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4wd won't engage..any help would be great!

Discussion in 'Technical Chat' started by racerjacer, Aug 30, 2009.

  1. Aug 30, 2009 at 8:49 PM
    #1
    racerjacer

    racerjacer [OP] New Member

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    Hey guys, I have a 1999 4x4 with the optional rear locker and for some unusual reason, the 4wd will not engage. I have searched many old posts but unfortunately I am unable to find any information. I pull the lever into 4hi and the 4x4 light comes on for a fraction of a second but the front diff never engages. I can get the rear to lock up in 4lo but very perplexed. I am quite mechanically inclined and would appreciate any advice on where to start if possible. Thank you kindly!:confused:
     
  2. Aug 30, 2009 at 8:54 PM
    #2
    drew02a

    drew02a Rocking your mom's world Since 1997

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    It sounds like a problem with the ADD, but I don't know if the 1st gens had that. Do you have manual hubs? If you have automatic hubs, maybe they're broken?
     
  3. Aug 31, 2009 at 10:01 AM
    #3
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Yes, the first gens had ADD, although some were also manual (early years).

    How do you know the front is not engaging?
     
  4. Aug 31, 2009 at 10:10 AM
    #4
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
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