4x4 or 4x3

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Old 11-24-2003, 10:22 PM
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4x4 or 4x3

This is just something I thought of. I've never owned a 4x4.

If you do not have a limited slip differential on the rear, that means only one rear tire has power at any given time. Well, if you have 4wd, how does that other rear wheel get power?

I was under the impression that the transfer case only allowed the transfer of power to the front 2 wheels.
 
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Old 11-25-2003, 12:01 AM
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deep6blue,

If you truck is stock, and you don't have a limited slip rear differential, only one wheel gets power. The front axle on F-150's has an open differential, only one wheel gets power, so really you have a 4x2. The transfer case provides power to both axles, the differential decides which wheels get it from there.

With a limited slip differential, it provides power to only one wheel unless the drive wheel starts rotating faster than the other. Then it gives a percentage of it's power, up to about 40% or 50% (it varies based on manufacturer) to the other wheel until the uneven rotation stops. A locking differential gives 100% to both wheels if one wheel start rotating faster than the other, this is great off-road, but very bad on dry pavement. Because when you turn a corner one wheel always rotates faster than the other.
 

Last edited by rkjerue; 11-25-2003 at 12:13 AM.
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Old 11-26-2003, 02:30 PM
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rkjerue - Thanks for the clarification. That really sucks to think that some of these 4wd vehicles are not actually 4x4. Short of a posi-track (brings back memories) rearend, only one wheel really has power in the back.
 
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Old 11-26-2003, 03:20 PM
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Works like this:

4x2 regual axle has 4x1
4x2 LS axle has 4x1.5
4x4 regular axle has 4x2
4x4 LS axle has 4x2.5
4x4 AWD SUV has 4x1
 
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Old 11-26-2003, 05:12 PM
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Originally posted by greencrew
Works like this:

4x2 regual axle has 4x1
4x2 LS axle has 4x1.5
4x4 regular axle has 4x2
4x4 LS axle has 4x2.5
4x4 AWD SUV has 4x1
Huh???
 
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Old 11-26-2003, 05:19 PM
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Actually AWD vehicles really are 4 wd Sending power to the wheel that slips so if there all slipping there all getting power

So I am glad i spent the extra money on a 2 wd off road truck
 
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Old 11-26-2003, 11:47 PM
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Originally posted by Weezell
Huh???
There's no limited slip in the front, and the LS in the rear only transfers half the power to the slipping wheel.
 
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Old 11-27-2003, 12:06 AM
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Originally posted by Beardoge
Actually AWD vehicles really are 4 wd Sending power to the wheel that slips so if there all slipping there all getting power
I was hunting in SD two weeks ago in a Yukon with this option. It had two 4x4 modes, one was AWD (power to the wheel that slips,) and the other was full time 4x4. We traveled down some rough wet roads, and I wasn't sure which one is better, but I picked full time.

I don't think I want this technology on my truck.

We had a little talk going on out there. We had two trucks, the other was an 02 F-150 FX4 SCab. The F-150 drive looked down a rough road, and said to the Yukon driver: "That's a good spot, but we can't drive it today, you'll neve make it." The Yukon driver wasn't going to take that and I thougt we were going to be headed down that road for sure. Never did though.

I suppose it's a good thing, as the F-150 driver was talking from experience, and the Yukon driver didn't know any better. Main point being the Yukon didn't have the clearance.
 



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