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348 Possi Problem

Discussion in '348/355' started by rimoore, Dec 1, 2004.

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  1. rimoore

    rimoore Formula 3

    Nov 18, 2004
    1,353
    Island in Maine
    Full Name:
    Richard Moore
    #1 rimoore, Dec 1, 2004
    I have a 90 348TS at the Ferrari Dealer getting it's 30K service. The called me today and said that the possi isn't working although the car drives nice. Is this a normal problem? If it's common is there a average cost to fix it? I want to make sure they don't bend me over ;). I have a Ferrari mechanic friend who will have some time after the first of the year to work on any of the stuff that the dealer didn't do. i.e. non urgent items. Is this a show stopper where the car should not be driven until it's fixed?

    Thanks
    Rick
     
  2. 348SStb

    348SStb F1 Rookie
    Owner

    Apr 9, 2004
    2,991
    Palm Beach County, FL or Nassau County, NY
    Full Name:
    Dave
    #2 348SStb, Dec 1, 2004
    The WHAT isn't working?

    What's a possi? I don't believe that is a word.

    I'd like to help, but you must clarify.
     
  3. BigTex

    BigTex Seven Time F1 World Champ
    Owner Rossa Subscribed

    Dec 6, 2002
    79,368
    Houston, Texas
    Full Name:
    Bubba
    #3 BigTex, Dec 1, 2004
    When my possi quit working I divorced her.........:rolleyes:


    New one works great!
     
  4. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,776
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #4 Steve Magnusson, Dec 1, 2004
    Rick -- Not a 348er myself, but that "problem" (if it truly is just that the posi-traction clutches are worn out and slipping, but everything else in the differential/gearbox is OK) has not been widely reported here. To replace/rebuild the posi-traction components I believe requires removing the differential assembly from the gearbox so it's not a minor repair. IME, the general rule of thumb is that with labor intensive components (like gearboxes/diffs) it really doesn't make sense to do a fix until a real serious operational problem exists.

    If "possi isn't working" is taken literally (and normal driving is OK), the only symptom would be that you'd do 1-wheel burnouts instead of 2-wheel burnouts (but it could just be that the service writer is just not communicating well) -- did they explain how they determined "the possi isn't working"?

    PS Please add your F year/model/version and at least your location by continent to your Profile.
     
  5. rimoore

    rimoore Formula 3

    Nov 18, 2004
    1,353
    Island in Maine
    Full Name:
    Richard Moore
    #5 rimoore, Dec 1, 2004
    Thanks for the info. I visited with them today and they also agreed that that car was safe to drive. I asked about rebuilding the diff and they didn't know if the parts were available, so they quoted me the price of a new diff. They are going to look into whether the clutch packs can be purchased.
     
  6. rimoore

    rimoore Formula 3

    Nov 18, 2004
    1,353
    Island in Maine
    Full Name:
    Richard Moore
    #6 rimoore, Dec 1, 2004
    The service manager said they spun the wheels on the lift and saw that the posi was not working.
     
  7. tbakowsky

    tbakowsky F1 World Champ
    Consultant Professional Ferrari Technician

    Sep 18, 2002
    19,947
    The Cold North
    Full Name:
    Tom
    #7 tbakowsky, Dec 1, 2004
    How did they determine this?
     
  8. boxer frank

    boxer frank Karting

    Sep 30, 2004
    165
    toronto canada
    Full Name:
    FRANK
    #8 boxer frank, Dec 1, 2004
    very common
    half of the fcars on the road r driving around with worn(not working)
    posi (lsd= limited slip differentials) and the owners don't even know it!
    welcome to one wheel peel.lol
    i beleive your posi is a zf(german) diff and the clutches r avaliable
    but ferrari only sells as a unit
    keep us posted
     
  9. rimoore

    rimoore Formula 3

    Nov 18, 2004
    1,353
    Island in Maine
    Full Name:
    Richard Moore
    #9 rimoore, Dec 2, 2004
    Any idea who might have the parts?

    Thanks
    Rick
     
  10. Husker

    Husker F1 World Champ

    Dec 31, 2003
    11,792
    western hemisphere
    #10 Husker, Dec 2, 2004
    Did you mean "Posse" ? I didn't even know my 348 had one of those.
     
  11. boxer frank

    boxer frank Karting

    Sep 30, 2004
    165
    toronto canada
    Full Name:
    FRANK
    #11 boxer frank, Dec 2, 2004
    call zf
    i think they have a division in chicago
    or if u can get a pic or an old one u might be able to match it up
    at at bmw or benz parts jobber
     
  12. rimoore

    rimoore Formula 3

    Nov 18, 2004
    1,353
    Island in Maine
    Full Name:
    Richard Moore
    #12 rimoore, Dec 2, 2004
    Thanks for all the assistance.
     

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