Jeeps liberty Four Wheel Drive Systems " Jeep Liberty 2005-2007 "Four Wheel Drive Systems Jeep Liberty
The Jeep Liberty is available with either a part time Command-Trac or full time Selec-Trac transfer case.
The Command-Trac transfer case has four positions: 2-HI, 4-HI, Neutral, and 4-LO. The lever is placed in 2WD HI for regular driving. This allows the two rear tires to receive power. The second position, 4WD HI, is used for driving on slippery or loose surfaces. This position locks both the front and rear drive shafts together splitting engine power equally between all four tires. The third position, Neutral, disengages both drive shafts from the transfer case allowing the car to roll freely; this is used for towing behind another vehicle, for example. The last position, 4WD LO is used for situations when higher torque is needed. A common misconception is that 4WD LO provides more traction. It only changes the gear ratio and does not add any more friction between the tires and the driving surface. This position, like 4WD HI locks both the front and rear drive shafts together, and by using a lower gear ratio, allows for 2.72 times more torque (however, the speed is limited to around 25 MPH max). It should be noted that using 4WD HI or LO on dry pavement is hazardous to vehicle components, through driveline binding and wheel-hop.
The Selec-Trac transfer case has five positions: 2-HI, 4-HI Part-Time, 4-HI Full-Time, Neutral, and 4-LO. The transfer case is different from the Command-Trac transfer only in the extra 4WD HI Full-Time position. The 4WD HI Full-Time position adds the same traction benefits that the part-time 4WD setting offers, but features an open differential between the front and rear axles to allow the two axles to spin at independent speeds and eliminate drive line binding and wheel-hop. The down side of 4WD Hi Full-Time is that, due to the open differential between front and rear drive lines, at times the drive train will only deliver power to the front or the rear e.g. when the front of the vehicle has reached a high traction surface such as dry pavement and the rear is in sand, the rear tires will spin with 100% of engine power, the front receiving no traction. Under equal traction conditions (front-rear) this position gives the rear wheels 52% of the engine's power and the front wheels 48% of the engine's power. The division of power and open center differential allows the Selec-Trac transfer case to be operated at all times in an "All Wheel Drive" mode with no adverse effects.
The Jeep Liberty International versions
Numerous versions are available in markets outside the U.S. and Canada.
Early 02 - Mid 03 CRDs were 2.5lt VM Motori Diesel and had 105Kw and 343Nm (std external wastegated turbo and Manual only)
A commercial Cherokee version with 2.5 CRD engine and five-speed transmission rated at 34.4 miles per imperial gallon (8.21 L/100 km; 28.6 mpg-US) has a completely flat cargo area (the rear seat area has a carpeted full-length galvanized metal floor) and the rear quarter glass and rear door glass is replaced with fixed body colored aluminium panels (the front doors have power windows). For additional cargo security a removable floor to ceiling metal and mesh bulkhead is optional. In European markets, VAT registered buyers can claim back the tax paid as this qualifies as a Commercial Vehicle.
* Arab American Vehicles Company (a joint venture) assembles the Jeep Cherokee (Liberty) for the Egyptian market.
* Carabobo Assembly Plant (DaimlerChrysler de Venezuela) assembles the Jeep Cherokee (Liberty) in Valencia, Carabobo for the Venezuelan market.
.............http://en.wikipedia.org/wiki/Jeep_Liberty
The Jeep Liberty is available with either a part time Command-Trac or full time Selec-Trac transfer case.
The Command-Trac transfer case has four positions: 2-HI, 4-HI, Neutral, and 4-LO. The lever is placed in 2WD HI for regular driving. This allows the two rear tires to receive power. The second position, 4WD HI, is used for driving on slippery or loose surfaces. This position locks both the front and rear drive shafts together splitting engine power equally between all four tires. The third position, Neutral, disengages both drive shafts from the transfer case allowing the car to roll freely; this is used for towing behind another vehicle, for example. The last position, 4WD LO is used for situations when higher torque is needed. A common misconception is that 4WD LO provides more traction. It only changes the gear ratio and does not add any more friction between the tires and the driving surface. This position, like 4WD HI locks both the front and rear drive shafts together, and by using a lower gear ratio, allows for 2.72 times more torque (however, the speed is limited to around 25 MPH max). It should be noted that using 4WD HI or LO on dry pavement is hazardous to vehicle components, through driveline binding and wheel-hop.
The Selec-Trac transfer case has five positions: 2-HI, 4-HI Part-Time, 4-HI Full-Time, Neutral, and 4-LO. The transfer case is different from the Command-Trac transfer only in the extra 4WD HI Full-Time position. The 4WD HI Full-Time position adds the same traction benefits that the part-time 4WD setting offers, but features an open differential between the front and rear axles to allow the two axles to spin at independent speeds and eliminate drive line binding and wheel-hop. The down side of 4WD Hi Full-Time is that, due to the open differential between front and rear drive lines, at times the drive train will only deliver power to the front or the rear e.g. when the front of the vehicle has reached a high traction surface such as dry pavement and the rear is in sand, the rear tires will spin with 100% of engine power, the front receiving no traction. Under equal traction conditions (front-rear) this position gives the rear wheels 52% of the engine's power and the front wheels 48% of the engine's power. The division of power and open center differential allows the Selec-Trac transfer case to be operated at all times in an "All Wheel Drive" mode with no adverse effects.
The Jeep Liberty International versions
Numerous versions are available in markets outside the U.S. and Canada.
Early 02 - Mid 03 CRDs were 2.5lt VM Motori Diesel and had 105Kw and 343Nm (std external wastegated turbo and Manual only)
A commercial Cherokee version with 2.5 CRD engine and five-speed transmission rated at 34.4 miles per imperial gallon (8.21 L/100 km; 28.6 mpg-US) has a completely flat cargo area (the rear seat area has a carpeted full-length galvanized metal floor) and the rear quarter glass and rear door glass is replaced with fixed body colored aluminium panels (the front doors have power windows). For additional cargo security a removable floor to ceiling metal and mesh bulkhead is optional. In European markets, VAT registered buyers can claim back the tax paid as this qualifies as a Commercial Vehicle.
* Arab American Vehicles Company (a joint venture) assembles the Jeep Cherokee (Liberty) for the Egyptian market.
* Carabobo Assembly Plant (DaimlerChrysler de Venezuela) assembles the Jeep Cherokee (Liberty) in Valencia, Carabobo for the Venezuelan market.
.............http://en.wikipedia.org/wiki/Jeep_Liberty