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Clutch Question

Discussion in '456/550/575' started by luca's308gts, Dec 11, 2017.

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  1. luca's308gts

    luca's308gts Karting

    Dec 16, 2016
    86
    Minneapolis
    Full Name:
    Bill
    #1 luca's308gts, Dec 11, 2017
    I've got a '98 550, 22,000 miles - runs perfectly, however occasionally I notice a pulsing from the clutch as I release the peddle. This happens with moderately aggressive driving shifting from 3rd to 4th and 4th to 5th.
    Aside from that the clutch seems good, good bite, no slippage, good peddle feel... All I can think of is an out-of-round on the clutch disk or the fly wheel. So is this a problem that needs immediate attention or something to ignore until some major service requires getting into this area?
     
  2. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,166
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #2 tazandjan, Dec 11, 2017
    Sounds like the system needs to be bled. Might as well change the fluid while doing it.
     
  3. luca's308gts

    luca's308gts Karting

    Dec 16, 2016
    86
    Minneapolis
    Full Name:
    Bill
    #3 luca's308gts, Dec 11, 2017
    Thanks, I expected a more involved fix
     
  4. asgor

    asgor Formula Junior

    Sep 8, 2016
    715
    Virginia, USA
    #4 asgor, Dec 11, 2017
    Speaking of the (manual transmission) clutch on the 456/550, I never read posts about the clutch needing replacement on these cars - whereas clutch replacements are all over the board with the V8s. It almost seems like a 360 can't go more than 20k miles on the same clutch assembly!

    Have I just missed the obvious or are clutches on this generation's V12s inherently robust? I know that most 456/550s aren't driven extensively but even Dean Halter's 456 that was recently sold on BAT with 80K (!) miles didn't list a clutch replacement in the "work done" laundry list of items.
     
  5. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,166
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #5 tazandjan, Dec 11, 2017
    Last edited: Dec 11, 2017
    The V12 clutches are tougher (and thicker) to handle the torque and V12 drivers tend to have more experience driving three pedals than V8 drivers. Obviously a statement that has many exceptions, but the V12 population tends to attract drivers very familiar with three pedals, even those driving F1 575s. The 360 and F430 population is also largely made up of F1 shift systems, 70% 360s and likely 85-90% F430s, and uneducated use of F1 will tend to wear the clutch more rapidly. More of our V12s are 3 pedal by total proportion.
     

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