99 kenworth w900 won't move unless power divider engaged.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by n1xrf, Feb 28, 2016.

  1. n1xrf

    n1xrf Light Load Member

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    Jul 18, 2011
    somewhere in the USA
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    I have a 99 Kenworth w900 with ds404 axles. We had one of our drivers move the truck around the yard and managed to get it stuck. Since then the only way to get it to move it to lock the power divider in. With it disengaged you can watch the driveshaft from the transmission to the front drive turn but with no drive wheels turn. If you lock it it the front axle will now drive. What could my problem be? I already foresee that I will have to pull the power divider, and possibly the front carrier. Any help before I tear into this is much appreciated.
     
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  3. gunner76

    gunner76 Medium Load Member

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    Mar 11, 2010
    IA
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    Did the driver spin the wheels a lot without the power divider locked in and did you hear an noises that were out of the ordinary? Unlocked, does the driveshaft to the rear diff spin and not put power to the wheels or do you not have any movement past the front diff?
     
  4. CasanovaCruiser

    CasanovaCruiser Road Train Member

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    Indiana
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    I can't imagine the front diff being completely blown that badly but it's the only thing that comes to my mind
     
  5. TampaTony

    TampaTony Medium Load Member

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    You have blown out the rear end, probably the front.
     
  6. joe016

    joe016 Light Load Member

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    Jan 23, 2016
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    Yup just like Tampa say rear end out did he engage the lock when it was spinning.
     
  7. IH Truck Guy

    IH Truck Guy Road Train Member

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    Purgatory
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    Or you snapped a axle shafts .
     
  8. ODR

    ODR Light Load Member

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    Sep 30, 2013
    Tompkins, Sk
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    I suspect the back diff. Drop a little oil out each and that will tell you where the problem is
     
    areelius Thanks this.
  9. wore out

    wore out Numbered Classic

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    CHASIN THE DEVIL'S HERD
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    I am putting my money on a broke axle.
     
  10. AModelCat

    AModelCat Road Train Member

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    Canuckistan
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    +1
    Either that or something in the front drive axles is toasted. Does the truck have diff locks? If so, lock in the front drive axle only. If it moves, broken/damaged axle. If not, the differential itself is damaged. If you have no diff lock for the front axle, the only way to know for sure what's toast is to start pulling the axle shafts. If they're good, you'll have to pull the diff.

    Edit: when the shaft from the transmission turns and the truck doesn't move, does the inter axle shaft turn or not? If it does, rear drive axle, if not, the problem is in the front drive axle.
     
  11. strollinruss

    strollinruss Road Train Member

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    Jun 5, 2012
    Montgomery, TX
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    That's what I was gonna say. Probably an axle. Easy fix.
     
    Bean Jr. Thanks this.
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