95 FLD S60 11.1 Vibration maybe??

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jsnap, Aug 18, 2015.

  1. jsnap

    jsnap Light Load Member

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    Apr 10, 2008
    ststen island NY
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    Hi all and thanks again for all help... OK here is the deal i have a 95 fld with an 11.1 and when the engine makes power and pulls i get like i wanna say vibration but it isnt its more like a rough roar that you feel in the whole truck... This happens only when its pulling and making power and torque.. If i take the RPMS up in neutral its smooth as can be or lets say shes pulling a hill and the fuel comes on here comes the roughness soon as you crest the hill and it cruising its smooth only when making power... Any Ideas???
     
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  3. AModelCat

    AModelCat Road Train Member

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    Could it be exhaust drone maybe? The engine tone typically changes as you load up an engine vs. reving it under no load.
     
  4. jsnap

    jsnap Light Load Member

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    Apr 10, 2008
    ststen island NY
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    No this is no drone its just more of kinda like when your lugging but your not lugging real rough..Would a damper do this??
     
  5. lots of character

    lots of character Road Train Member

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    Aug 12, 2015
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    Yes ^

    Is it a mild vibration? Ujoints maybe??

    I think you're closer with the damper
     
  6. OldHasBeen

    OldHasBeen Road Train Member

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    Once years ago I had trouble something like that with a Cummins engine. I told the mechanic that the bell housing was loose, they did not believe me and would do nothing about it and would not check it out. Just a few weeks later they had to put a brand new bell housing on it, the down pins and bolt holes were wallowed out.
     
  7. 062

    062 Road Train Member

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    Motor mounts,possibly cab mounts. If it's a high speed vibration driveline.
     
  8. GrapeApe

    GrapeApe Road Train Member

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    Check all mounts, U-joints and ride height. If you don't know the history, I'd change the damper, it's probably way overdue.
     
    lots of character Thanks this.
  9. jsnap

    jsnap Light Load Member

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    Apr 10, 2008
    ststen island NY
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    Whats actually involved in replacing the damper on a s60 is there a puller involved or do pulleys and damper slide off after the bolts are out???
     
  10. BoxCarKidd

    BoxCarKidd Road Train Member

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    Possibly clutch slipping under maximum load. Does pedal have free play? Do visual, smell, and heat inspection through the the bottom inspection plate when you come in off the road.
     
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