Welcome to the jeepExperts.com in-depth web page of WJ Generation Jeep Grand Cherokee 4 wheel drive system. Did we mis something? Please get in contact with us and inform us about it!
WJ switch instances |
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| System | Case | Features | |||
| 1. Quadra-Trac I | NV147 | On-demand; makes use of a gerotor coupling for improved response; high-range solely (doesn’t embody impartial or low-range positions). | |||
| 2. Quadra-Trac II | NV247 | On-demand; consists of low-range (2:72:1); single lever switch case mode operation. | |||
| 3. Selec-Trac | NV-242 | Full-time; two pace with shift on the fly; consists of low-range (2:72:1); permits for two- or four-wheel-drive mode; full or part-time 4WD; single lever switch case mode operation. | |||
| 4. Quadra-Drive | NV247 | On-demand; makes use of a gerotor coupling within the Quadra-Trac II switch case and within the Vari-Lok entrance and rear progressive axles to ship torque to the entrance driveshaft and/or from side-to-side inside every axle when wheel slippage happens; consists of low-range (2:72:1) single-lever switch case mode | |||
WJ drive programs availability
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| System | 1999-2000 | 2001 | 2002 | 2003 | 2004 | |
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N/A | N/A | N/A | N/A | Laredo I6 (decide) Laredo V8 n/aAll different fashions n/a |
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Laredo I6 (decide) Laredo V8 (std)Limited I6 (decide) Limited V8 (std) |
Laredo I6/V8 (decide) Limited ‘G’ (std) Limited ‘Okay’ n/a |
Laredo I6/V8 (decide) Limited ‘G’ (std) Limited ‘Okay’ n/aOverland n/aSpecial Edition I6 n/a Special Edition V8 (std)Sport (?) |
Laredo I6/V8 (decide) Limited ‘G’ (std) Limited ‘Okay’ n/aOverland n/a |
Laredo I6 (decide) Laredo V8 (std)Limited ‘G’ (std) Limited ‘Okay’ n/aOverland n/aSpecial Edition I6 (decide) Special Edition V8 (std)Freedom V8/V8HO (std)Columbia I6 n/a Columbia V8HO (std) |
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1999: Laredo I6 (std) Laredo V8 (n/a)2000: Laredo I6 (std) Laredo V8 (decide)Limited I6/V8 (decide) (no-cost possibility with V8) |
Laredo I6/V8 (std) Limited I6/V8 (decide) (no-cost possibility with V8) |
Laredo I6/V8 (std) Limited I6/V8 (decide)Overland n/aSpecial Edition I6 (std) Special Edition V8 n/aSport I6/V8 (std) |
Laredo I6/V8 (std) Limited I6/V8 (std)Overland n/a |
Laredo I6 (std) Laredo V8 n/aLimited n/aOverland n/aSpecial Edition I6 (std) Special Edition V8 n/aFreedom I6 (std) Freedom V8/V8HO n/aColumbia I6 (std) Columbia V8HO n/a |
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Laredo “D” n/a Laredo ‘E’ (decide) Laredo ‘F’ (decide)Limited ‘G’ (decide) Limited ‘Okay’ (decide) |
Laredo ‘E’ n/a Laredo ‘F’ n/a Laredo ‘S’ (decide)Limited ‘G’ n/a Limited ‘Okay’ (std) |
Laredo n/a Limited ‘G’ (decide) Limited ‘Okay’ (std)Overland (std)Special Edition n/aSport n/a |
Laredo n/a Limited ‘G’ (decide) Limited ‘Okay’ (std)Overland (std) |
Laredo n/a Limited ‘G’ (decide) Limited ‘Okay’ (std)Overland (std)Special Edition n/aFreedom n/aColumbia n/a |
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WJ limited-slip differentials
(Vari-Lok geared up axles use a progressive, hydro-mechanical speed-sensing torque switch coupling)
| Type | 1999-2000 | 2001 | 2002 | 2003 | 2004 |
| Front Vari-Lok (Dana 30 axle) |
Available solely with (and included with) all QuadraDrive programs | ||||
| Rear Trac-Lok (2WD solely) n/a with V8 n/a with QTII or Quadra-Drive |
Optional all 2WD fashions (besides V8) |
Optional all 2WD fashions (besides V8) |
Replaced with Vari-Lok beginning with 2002 mannequin yr | ||
| Rear Vari-Lok (Dana 44 axle) |
Laredo ‘D’ n/a Laredo ‘E’ (decide) Laredo ‘F’ (decide)Limited ‘G’ (decide) Limited ‘Okay’ (decide)(Available solely with QuadraDrive programs for 1999-2000) |
Laredo (decide)Limited ‘G’ (decide)
Limited ‘Okay’ (std) |
Laredo (decide)Sport n/a
Limited ‘G’ (decide) Limited ‘Okay’ (std) Overland (std) Special Edition n/a |
Laredo (decide)Limited ‘G’ (decide)
Limited ‘Okay’ (std) Overland (std) |
Laredo (decide)Limited ‘G’ (decide)
Limited ‘Okay’ (std) Overland (std) Special Edition (decide) Freedom n/a Columbia n/a |
WJ Transfer case specs
Type 1: NV147 Quadra-Trac ITM
- On-demand 4-wheel drive switch case with one working vary – the one working vary is 4-high
- 2004 Laredo fashions solely, obtainable as a no-cost possibility
Operating Modes: 4WD High, full-time
Center Differential: Planetary with low-range lock
Torque Split: Variable (0-100%)
Under regular driving situations, the system operates conventionally, and the vast majority of obtainable torque is utilized to the rear wheels. However, when front-to-rear wheel pace variations exist, the progressive differential transfers torque to the axle with the higher traction, thus minimizing wheel spin and maximizing management.
