Fld classic cracked flywheel housing

Discussion in 'Freightliner Forum' started by Fld4554, Apr 26, 2022.

  1. Fld4554

    Fld4554 Bobtail Member

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    Apr 26, 2022
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    I have a 98 fld classic day cab n14 celect plus 10 speed transmission.

    it has a really bad vibration, i can feel it start at 20 mph, and feels really rough around 50-70 mph (whole cab shakes) and has cracked 3 flywheel housings.

    i have replaced u joints, and driveshaft.
    Damper was wobbling so i replaced with used, doesn’t wobble anymore.
    Mechanic told me motor mounts seem good and tight, ride height a little off but not too much. Any idea what could be causing this? TIA
     
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  3. JohnnyC

    JohnnyC Light Load Member

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    Shot in the dark, drive shaft angle?
     
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  4. bad-luck

    bad-luck Road Train Member

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    I was always told that a vibration between 20 and 40 mph is a tell tale sign of a drive line problem. Check tires and rears. Then double check the entire drive line.
     
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  5. BoxCarKidd

    BoxCarKidd Road Train Member

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    Knock all four axles out. Lock the power divider in and spin it up. Does it have a vibration?
     
  6. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Do you have a pic? Where does the crack start?
     
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  7. Catmando

    Catmando Road Train Member

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    Take this for what it's worth I have a friend that has a FLD think it's a 96 with a N-14.. he broke countless bell housing bolts and cracked out 2 bell housing ... then finally figured out it was the power divider causing the problem
     
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  8. Fld4554

    Fld4554 Bobtail Member

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    Apr 26, 2022
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    It’s cracked on the passenger side going up& down. It has cracked in the same spot on all housings.
     

    Attached Files:

    Last edited: Apr 28, 2022
  9. Fld4554

    Fld4554 Bobtail Member

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    Apr 26, 2022
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    How can i find out if that’s the problem with mine?
     
  10. Fld4554

    Fld4554 Bobtail Member

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    Apr 26, 2022
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    Do you mean by putting them on jack stands? I tried with axles on ground and driveline off but without power divider, no vibration. I’m taking both drivelines today to get rebalanced.
     
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  11. Catmando

    Catmando Road Train Member

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    That's a good place to start keep us updated
     
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