Grand Cherokee ZJ 1993-1998
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Equipped with one of the following four wheel drive systems:
In 1993-1995 the viscous coupling was used to lock the differential when in low range (NP249 transfer case). In 1996-1998 the differential is mechanically locked when in low range (NV249 transfer case).
Figure: Jeep Grand Cherokee Quadra-Drive II (? not sure, needs verification) (126KB)
See: Four wheel drive systems by vehicle
See: Wikipedia
Have you seen a better description of Jeep Grand Cherokee Zj 1993-1998 on the web? Please send us the link to or post it in a comment below! Grand Cherokee WJ 1999-2004
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Equipped with one of the following four wheel drive systems:
- Quadra-Drive
- automatic all wheel drive (standard on "Limited", optional on "Laredo"). Normally rear-wheel drive vehicle. The differential is the hydromechanical system based on geroter oil pump and clutch pack, located within the transfer gearbox between the driveshafts that carry power to the front and rear axles. One part of the pump, the rotor, is driven by the front driveshaft while the other part, it's case, is attached to the rear driveshaft. The system reacts faster than the viscous coupling unit of the previous Jeep AWD system. The reaction time is about 40 milliseconds. The transfer box can be also locked in low-range mode to provide equal power to the front and rear axles.
- Progressive Vari-Lok gerodisc differentials front and rear, using the same geroter pump system. Almost 100% of torque can be transferred to any wheel.
- NV247 AWD transfer case with lever-operated 2.72:1 low-range gear.
- Dana 30 non-disconnect live axle at front, aluminum central section Dana 44 at rear.
- Quadra-Trac II
- Quadra-Trac I
Figure: Jeep Grand Cherokee Quadra-Drive transmission
(33KB)
See: WJ Grand Cherokee 4x4
Do you own Jeep Grand Cherokee Wj 1999-2004? Can you please make a photo of the car's 4x4 transmission, switches, dashboard lights, etc. and send it to ? Grand Cherokee WK 2002-2010, Commander XK 2006-...
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Equipped with one of the following four wheel drive systems:
- Quadra-Drive II - full-time all wheel drive system. 48/52 percent torque split (front/rear). Electronically-controlled multi plate clutch proactively locks the center differential. 2.72:1 low-range mode. Electronic Limited Slip Differentials (ELSD) front and rear. ELSD is the Eaton EGerodisc - a hydraulically-operated electronically controlled limited slip differential that is capable of providing variable torque up to full axle lock:
Figure: jeep grand cherokee elsd (10KB)
- Quadra-Trac II - Same as Quadra-Drive but without the ELSD. Instead, an electronic traction control - Brake Traction Control System (BTCS) - is used to transfer torque from left to right.
- Grand Cherokee SRT8 2006-2009
proactive automatic all wheel drive. In normal conditions, 100% of torque is transferred to the rear axle. This system is sold under the name of Quadra-Trac I, however it is not a full-time all wheel drive, as on the other Grand Cherokees.
See: WK Grand Cherokee 4x4
Have you seen a better description of Jeep Grand Cherokee Wk 2002-2010, Commander Xk 2006-... in a paper magazine? Can you please scan it or take a photo and send it to ? Jeep Patriot (MK) 2007–present
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