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Ford USA

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All Wheel Drive: all wheel drive explained, differential, electronic differential lock (EDL), haldex, low range, proactive AWD, quattro evolutions, safety concerns, terrain response system, testdrive, Torque-vectoring AWD, torque split ratio, torsen, viscous coupling

Brands: 4motion, quattro, super select, xDrive

Videos: Diagonal spin test, electronic differential lock test, Viscous Coupling Test

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Recent changes

Expedition I 1997-2002, II 2003-2006, III 2007-... -

Two wheel drive standard, optional Ford's Control Trac selectable all wheel drive (2H - Auto4wd - 4H - 4L). In Auto4wd mode the behaviour is similar to the automatic all wheel drive - the vehicle is normally rear-wheel drive. Torque is transferred to the front axle via an electro-magnetic clutch when slipping occurs. In 4H mode the clutch is fully locked and the front and rear driveshafts turn at the same speed. Optional locking rear differential.

Figure: Ford Expedition (2003) vacuum-disconnected front hubs for 2wd mode (17KB)
ford-expedition-vacuum-disconnect.jpg

See http://en.wikipedia.org/wiki/Control_Trac

Have you seen a better description of Ford Usa Expedition I 1997-2002, Ii 2003-2006, Iii 2007-... - on the web? Please send us the link to or post it in a comment below!

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