AWD vs 4WD Expedition
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AWD vs 4WD Expedition
I have a 1999 Expedition which I run in the AWD mode 99.5% of the time. In very bad winter weather I will turn it to 4WD. When I do this it acts like the brakes are on all the time and it plows when the wheels are turned (instead of turning). Is this common, what can I do to fix it?
Logistics Pro
Joined: Oct 2000
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From: All over Texas
Your truck has A4wd, 4hi and 4lo. The A4wd stands for "automatic 4-wheel drive" meaning you're in 2wd until the sensors sense slipping in the rear wheels. When this happens the front wheels are engaged and you'll be in 4-wheel drive until slippage is not detected any longer.
Steering is different in 2wd and 4wd, but if it seems abnormal or unsafe, you should have the system checked.
Steering is different in 2wd and 4wd, but if it seems abnormal or unsafe, you should have the system checked.
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If 4HI is used on a non-slippery surface, you will experience what you've described in spades. On slippery surfaces, the tires will slip and the sensation will lessen, but not go away. Any unusual sounds accompany the experience?
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Have you ever had a 4WD before this truck? If not, there is DEFINATELY a different 'feel' to the front end when 4X4 is engaged on the front end. I think what you are feeling is normal for a 4WD. When in AWD the front wheels are not being driven unless it senses the rear wheels slipping. Just for kicks you could go out on a snowy day in AWD and try to get the rears to slip. When the front wheels engage turn the wheel and see if it feels the same as when in 4HI.
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No kiddin'? I've never had a Jeep but had a few Fords and a Chevy Tahoe. To some extent, they all had that weird feel on the front end when turning hard in 4WD. Any strange whining or grinding noises? Is what you experienced different than before or have you not had the truck that long?
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From: Lamar, SC
You know now that he mentions Jeeps, I never noticed it until he said something comparing to Fords and Chevy, but when I lived up in the mountains I had a Explorer, and my friend had a jeep that I drove all the time, a Cherokee, and it did drive different than my Explorer in 4wd. But the Explorer would go up any snow/ice covered driveway that was out there, and the Jeep would kind of crab up (if you can imagine).
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I'v ehad it a couple of years and I don't think it's changed any. It just doesn't seem to want to go forward in 4WD, you have to persuade it with the accelerator pedal, especially at slower speeds like a parking lot.
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bassmas5
1997 - 2006 Expedition & Navigator
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Aug 14, 2017 05:42 AM
