Bolt Torque, 330 GTC Differential | FerrariChat
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Bolt Torque, 330 GTC Differential

Discussion in 'Technical Q&A' started by Bob Zambelli, Aug 31, 2009.

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  1. Bob Zambelli

    Bob Zambelli F1 Rookie
    Silver Subscribed

    Nov 3, 2003
    3,673
    Manning, SC
    Full Name:
    Robert G. Zambelli
    #1 Bob Zambelli, Aug 31, 2009
    Can someone tell me the tightening torque for the bolts that attach the ring gear to the differential?

    I have a manual but I can't seem to locate the info - I probably overlooked it.

    It should be the same as the 275 and Daytona.

    Bob Z.
     
  2. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,288
    Cowboy Capitol of the World
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    Brian Crall
    #2 Rifledriver, Aug 31, 2009
    Daytona is 7.5KG
     
  3. Tinbender

    Tinbender Formula Junior
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    Mar 13, 2004
    327
    Raleigh,Lake Lure,NC
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    Terry W. Phillips
    #3 Tinbender, Aug 31, 2009
    Hi Bob,

    Do you have the shop manual? On page 84: Assembly of the differential... the second item states: Between the half-case and the cover, carefully install the ring gear and tighten the hexagonal bolts to 4 Kg. torgue, then secure them with annealed steel safety wire.

    The Daytona workshop manual states 7.5 KGg.

    It appears that the 275 workshop manual calls for 4 Kg. but it is stated in a different manner. Assembling the differential: 1- Mount on the keyholder cover, disposed in horizontal position, the ring gear provided with the two dowel pins. 2-Mount in the cover the inner drum with cam. 3-Slip keys in the key slots. 4-Introduce the outer drum with cam. 5-Mount the semi-differential case and tighten screws to 4 Kgm. torque. Secure with annealed wire.

    Good luck,
    Terry Phillips
     
  4. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,288
    Cowboy Capitol of the World
    Full Name:
    Brian Crall
    #4 Rifledriver, Aug 31, 2009
    Last edited: Aug 31, 2009
    I would not be surprised if Daytona and 330 have different ring gear bolts.

    They are drilled for safety wire but on ALL Ferrari ring gears I Locktite them.
     
  5. davehelms

    davehelms F1 Rookie

    Jan 3, 2004
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    Dave Helms
    #5 davehelms, Sep 1, 2009
    I have dealt with 3 different style bolts. The last GTC I did had a short head bolt with a flange and no holes and accepted the 7.5KG nicely. When in doubt follow an Engineers handbook referancing size and pitch as a cross check.
     

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