine was available with the Quadra-Trac four-wheel drive system, which was based around an NV249 transfer case with a viscous coupler. The Quadra-Trac system was a permanent four-wheel drive system that allowed up to 60% of power to the rear wheels and a 50–50 split when loss of rear traction occurred.
Three different four-wheel-drive systems will be available: Quadra-Trac I, Quadra-Trac II featuring low range, and Quadra Trac II with Electronic Limited Slip Differential (ELSD) also known as Quadra-Drive II with low range and "Quadra Lift" air suspension system, as well as rear-wheel drive. When properly equipped, the Grand Cherokee will be ...
The Commander was offered with three different four-wheel drive systems: Quadra-Trac I, Quadra-Trac II, and Quadra-Drive II. Quadra-Trac I was available on models equipped with the 3.7 L engine; it is a full-time system that requires no driver input. Quadra-Trac II was available on models equipped with a V8 engine; it is a full-time system as ...
Transmission options included the standard part-time two-speed transfer case, automatic, and an optional new automatic all-wheel drive system called Quadra-Trac. Other features included an optional molded hardtop and steel doors. The CJ-7 was also available in Renegade and Laredo models.
Command-Trac: Yes No 2.61:1 1984–1986 New Process NP228/229 Selec-Trac: Yes Yes 2.61:1 Has a vacuum switch for 2WD-4WD selection on the fly and a separate manual lever for low-range 1987–2001 New Process NP231 Command-Trac: Yes No 2.72:1 Gear positions are 2HI, 4HI, N, 4LO 1987–2001 New Process NP242 Selec-Trac: Yes Yes 2.72:1
The Quadra-Trac II system included the NV247 transfer case with the standard open front and rear differentials. The 45RFE and 545RFE automatic transmission in the WJ was notable. It included three planetary gear sets rather than the two normally used in a four-speed automatic.