F-40 gearbox | FerrariChat

F-40 gearbox

Discussion in '288GTO/F40/F50/Enzo/LaFerrari/F80' started by Dr_ferrari, Sep 10, 2009.

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  1. Dr_ferrari

    Dr_ferrari Formula 3 Consultant Professional Ferrari Technician

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    Last edited by a moderator: Sep 7, 2017
    Dr_ferrari, Sep 10, 2009
    #1
  2. Dr_ferrari

    Dr_ferrari Formula 3 Consultant Professional Ferrari Technician

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    Disassembled and inspected all the componets. found only the 2nd gear set and the drop gear set damaged. believe it or not, no damage to any of the other gears.

    The synchros were worn as we expected. so we ordered all replacement parts, new Carobu drop gear set, new aluminum case for the dropgears that was damaged, and replacement of all bearings, synchros, synchro collars, and seals. changed the t/o bearing and seals as a precaution.
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    Last edited by a moderator: Sep 7, 2017
    Dr_ferrari, Sep 10, 2009
    #2
  3. TimF40

    TimF40 Formula 3

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    Wow, bad problem, great pictures. Was the gearbox original (never opened)? e.g., did it have aftermarket drop gears or other? I assume the "4 days" were of hard track time. - Tim
     
    TimF40, Sep 10, 2009
    #3
  4. Dr_ferrari

    Dr_ferrari Formula 3 Consultant Professional Ferrari Technician

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    Last edited by a moderator: Sep 7, 2017
    Dr_ferrari, Sep 10, 2009
    #4
  5. Dr_ferrari

    Dr_ferrari Formula 3 Consultant Professional Ferrari Technician

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    Gearbox was never opened, in the cars earlier days I believe the drop gear set was installed but it appears nothing was done to the gearbox.
     
    Dr_ferrari, Sep 10, 2009
    #5
  6. Dr_ferrari

    Dr_ferrari Formula 3 Consultant Professional Ferrari Technician

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    Last edited by a moderator: Sep 7, 2017
    Dr_ferrari, Sep 10, 2009
    #6
  7. Dr_ferrari

    Dr_ferrari Formula 3 Consultant Professional Ferrari Technician

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    About 3 weeks ago we took the car out to the FCA event at the new Montecello track.

    Car ran Flawless and we were very happy with the results as was the client.
     
    Dr_ferrari, Sep 10, 2009
    #7
  8. Dr_ferrari

    Dr_ferrari Formula 3 Consultant Professional Ferrari Technician

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    Last edited by a moderator: Sep 7, 2017
    Dr_ferrari, Sep 10, 2009
    #8
  9. Blown Z

    Blown Z Formula Junior

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    Looks great! What wheels are on the car?
     
    Blown Z, Sep 10, 2009
    #9
  10. Dr_ferrari

    Dr_ferrari Formula 3 Consultant Professional Ferrari Technician

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    Custom 18" wheels made by Fiske to fit the Brembo GT-R brakes that were installed
     
    Dr_ferrari, Sep 10, 2009
    #10
  11. SSNISTR

    SSNISTR F1 Veteran

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    Beautiful car. And great work.
     
    SSNISTR, Sep 10, 2009
    #11
  12. rennspeed

    rennspeed Formula Junior BANNED

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    +1

    and I love the license plate!
     
    rennspeed, Sep 10, 2009
    #12
  13. Napolis

    Napolis Three Time F1 World Champ Honorary Owner

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    Nice Work!
     
    Napolis, Sep 10, 2009
    #13
  14. UConn Husky

    UConn Husky F1 Rookie

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    Great post! Hopefully someday I'll be able to have you take care of my F40 :D :D :D
     
    UConn Husky, Sep 11, 2009
    #14
  15. Scuderia-San-Antonio

    Scuderia-San-Antonio Formula 3

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    I have a complete gear box NOS if anyone is interested. :)
     
    Scuderia-San-Antonio, Sep 12, 2009
    #15
  16. 335s

    335s Formula Junior

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    What did the D&I reveal to you as the root cause?
    Based on the impact damage to teeth, I am guessing something "let go?"
    I have seen gear stack spacers "go away" and cause gear teeth to hit what they aren't suppossed to... with similalr looking(I stress LOOKING) results...

    On the post for the NOS box, I have a friend in Italy with a NOS: DOG RING F-40/288 box...for the "trackers" out there...Not cheap-but not crazy $ either...
     
    335s, Sep 20, 2009
    #16
  17. of2worlds

    of2worlds F1 World Champ Silver Subscribed

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    Were the wheels designed with that offset? Or is the wheel mounted with a spacer? Lots of great pictures of the 'nitty gritty' bits! Thanks
    CH
     
    of2worlds, Sep 20, 2009
    #17
  18. Dr_ferrari

    Dr_ferrari Formula 3 Consultant Professional Ferrari Technician

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    All spacers were in place. we determined that the second gear broke a tooth and that tooth destroyed the gearset completly. the dropgear set we felt was broken due to a broken part from the second gear set getting between the gears.

    We were amazed that none of the other gears were damaged aside of a little normal wear.


    As for the wheels, they were made with the offset, no spacers.

    Regards, Jim
     
    Dr_ferrari, Sep 20, 2009
    #18
  19. of2worlds

    of2worlds F1 World Champ Silver Subscribed

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    Manufactured with that offset; the wheels seem to fit perfectly using tho.se tires. The design of the wheel appears cleaner than the stock F40 wheel to. I am curious if the taller wheel tire combination has much effect on the overall gearing compared to the factory stock combination? Drop gears offset some of the loss, correct? Thanks
    CH
     
    of2worlds, Sep 20, 2009
    #19
  20. 246tasman

    246tasman Formula 3

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    I have sent you a PM
    Will
     
    246tasman, Sep 22, 2009
    #20
  21. redzone

    redzone Formula 3 Owner

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    The photos are incredible.What a great thread!
     
    redzone, Oct 4, 2009
    #21

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