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Changing the Clutch on a 308gt4

Discussion in 'Technical Q&A' started by Tomasoshea, Aug 29, 2004.

  1. Tomasoshea

    Tomasoshea Rookie

    Aug 29, 2004
    12
    Ireland
    Full Name:
    Tom O'Shea
    Hi, I have a 79 308gt4, recently the clutch is slipping in 4th and 5th when I accelerate from low speed (too much torque not enough grip!), I assume this is a clutch near the end of its life and/ or possibly a leak in the seal between the gearbox and the clutch resulting in a "wet" clutch.

    I am looking for a comprehensive procedure on how to change the clutch on a 308 engine and a list of recommended parts to change when I am in there anyway.

    If anyone can help me I would appreciate it. Any documents/ procedures can be sent to tn_oshea@ftnetwork.com

    Thanks again!
     
  2. Dom

    Dom F1 Veteran
    Rossa Subscribed Owner

    Nov 5, 2002
    7,795
    Southern California
    Full Name:
    Dom V.
    I wish I could help you, but I've never done this before. However, before you start, do you have copies of the shop manual and parts manual? I understand these are pretty valuable to have before doing something like this.

    You can get copies of these at http://www.dino308gt4.com/Ferrari/ in the downloads section.

    Also, can you please fill out your profile?

    Thanks,
    Dom
     
  3. Tomasoshea

    Tomasoshea Rookie

    Aug 29, 2004
    12
    Ireland
    Full Name:
    Tom O'Shea
    Thanks Dom I have the manuals, just looking for an ABC document if it exists. thanks anyway, I will fill out my profile
     
  4. Verell

    Verell F1 Veteran
    Consultant Owner

    May 5, 2001
    6,992
    Groton, MA
    Full Name:
    Verell Boaen
    This is a fairly good step-by step clutch replacement. While written for a newer 308, the Carb'd 308s clutch was identical to the 308GT4:

    http://www.camerafilters.com/ec/clutch.htm

    However, have you adjusted the clutch? The early (carb'd 308s & GT4s) clutches can start slipping due to wear that hasn't been regularly compensated for by clutch adjustments. Often simply re-adjusting the clutch linkage to compensate for the wear will stop the slipping. It's worth a try.

    The clutch adjustment procedure in the above post is WRONG tho.

    The 308 GT4 workshop manual has the correct procedure in some detail. Key is to setup the turnbuckle like link to the correct length as described in the manual. Once the link adjustment is done, it's unlikely that the end of the clutch cable will need adjusting unless the cable is starting to stretch(indicating imminant failure), or else someone has miss-adjusted the clutch cable.

    If you don't have the 308GT4 WSM, it's available in Steve Jenken's private document collection (see link below)

    ---------------------------------------------
    Here are some pointers to other online resources that you'll probably find useful:

    'Online Service Manual' - http://www.cameragear.com/ec/

    308 GTB Register TechTips - http://www.r-design.net/308/index_e.html

    Ferrari Club of America:Northwest Region Site: FerrariFAQ - http://www.ferrariclub.com/faq/
    (Click on Ferrari FAQ & scroll down)

    FerrariList.com:
    DIY and Mechnical information and instructions - http://www.ferrarilist.com/?query=docs&action=catlist&cat=5
    Forum: Technical/DIY - http://www.ferrarilist.com/forum/list.php?f=3
    Also the FerrariList archives are searchable.
    Another, quite new, forum is: http://www.*****************/

    Ferrari 308 FAQ - http://home.att.net/~ferrari/308faq1.htm

    Technical Articles and Writings by Tony Palladino - http://www.modena-motors.com/Technical%20Articles.htm

    SERVICE & PARTS MANUALS, SPECS & SERVICE BULLETINS:
    Private Ferrari Document Collection - http://ferrari.jenkins.org/books/

    PARTS SOURCES

    The most comprehensive parts sorce is Ferrari.uk. A couple of years ago the Ferrari factory shipped them 51 TONS of 308 parts, the remaining end of life inventory. If they don't have something, then you'll be lucky to find it anywhere else. In general their prices are a lot better than buying thru a local Ferrari dealer. They're a FerrariChat sponsor, but their online catalog is only accessable via Ferrari's owners club:
    www.owners.ferrari.com

    You'll have to register with the site. Once youre in the site, keep clicking the 'spare parts' menu items & gadgets until you finally get to ferrari.uk's catalog.

    Some great parts sources are:
    T.Rutlands - www.trutlands.com
    Sodacoms - www.sodacoms.com
    Dennis McCann - www.allferrariparts.com
    Italian Car Parts - www.italiancarparts.com

    This list is NOT comprehensive, but it will get you started.
    Search the old ferrarichat.com Tech Q&A archives for 'parts' and 'supplier':
    http://www.ferrarichat.com/discus/messages/112/112.html?1067658613
     
  5. robertgarven

    robertgarven F1 Veteran
    Rossa Subscribed Owner

    Feb 24, 2002
    5,082
    Ventura, California
    Full Name:
    Robert Garven
    hey if I did it, anyone can, I agree I would set the adjustment first. early 308 and gt4 clutches have freeplay later cars and ones converted to the sissy ;-)
    easy clutch setup do not and as the clutch wears the pedal moves up. I like the heavy clutch people always ask about my well developed left leg muscles at the gym! If you do it buy all new bearings while your at it and you need a special tool from Baum to take off the transfer gear nut!
     
  6. gerritv

    gerritv Formula 3

    Jun 18, 2001
    1,400
    St Catharines
    Full Name:
    Gerrit
    Hi
    http://dino308gt4.com (under downloads) has both the 308GT4 WSM and the Service Bulletins. You need to determine if the clutch modification was done before doing the adjustments. Some cars were modified to reduce the amount of pedal effort required.

    Gerrit
     
  7. Tomasoshea

    Tomasoshea Rookie

    Aug 29, 2004
    12
    Ireland
    Full Name:
    Tom O'Shea
    Wow,

    Don't think I could have got a better response from Ferrari!

    Thanks for all your help, will get to this over the next couple of weeks and let you know How I got on!
     

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