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    New Holland 6640 - transmission

    New Holland 6640 tractor photo
    1996 - 1998   PowerStar 40 Series
    Utility tractor
    Previous model:Ford 6640
    Next model:New Holland TS100
    Series next:New Holland 7740
    Series back:New Holland 5640
    more New Holland 6640 specifications...

    Note: the New Holland model 6640 is the same as the Ford 6640. The following data is from the 6640 listing.


    Type:constant mesh
    Gears:8 forward and 2 reverse
    Clutch:dry disc
    Oil capacity:69.6 qts [65.9 L]
    Four gears (1-4), plus reverse, in two ranges (L/H). Optional creeper provided a third range. Tractor must be stopped and clutch used to shift gears or range. The eight-speed transmission was only used on the 6640S.
    Speeds:With 16.9-34 rear tires.
    6640 EconoShift constant mesh speeds


    Transmission:Dual Power
    Type:two-speed power shift
    Gears:16 forward and 4 reverse
    Clutch:dry disc
    Oil capacity:69.6 qts [65.9 L]
    Dual Power adds a two-speed power shift between direct drive and the lower Dual Power range to the basic eight-speed transmission. The Dual Power range is engaged by a switch on the dashboard. Dual Power was an option on the 6640S.
    Speeds:With 16.9-34 rear tires.
    6640 Dual Power two-speed power shift speeds


    Gears:12 forward and reverse
    Clutch:dry disc
    Four gears (1-4) in three ranges (L/M/H) with right-hand shuttle lever. Gear shifts are synchronized. Shifts between medium and high ranges are synchronized, but the tractor should be stopped to shift to or from low range. Sychronized shuttle shifting. The 12-speed SynchroShift was standard on the 6640 SL. Dual power was an option with the SynchroShift, turning it into a 24-speed transmission.
    Speeds:With 16.9-38 rear tires.
    6640 SynchroShift synchronized speeds


    Transmission:ElectroShift/Pulse Command
    Type:four-speed power shift
    Gears:16 forward and reverse
    Clutch:wet disc
    Oil capacity:64 qts [60.6 L]
    Four power shift gears arranged in two synchronized ratio groups (1-4 and 5-8). Two synchronized ranges (low/high) and right-hand shuttle. Clutch must be used to shift range or move between the lower (1-4) and higher (5-8) gear ratio groups. Push-button power shifting between the four gears in a ratio group. Push-button de-clutching on the shuttle lever allow shifting without the foot clutch. The 16 power shift was standard on the 6640 SLE.
    Speeds:With 16.9-38 rear tires.
    6640 ElectroShift/Pulse Command four-speed power shift speeds

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    Last update:April 4, 2015
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