Help with 308 clutch Service Bulletin | FerrariChat

Help with 308 clutch Service Bulletin

Discussion in '308/328' started by DIY, Jan 16, 2023.

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  1. DIY

    DIY Rookie
    Silver Subscribed

    Nov 6, 2012
    31
    Ann Arbor, MI
    Full Name:
    Larry Webster
    Hi,

    I am restoring a ‘75 Dino. Clutch pedal is heavier than I like and on this forum I found the 1981 Ferrari factory service procedure that is supposed to lighten the effort.

    I’d like to try it. Has anyone recently performed this upgrade? Specifically, where can I get the parts?

    Any help appreciated!
    Thanks
    Larry
     
  2. BigTex

    BigTex Seven Time F1 World Champ
    Owner Rossa Subscribed

    Dec 6, 2002
    79,310
    Houston, Texas
    Full Name:
    Bubba
    I have all the Tech bulletins thru '81, but it's a huge pile.

    Maybe someone can search it digitally....

    You've done the obvious like lubricate pivots point and inspect/lube the cable
     
  3. DIY

    DIY Rookie
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    Nov 6, 2012
    31
    Ann Arbor, MI
    Full Name:
    Larry Webster
    Oh I have the bulletin, thank you, which has the parts list and instructions. I'm just curious where the parts came from and anything else I should know before starting.

    Yeah, I freed everything up and replaced the cable. Clutch is workable, but if I can improve it, I will.
     
  4. miketuason

    miketuason F1 World Champ
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    Feb 24, 2006
    15,727
    Cerritos, CA.
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    Mike
  5. bl10

    bl10 Formula Junior

    Jun 8, 2011
    430
    Chatsworth, CA
    Full Name:
    Barry Leavengood
    Have you tried adjusting the goofy over center spring clutch mechanism. The manual has a very detailed write up on it. I believe you can also adjust the over center spring tension. Adjusting the over center angle per the manual reduced the clutch effort on my 78 somewhat. The bulletin Mike so kindly put up looks pretty involved if you really do have to change the clutch sleeve. Assuming you can get the parts. The whole thing probably just increases the leverage by increasing the clutch petal travel for the same clutch movement.. Something else I did was adjust the clutch linkage so there is less free play at the top. On mine at least there is plenty of throw. This doesn't decrease the stiffness but means you don't have to depress it as far for full release and on mine made the shifting much smoother..
     
  6. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    36,564
    Cowboy Capitol of the World
    Full Name:
    Brian Crall
    I do not believe the parts are still available, or have been for years for that matter. I could be wrong.

    The biggest enemy to clutch effort in the V8 cars is so many over the years have installed V12 clutches in them in a misguided attempt at a better clutch life or better clutch or similar stupidity. Make sure you have a V8 clutch.
     
    waymar likes this.
  7. Dr Tommy Cosgrove

    Dr Tommy Cosgrove Three Time F1 World Champ
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    May 4, 2001
    36,156
    Birmingham, AL
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    Tommy
    This ^

    Even using one 4-5X a year at car club track events, if you know the right way to operate a clutch, the (correct V8) clutch will easily last 100,000 miles.

    Guess how I know
     
  8. ragtop1

    ragtop1 F1 Veteran
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    Nov 11, 2006
    5,187
    Ontario
    Full Name:
    Larry Warren
    JuLiTrO likes this.

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