Chapter Three /Gearbox Oil Change on the 308 GT4 | Page 2 | FerrariChat

Chapter Three /Gearbox Oil Change on the 308 GT4

Discussion in 'Technical Q&A' started by robertgarven, Sep 6, 2006.

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  1. ragtop1

    ragtop1 F1 Veteran
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    Nov 11, 2006
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    Larry Warren
    #26 ragtop1, Mar 20, 2016
    Robert, Thank you for the tutorial. However, my manual says to use 4 quarts of gear oil. You have indicated 6. Please explain the extra 2 quarts. thanks. '79 308
     
  2. robertgarven

    robertgarven F1 Veteran
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    Feb 24, 2002
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    Robert Garven
    #27 robertgarven, Mar 21, 2016
    I just pour it in till it comes out the back hole then I shut it up and add I more quart. The high gears get starved for oil and it was a Ferrari tech who suggested it. I also run and extra quart in the engine to prevent starvation on corners 20+ years and no problems.... I am not an expert though...... just my 2 cents!
     
  3. Anthony bentley

    Anthony bentley Formula Junior

    May 20, 2006
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    Anthony Bentley
    #28 Anthony bentley, May 1, 2020
    Sorry to drag up an old thread is it GL4 or GL5 75-90 redline.
     
  4. waymar

    waymar Formula 3

    Sep 2, 2008
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    Wayne Martin
    #29 waymar, May 1, 2020
    In my 1982 308GTSi RedLine GL4 MTL. Many others will chime in .......
     
  5. GordonC

    GordonC F1 Rookie
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    Aug 28, 2005
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    Gordon
    #30 GordonC, May 3, 2020
    It is GL4 - there are no hypoid gears in the 308 transmission/differential unit. It's hypoid gears, like in a traditional differential, that require the EP extreme pressure additives in GL5.

    I tried the Redline 75W90/75W90NS mix that has been recommended here, then changed to Redline MTL as recommended by Rifledriver - I found it shifts better with MTL, a GL4 fluid.
     
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