599 GTB F1 - "Clunk" between shifts.

Discussion in '612/599' started by 360modena2003, Jun 17, 2017.

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  1. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    1,462
    I've recently been in another 599 GTB and noticed that the shifts are much smoother than on mine.

    There is a noticeable "clunk" between the shifts, almost as if something would be hitting the car at the rear.

    Could this be the PIS needing adjustment? Clutch is new and car has less than 20k miles.

    Thank you.

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  2. tazandjan

    tazandjan Two Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    27,499
    Albuquerque, NM
    Full Name:
    Terry H Phillips
    I would have the F1 system serviced (fluid changed, system bled, SD3 check, PIS optimized) and see if that fixes her. Should be done every three years according to the maintenance schedule.
     
  3. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    1,462
    Fluid has already been changed and bled (manually), and no difference.

    The next step would seem is SD3 and PIS...

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  4. LightGuy

    LightGuy Two Time F1 World Champ
    Silver Subscribed

    Oct 4, 2004
    25,897
    Texas
    Full Name:
    David
    The dealer doesn't know ?!?!

    If the fluids have been changed sounds like a sensor problem.

    This is one of the reasons to dislike paddle shifters.
     
  5. Skidkid

    Skidkid F1 Rookie
    Rossa Subscribed Owner

    Aug 25, 2005
    4,648
    Campbell, CA
    Full Name:
    John Zornes
    Please! Let's not turn this into yet another F1/Manual threads. It adds no value to the OP.

    To the OP: "manual bleed" is a myth. There isn't an bleed screw for the F1 and you can't cycle the gears completely enough to bleed the system completely. You need an SD to do that job correctly. Having said that. Taz is right. You need to get this to someone who knows the system and can get it set up correctly for you. I find that a well set up F1 is VERY reliable; unfortunately, many just hack at it, don't know enough about the system, and just don't get it set up right. In your case, the PIS may be wrong, a sensor may be dirty, throwout bearing may be going bad (not disengage), there may be a clutch issue, there are a lot of potential causes.
     
  6. Redneck Slim

    Redneck Slim Formula Junior

    Mar 10, 2011
    271
    Palo Alto,CA,USA
    Full Name:
    Walt Kimball
    It is well known that paddle-shifter manuals were designed by Rube Goldberg when he was on one of his many acid trips. If you want simplicity,lower maintenance costs,and more driving enjoyment,get a stick.
     
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  8. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    1,462
    Well, I would need an additional (after trading mine in) 300,000$ to get a stick...I think I should manage to get my issue fixed for less than that :)

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  9. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    1,462
    ...or 50,000$ plus to do a proper F1 to manual conversion...

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  10. mello

    mello Formula 3
    Silver Subscribed

    Jul 12, 2013
    1,090
    California
    Full Name:
    Steve
    Just a wild guess... engine/transaxle mounts?
     
  11. tbakowsky

    tbakowsky F1 World Champ
    Professional Ferrari Technician Consultant

    Sep 18, 2002
    12,255
    The Cold North
    Full Name:
    Howie Felterbum
    Ding ding! Let's look there first shall we?
     
  12. mello

    mello Formula 3
    Silver Subscribed

    Jul 12, 2013
    1,090
    California
    Full Name:
    Steve
    If it is indeed the engine/transaxle mounts, get it taken care of right away and try not to drive the car. The twisting force can crack or weaken the aluminum welds.
     
  13. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    1,462
    Checked, all good. The problem is 100% from the clutch engaging/disengaging.

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  15. jorge da cruz

    jorge da cruz Karting

    Sep 4, 2015
    187
    Luanda Angola
    Full Name:
    Jorge Da Cruz
    Did you found a reason / cause ?

    I think mine is developing the same issue as yours...

    I Do not use it often only saw that happening late summer when i drive it for two weeks after being stored in the garage for almost one year..

    Jorge
     

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