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Diff lock not engaging?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Chevyho, Nov 9, 2015.

  1. Nov 9, 2015 #1
    Chevyho

    Chevyho Medium Load Member

    350
    55
    Dec 13, 2013
    0
    I have a dsp41 diff in a 07 pete. It has 3 way locks (inter axle and rear diff lock). When I engage the rear diff lock only one side spins and I can hear a very faint ticking inside the diff. Its been like this since I got the truck 2 years ago. Do the air cylinders ever stick or seize up? Can I remove it from the side of the diff and see if it moves freely? What else could it be? Any help is greatly appreciated.
     
    Chevyho, Nov 9, 2015
    Chevyho, Nov 9, 2015
    #1
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  3. Mar 7, 2016 #2
    melpromud

    melpromud Medium Load Member

    463
    114
    Jan 29, 2010
    camden ny
    0
    the full locker in the rear rear isn't locking?
     
    melpromud, Mar 7, 2016
    melpromud, Mar 7, 2016
    #2
  4. Mar 7, 2016 #3
    melpromud

    melpromud Medium Load Member

    463
    114
    Jan 29, 2010
    camden ny
    0
    id guess something in the actuator is messed up. jack the rear axle up. lock it n spin by hand. see if you can still hear or feel the clicking. sounds like its trying to lock but isn't engaging.
     
    melpromud, Mar 7, 2016
    melpromud, Mar 7, 2016
    #3
  5. Mar 7, 2016 #4
    AModelCat

    AModelCat Road Train Member

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    158,964
    Jul 7, 2015
    Canuckistan
    0
    Someone could have engaged it while spinning and tore the dog teeth off the sliding clutch. Or it could be an actuator issue. More than likely if you're hearing the ticking its the sound of damaged or rounded off teeth slipping.
     
    AModelCat, Mar 7, 2016
    AModelCat, Mar 7, 2016
    #4
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