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4 Wheel Drive Madness

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Isuzu

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Newer Version
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The Isuzu General Motors Holden Jackaroo had a mid-term update in late 1999 for the 2000 model year. The most notable mechanical change was in the transmission: Base models retained the part-time manual four wheel drive system with manual locking free wheel hubs, but the SE Jackaroos got a push-button "torque on demand" system, i.e. an electrically operated multi-plate clutch to take drive to the front wheels.

Low range is still selected by a lever mounted on the floor. The 3.5 litre V6 petrol engine produces 158kW at 5400rpm and 310Nm at 3000rpm.

The 3 litre diesel (118kW at 3900rpm, 333Nm at 2000rpm) Jackaroos got the option of a 4-speed automatic transmission in late 1999.

The diesel is one of the modern common-rail diesel engines, which use very high pressure fuel delivery of 40,000kPa to hydraulic/electronic injectors operating at tip pressures up to 140,000kPa.
Manufacturer's figures:

  • station wagon, 5 seats, 4 doors, air-bags
  • loa: 4660mm, width: 1745mm, height: 1840mm
  • wheelbase: 2760mm, track: 1455mm/1460mm, grnd clearance: 195mm (petrol), 170mm (diesel)
  • approach: 40, departure: 31
  • turning radius: 5.8m
  • weight: 1890-2020kg (unladen), GVM: 2600kg
  • petrol:
    • 3.5L, petrol, V6, mpfi, 4-valves/cyl, dohc
    • power: 158kW at 5400rpm, torque: 310Nm at 3100rpm
  • diesel:
    • 3.0L 4-cyl turbo-charged and intercooled, 4-valves/cyl, dohc
    • power: 118kW at 3900rpm, torque: 333Nm at 2200rpm
  • transmission: 5m/4a, part-time 4WD (2.051:1 lo, 1.0:1 hi)
  • The Monterey has a `torque on demand' 4WD system, with sensors applying a multiplate clutch to limit front/rear wheel spin
  • suspension: indep-torsion-bar / live-coil, brakes: disc/disc (ABS std on Monterey, optional on SE auto from '99)
  • tyres: 245/70R16 (can fit LT225/75R16 and LT235/70R16), fuel-tank: 85L