A round ID tag is hooked up to the rear case of every switch case. The ID tag offers the switch case mannequin quantity, meeting quantity, gear ratio and site of manufacture. The switch case serial quantity additionally represents the date of construct.
NV-147 Fill and drain plug areas
Type 2: NV247 Quadra-Trac II™
- Type: Progressive On Demand
- Full time 4WD operation sends energy to each the entrance and rear axles underneath regular driving situations and robotically transfers torque to the entrance as wanted
- Gerotor pump within the switch case transfers energy instantly to the entrance axle when wheel slip is detected. offers four-wheel drive energy robotically, with no driver enter
- Includes a low-range mode for extreme highway situations and low-speed pulling energy
- Includes a impartial mode that enables the car to be towed
The NV247 is an on-demand 4-wheel drive switch case with two working ranges and a impartial place. Under regular driving situations, the system operates conventionally, and the vast majority of obtainable torque is utilized to the rear wheels. However, when front-to-rear wheel pace variations exist, the progressive differential transfers torque to the axle withthe higher traction, thus minimizing wheel spin and maximizing management.
Operating Modes:
4WD High, full-time (Sends energy to all wheels)
NEUTRAL (Allows car to be towed)
4WD Low, part-time (Doubles the switch case gear ration for extreme highway situations and low-speed pulling energy)
Low Range Ratio: 2.72:1
Center Differential: Gerotor pump-applied disc clutch with low-range lock
Torque Split: Variable (0-100%)
Maximum Capacity Torque: 1800 lbs.-ft.
Weight: 83 Lbs.
Oil Fill Capacity: 2.5 pts.
A round ID tag is hooked up to the rear case of every switch case. The ID tag offers the switch case mannequin quantity, meeting quantity, serial quantity, and low vary ratio. The switch case serial quantity additionally represents the date of construct.
| NV-247 Fill and drain plug areas | NV-247 Quadra-Trac drive system |
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Type 3: NV242 Selec-Trac®
- Type: Full-time
- Full time 4WD operation sends energy to each the entrance and rear axles underneath regular driving situations.
- Open middle differential permits four-wheel drive operation on any highway floor.
- Shift-on-the-fly functionality permits switching between two-wheel drive, part-time excessive vary 4WD and full-time 4WD, at speeds as much as 55 mph
- Available Trac-Lok limited-slip rear differential with torque-sensing system for sustaining traction on slippery surfaces. Automatically distributes torque to the rear wheel with essentially the most traction, thereby decreasing wheel spin on the different wheel
The NV242 offers full time 2-wheel, or 4-wheel drive operation. A differential within the switch case is used to manage torque switch to the entrance and rear axles. A low vary gear offers elevated low pace torque functionality for off highway operation. The low vary offers a 2.72:1 discount ratio.
The 2WD and 4×4 full time ranges can be utilized at any time and on any highway floor. The 4×4 part-time and 4 Lo ranges are for off highway use solely. The solely time these ranges can be utilized on onerous floor roads, is when the floor is roofed with snow and ice.
The geartrain is mounted in two aluminum case halves hooked up with bolts. The mainshaft entrance and rear bearings are mounted in aluminum retainer housings bolted to the case halves. Two variations of the NV242 are used within the WJ automobiles, NV242LD and NV242HD. The two switch instances could be distinguished from each other by the rear output shaft retainer. The NV242LD makes use of a rubber boot to cowl the rear output shaft, whereas the NV242HD makes use of a forged aluminum housing.
Operating Modes:
2WD (Sends all energy to rear wheels)
4WD High, full-time (Sends energy to all wheels)
4WD High, part-time (Locks each entrance and rear driveshafts for elevated traction)
NEUTRAL (Allows car to be towed)
4WD Low, part-time (Doubles the switch case gear ration for extreme highway situations and low-speed pulling energy)
Low Range Reduction Ratio: 2.72:1
High Range: 1:1
Center Differential: Open, Planetary with low-range lock
Torque Split: F/R 48/52
Maximum Capacity Torque: 1486 lb.-ft. (LD); 2028 lbs.-ft. (HD)
Weight: 86 Lbs. (LD); 90 lbs (HD)
Oil Fill Capacity: 2.85 pts. (LD); 6.5 pts. (HD) (ATF+4)
A circular ID tag is hooked up to the rear case of every switch case. The ID tag offers the switch case mannequin quantity, meeting quantity, serial quantity, and low vary ratio. The switch case serial quantity additionally represents the date of construct.
Type 4: Quadra-Drive™
(NV-247 or NV-147 switch case with Vari-Lok axles)
- On-demand 4WD system, makes use of a gerotor and coupling within the Quadra-Trac II switch case and Vari-Lok entrance and rear axles for transferring torque back and forth
- Sends torque to the rear wheels underneath regular driving situations, capable of ship 100% of energy to only one wheel when wanted
- Operates at most functionality on a regular basis
- Includes a low-range mode for extreme highway situations and low-speed pulling energy
- Includes a impartial mode that enables the car to be towed
Operating Modes:
4WD High, full-time (sends energy to all wheels)
NEUTRAL (Allows car to be towed)
4WD Low, part-time (doubles the switch case gear ration for extreme highway situations and low-speed pulling energy)
Low Range Ratio: 2.72:1
Center Differential: Gerotor pump-applied disc clutch with low-range lock
Torque Split: Variable (0-100%)
A round ID tag is hooked up to the rear case of every switch case. The ID tag offers the switch case mannequin quantity, meeting quantity, serial quantity, and low vary ratio. The switch case serial quantity additionally represents the date of construct.
| NV-247 Fill and drain plug areas | NV-247 Quadra-Drive drive system |
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