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Anti lock brakes

Discussion in 'Commercial Snow Removal' started by ChucksChevyPages, Dec 27, 1999.

  1. ChucksChevyPages

    ChucksChevyPages Guest
    Messages: 0

    This may be the wrong place to ask this. It may be complex, and maybe not, but......<br>Does engaging 4wd bypass the anti lock brake systems on most trucks? Does engaging 4wd low only, bypass the anti locks, or does nothing bypass the anti - locks?<br>How would anti locks affect tire chain operation, or vice versa?<br>Would not being able to lock the brakes rob the benefits of chains in a braking situation?<br>Anyone run chains with anti - locks?<p>~Chuck Smith<br><p>----------<br>Chuck's Chevy Truck Pages - Snowplowing Central<br>http://members.aol.com/csmith669/plowcentral.html
     
  2. thelawnguy

    thelawnguy PlowSite.com Addict
    Messages: 1,011

    On Dodge vehicles, it does not deactivate 4wabs. GM trucks it does some model years. not sure about Ford. Rear only abs is unaffected. I removed the controller for rear only abs on my Dodge, abs is dangerous with 4wd. <p>It used to be, at least thru 99 model year, 4wabs was unavailable with snowplow prep on Dodge and also with offroad package due to its unpredictable nature in 4WD.<p>Bill
     
  3. jspivxl102

    jspivxl102 Member
    Messages: 46

    Why would 4WD bypass the antilocks?
    JP
     
  4. John DiMartino

    John DiMartino PlowSite.com Veteran
    Messages: 2,154

    Wow,this is an old post! I got excited and thought lawnguy was posting again until I looked at the date:( .Anyway all rear wheel anti lock brake trucks dissengage the rear wheel antilocks once its put into 4wd,since the front and rear axles are then tied together anyway..I dont know if any 4wABS trucks that do though.
     
  5. hoagie

    hoagie Member
    Messages: 64

    02' Ford and 4w-abs still works in 4WD... I wish it didn't.
     
  6. sonjaab

    sonjaab PlowSite.com Addict
    Messages: 1,425

    NEW 99 & up full size GMs...The antilocks DO work in
    any 4 wd mode.
    My 97 GM the antilocks DID NOT work in 4 wd.....
    And yes ...They are a PIA when plowing!....geo
     
  7. Mick

    Mick PlowSite.com Veteran
    from Maine
    Messages: 5,546

    John, there have been several really old threads brought up today. A couple made me do double-takes.
     
  8. Chief Plow

    Chief Plow Senior Member
    Messages: 201

    I know on all my new superduties, the anti locks do not disengage in 4wd... I certainly wish they did though...

    Rick
     
  9. Nozzleman

    Nozzleman Senior Member
    Messages: 267

    '03 Dodges still have ABS in 4WD.