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Transfer case fill plug

Discussion in '308/328' started by DanishCarnut, Mar 12, 2020.

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  1. DanishCarnut

    DanishCarnut Rookie

    Dec 11, 2018
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    Heine Hansen
    #1 DanishCarnut, Mar 12, 2020
    Last edited: Mar 12, 2020
    I have purchased 5 cans of RedLine oil for my gearbox/transfer case and will be changing it this weekend. But..... Seems like I have 2 plugs in my transfercase.
    Witch one will I have to remove to fill my gearbox/transfercase ?
    I have a 22mm wrench plug and a 10mm Allen wrench plug side by side.
    See the first attached picture, compared to the pictures (second attached picture) from this great thread about changing gear oil. It says remove the 22mm plug, but seems like I have the 10mm Allen wrench plug located there ?

    It's a 1978 Euro GTB

    https://www.ferrarichat.com/forum/threads/chapter-three-gearbox-oil-change-on-the-308-gt4.120201/
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  2. DanishCarnut

    DanishCarnut Rookie

    Dec 11, 2018
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    Heine Hansen
    #2 DanishCarnut, Mar 12, 2020
    Seems like other transfer cases only have one fill plug - So why do I have two ?
    Anyone that have a picture of the transfercase from the top like my picture #1 shows ?
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  3. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
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    30°30'40" N 97°35'41" W (Texas)
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    Steve Magnusson
    #3 Steve Magnusson, Mar 12, 2020
    Don't know this for sure, but your transfer gear housing looks somewhat "thicker" than stock. There are aftermarket kits that replace the three stock transfer gears with four to change the ratio, and I think some of those might use a thicker (and different) housing:

    4 helical transfer gears
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    4 straight-cut transfer gears
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    Just a thought that you might have something aftermarket -- have you ever looked inside?
     
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  4. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,100
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    Brian Crall
    #4 Rifledriver, Mar 12, 2020
    You're right, it does.

    Factory made those by the way. Very hard to find a factory set these days.
     
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  5. DanishCarnut

    DanishCarnut Rookie

    Dec 11, 2018
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    Heine Hansen
    #5 DanishCarnut, Mar 13, 2020
    That might be what's going on here. I don't know what is behind the cover, though.

    Thanks for Your input [emoji869]
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