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Thread: 1999 Jeep Grand Cherokee WJ

  1. #1
    Rather Large Member Devildog's Avatar
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    Default 1999 Jeep Grand Cherokee WJ

    I am looking at one right now for a really good price. It has 200,000 miles on it and has been maintained good. Does anyone know of any real issues with them?
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    Here some info about '99 - '04 Grand Cherokees

    Best site for info on '99 - '04 Grand Cherokees.
    http://www.wjjeeps.com/

    Gears
    I6 w/o tow pkg=3.55:1
    I6 w/tow pkg or V8=3.73:1

    Differentials (stock)
    http://www.wjjeeps.com/tcases.htm

    Axels
    Rear axle
    V8 models are D44a
    I6 models are D35

    Front axle
    I6 and V8 are D30

    Things to watch for.
    -Blend Doors on Limited models with automatic climate controls.
    http://www.wjjeeps.com/climate.htm
    Check the climate control system for any codes.
    To do this, press and hold the a/c and recirc buttons while turning the left temp control knob one click clockwise.
    Codes will then display.
    You're looking for any blend door codes. I think they are in the 20's and 50's.
    This is a very common problem on WJs with automatic climate controls.
    Cold air blowing (usually on the passenger side only) when the temp is set on hot is a sure sign of blend door problems.
    It doesnt cost much to buy the parts yourself and do it yourself. You have to remove the dash though. If you take it to the dealer its a $1000.00+ job easy. To buy the parts yourself is about $120.00-$150.00.


    - Warped Rotors with Teves Calipers
    http://www.wjjeeps.com/brakes.htm
    They changed them in '02 so some '02 models are not prone to the problem. '03 and '04 are not prone to it.

    New calipers are on the left. Old ones are on the right.


    - Options year by year for 1999-2004
    http://www.wjjeeps.com/newoptions.htm


    - Transfer cases:
    NOTE: NP stands for New Process, NV stands for New Venture. They switched names in the 90s. Chrysler owned New Process; when they sold them off, they changed the name.
    http://www.wjjeeps.com/tcases.htm

    1. Quadra-Trac I - NV147 -
    On-demand; utilizes a gerotor coupling for improved response; high-range only (does not include neutral or low-range positions).

    2. Quadra-Trac II - NV247 -
    On-demand; includes low-range (2:72:1); single lever transfer case mode operation.

    3. Selec-Trac - NV-242 -
    Full-time; two speed with shift on the fly; includes low-range (2:72:1); allows for two- or four-wheel-drive mode; full or part-time 4WD; single lever transfer case mode operation.

    4. Quadra-Drive - NV247 -
    On-demand; utilizes a gerotor coupling in the Quadra-Trac II transfer case and in the Vari-Lok front and rear progressive axles to send torque to the front driveshaft and/or from side-to-side within each axle when wheel slippage occurs; includes low-range (2:72:1) single-lever transfer case mode operation.



    Hope that helps you out some.


  3. #3
    Rather Large Member Devildog's Avatar
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    Default

    Man thanks for that. Im headed down tomorrow to check it out. Lot of good reading there.
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