Question about 2003 Lincoln Navigator

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4 Wheel High speed limit

I have a 2003 Navigator what speed is safe to drive in 4 Wheel high?

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The owners manual should state, but you should be safe at speeds up to 45. I have a Tahoe and have driven in slush and snow up to the speed limit on highway. 4 Low should be on off road terrain only, you can cause serious damage if you drive in 4 low on pavement.

Posted on Jan 11, 2009

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Why does my 4 wheel drive not work all the time?


Elaine,

not work, do tell what makes you think it dont work (a lamp) or tires slipping or dead tires. (by tires mean that and traction)??????????

what mode fails, of the many, and where.???????



first off, we dont know what your tires are touching.

on road, or off road. pavement or ICE or snow.

that matters big time . (you read manual and match MODE to Road)

your lost operators guide explains all that, right?

eg: how and when to use, 4wd, its all there. I promise.

ControlTrac 4-wheel-drive system



here are the mode. which one , gives you problems.



quote ford with comments.



What are the modes, and how do they differ?

(note this is the operational behavior of a 2008 Ford Expedition. Newer and older Expeditions will vary only slightly)



2H 2-wheel-drive with high range gearing (1.00:1) Rear-wheel-drive capability,

2-wheel electronic traction control system is enabled



4A 4-wheel-drive Auto with high range gearing (1.00:1) Full-time all-wheel-drive capability, ((best on pavement or any time)

Electronically adjusted torque split to front & rear wheels, Electronically variable center differential,

Front driveshaft & rear primary driveshaft allowed rotational speed difference,

4-wheel electronic traction control system is enabled



4H 4-wheel-drive with high range gearing (1.00:1) Part-time 4-wheel-drive capability, (not for dry pavement EVER)

Continuous 50/50 torque split to front & rear wheels, Electronically locked center differential,

Front driveshaft & rear primary driveshaft mechanically locked with no rotational speed difference,

4-wheel electronic traction control system is enabled



4L 4-wheel-drive with low range gearing (2.64:1) Part-time 4-wheel-drive capability, (off road usage, mostly)

Continuous 50/50 torque split to front & rear wheels, Electronically locked center differential,

Front driveshaft & rear primary driveshaft mechanically locked with no rotational speed difference,

4-wheel electronic traction control system is enabled, ESC and RSC are disabled



In 4A mode the center differential is electronically-controlled and rear drive wheel bias. The on-board computer monitors for any sign of rear drive wheel slip (loss of traction)

If loss of traction is detected, the center differential is told to send a share of the engine\'s torque to the front drive wheels. It will not let the front driveshaft turn at the same speed as the rear driveshaft.



What about traction management?

1997-2002 model Ford Expeditions offered an optional limited-slip rear differential (LSD). A conventional open rear differential was standard along with the conventional open front differential and the electronic locking center differential.

comment with out LSD, one tire can spin, on say ice.

but the other 3 tires dont, in full time.

Jul 04, 2014 | 2003 Ford Expedition

1 Answer

I have a exesive consume of gas in my 2003 lincoln navigator any idea why?


low compression - load --speed --timing -tyre pressure - (auto )-transmission not selecting over drive- blocked exhaust- add on bits (roof rack etc)-dragging brakes--hand brake not off properly- wheel alignment- plugs -high tension leads touching each other----just to think of a few, so take your pick

Nov 19, 2013 | 1999 Lincoln Navigator

1 Answer

Why doesn't my 4 wheel low engage, seems like it goes back to two wheel drive. 4 high work good but turning switch to 4 low turns off 4 wheel, could it be electrical or something else. Any help is...


there is a max speed limit to engage and use 4 wheel low. try to engage while rolling 5mph and do not exceed 20mph in this "power" gear. also make sure the all drive components are well greased. lack of grease throws off drive alignment and may not easily engage.

Oct 22, 2013 | 1999 Ford Explorer

1 Answer

Stuck in 4 wheel drive low


is the 4wd light on if not go in reverce for 20 30 feet then if idoesnt work then it might be the plunger on the front axel make sure your contacts are clean

Oct 14, 2013 | 2003 Lincoln Navigator

2 Answers

What gear should i drive in snow and ice


Depends, do you have 4 wheel drive? If so you can just use 4 wheel high, or if things get really slippery, use 4 wheel low and go slow, both in the drive position on the transmission shifter.

If 2wd, just use drive and go slow, again, if it gets slippery out, you can shift down in gears to go slower and to keep your speed slow.

If you're talking about snow and ice on just streets, then stick with 4 wheel high with 4x4, or "drive" in 2wd. You typically don't want to switch to 3,2, or 1st gear at highway speeds.

If you're playing in the snow, just use 4x4 high until you get stuck, then switch to 4 low to get out.

The only time I switch gears with the transmission (from drive to 3,2, or 1) is when I want to go really slow and keep it there. However, when I "play" in the snow, it's Drive only.

Does this answer your question? If not, let me know! Thanks

Jan 11, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

Not stable in high speed


it is an SUV, meaning it is top heavy compared with lower slung vehicles, if you are driving at high speed you are asking for a tip and roll and roll. please do this type of driving all by yourself, and limit the number of fatalities. google and read the sorry stories about the early Ford explorer II. I would however, also get a good 4 wheel alignment done and replace the all worn suspension components on this 11 year old vehicle.

Nov 18, 2010 | 1999 Suzuki Grand Vitara

1 Answer

My 1998 navigator 4 wheel drive got stuck& now ac wont work


2 different electrical circut's that are unrelated. Ac on a 12 year old truck is bound to need some service. Take it to a trusted shop that is not hurting for work & ask them if anything is disconnected, ie: compressor power wire, high pressure switch...ect. Tell tale sign system is low on freon is the compressor keeps cycling on & off with a clicking sound or compressor does not come on at all.

Mar 20, 2010 | 1998 Lincoln Navigator

2 Answers

Just got H 2 2005 4 buttons 4 the 4 wheel drive


Use 2 wheels, the other 4wd low ,for climbing at slow speeds: 4wd high, for driving on low traction roads,like mud or snow,at medium speeds: 4wd auto full time all wheel drive, for highway speeds on slippery surfaces, like rain or light snow.

Jan 12, 2010 | 2005 Hummer H2

1 Answer

2003 Lincoln Navigator will not shift from all 4wheel drive into 2wheel drive


this is common on these trucks just put your witch in 2 wheel and go ahead and drive it will let loos when it sees the correct secquence and drive a little and shift to netural.
just neve do it from high to low range

Sep 18, 2008 | 2003 Lincoln Navigator

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