Lincoln all wheel drive explained

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Lincoln

Navigator Generation I 1998-2002 - 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. The same system is used on Ford Expedition. Optional locking rear differential.

Navigator Generation II 2003-2006 - ?

Navigator Generation III 2007-... - selectable all wheel drive (2H - Auto4wd - 4H), no low range. In the Auto4wd mode the behaviour is similar to the automatic all wheel drive - normally a rear-wheel drive vehicle, torque transfer to the front when needed.

"The Borg-Warner 1-speed torque-on-demand transfer case is a 2-piece magnesium design. The transfer case transfers engine power from the transmission to the front and rear axles. Under normal driving conditions, the unit is in All-Wheel Drive (AWD), but when desired, the operator may shift into 4x4 high (4H). The operator can switch between 2-Wheel Drive (2WD), AWD and Four-Wheel Drive (4WD) HIGH mode at any speed. The transfer case is equipped with an internal electromagnetic clutch and is shifted electronically. In AWD, the 4X4 control module varies the torque split between front and rear drivelines by controlling the transfer case clutch. Under most conditions, the 4X4 control module activates the transfer case clutch at a minimum duty cycle (percentage of time the clutch is turned on) which allows for a slight speed difference between the front and rear drivelines which normally occurs when negotiating a corner on dry pavement. When the rear wheels are overpowered, the 4X4 control module detects this slip condition and the duty cycle to the transfer case clutch is increased until the speed difference between front and rear drivelines is reduced. In this manner, the 4X4 control module can redirect engine torque to the front wheels when the rear wheels lose traction, yet still allow operation in the AWD mode on dry pavement. The unit is lubricated by a positive displacement fluid pump that channels fluid flow through holes in the rear output shaft." Source: http://www.justanswer.com/questions/22909-2008-lincoln-navigator-4x4

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

Last updated: 2010-06-25 15:30

There are 2 comments

larry

April 28, 2009 - 11:42

Subject: low range lincoln 2008 navigator

how can I get 2008 lincoln navigator to go into 4x4 low range? 4wd selection is only "auto" or "4x4" with no selection for low. Do I have to sell this and buy and expedition that has 4x4 low range selection?

Reply to larry

awd.ee

January 17, 2010 - 00:04

Subject: Re: low range lincoln 2008 navigator

It appears that 2008 Navigator does not have low range.