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Spicer 5 speed jumping out of 4th gear

Discussion in 'Large Equipment' started by racnruss, Dec 28, 2011.

  1. racnruss

    racnruss ArboristSite Member

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    Anyone with a Spicer 5 speed transmission have this problem? What is the fix?

    Mine is in a 2002 INT 4800
     
  2. UpperCanadaTree

    UpperCanadaTree ArboristSite Lurker

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    synchro is shot. gotta pull the tranny to fix it . depending on mileage, you might as well do the clutch at the same time . 2/3 of the expense is the re and re of the tranny.
     
  3. lxt

    lxt Addicted to ArboristSite

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    that is a common problem, detent spring may be weak? remember that being replaced on my bucket truck...however was a short fix lasted a couple months, I just held it in gear after that!!!




    LXT............
     
  4. powerking

    powerking AboristSite Guru

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    I'll second that...syncro is bad.....
     
  5. redneck51587

    redneck51587 ArboristSite Operative

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    Syncro is bad. Drum might be bent... Key may be broken. Either way the trans needs rebuilt.
     
  6. lxt

    lxt Addicted to ArboristSite

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    usually when a synchro goes its a PITA to get it to go in gear, didnt know that would cause shifter to pop? had a non-synchro 10 speed do the same..........? what would caused that?



    LXT...............
     
  7. OCTJ

    OCTJ ArboristSite Lurker

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    Sounds like the bearings are worn.
    Time for a rebuild.
    I would also have to guess that you should have a non-synchro tranny in that size truck.
     
    Last edited: Dec 28, 2011
  8. BDChainsaw

    BDChainsaw ArboristSite Lurker

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    gear jaming

    I would have to say worn gear face. I've driven many trucks like that. Mostly due to inexperienced drivers not knowing how to double clutch or down shift properly. Grinding the gears actually removes metal turning mating gears into cones that barely mesh so they pop out under load. Hold it as long as you can and save your milk money because it won't be cheap.
     
  9. racnruss

    racnruss ArboristSite Member

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    thanks for the replies. Not the greatest news though. Just bought the truck and didn't notice on the test drive because I wasn'
    t in 4th gear very long. Now that I'm home, 4th gear is the main gear for around town driving 25-40 mph. Goes in easy and doesn't vibrate or jump out violently, it just falls out when cruising without much load on the throttle.

    Sure wish more of these trucks had Allison autos. All the gear jamming from multiple drivers is probably hard on the manuals.

    2002 INT 4800 4x4 DT466 rear mount Altec LRV
     

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