- information on all makes and models of tractors
Tractors > New Holland > 6640

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

Page information:

Last update:April 4, 2015
Copyright:Copyright 2016 TractorData LLC
©2000-2016 - TractorData™. Notice: Every attempt is made to ensure the data listed is accurate. However, differences between sources, incomplete listings, errors, and data entry mistakes do occur. Consult official literature from the manufacturer before attempting any service or repair.