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04-07-2019, 09:56 AM
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#1
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Senior Member
Join Date: Apr 2012
Location: Philadelphia, PA
Posts: 4,208
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E-van: which rear wheel is the drive wheel?
On a 2WD Ford Econoline without LSD, which wheel is the actual drive wheel? 2002 E250 5.4 3.73 rear
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04-07-2019, 10:14 AM
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#2
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Senior Member
Join Date: Feb 2014
Location: Santa Maria, CA
Posts: 586
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Both of them. Of course, once the wheel with the least traction breaks loose, all of the power will go to that one, resulting in a lack of forward drive.
https://youtu.be/yYAw79386WI
edit: I guess I don't know how to add a link, but the above youtube address is for a great video explanation of how a differential works.
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04-07-2019, 10:20 AM
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#3
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Senior Member
Join Date: Apr 2012
Location: Philadelphia, PA
Posts: 4,208
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Yeah, but isn’t one side the primary rear drive wheel?
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04-07-2019, 11:19 AM
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#4
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Senior Member
Join Date: Jan 2012
Location: Middle of Nevada
Posts: 302
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No. Equal traction = equal power going to each rear wheel. Wherever did you get the notion that there is a primary drive wheel???
__________________
Worshipper of Wild Country
2007 Quigley V-10 on 33s with 4.56 gears (Toyhauler)
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04-07-2019, 11:29 AM
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#5
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Senior Member
Join Date: Feb 2018
Location: Bozeman MT
Posts: 270
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As far as I was aware, there were really only three (popular)kinds of differentials- Open, limited slip, and locking. Don't think Ford would have made what was primarily a commercial truck with a locking rear diff, just wouldn't make sense. If it's not a LS Diff, then it's probably an open diff.
If you were to "pinch" one tire (give it traction, prevent it from moving), the other would spin because power is given to the wheel with least traction.
I've gotten "stuck" (Well, until I put it back in 4wd..) twice now in some really silly spots (Wet grass and an iced-over parking spot..) because the open diff is worthless on anything but dry, hard-road driving.
__________________
1997 Quigley E-250
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04-07-2019, 12:03 PM
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#6
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Senior Member
Join Date: Apr 2012
Location: Philadelphia, PA
Posts: 4,208
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Huh. Ok, well, now I know. I always thought with an open diff that one wheel was the primary drive wheel.
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04-07-2019, 01:12 PM
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#7
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Senior Member
Join Date: Jan 2009
Location: Corvallis, OR
Posts: 5,300
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The oldest explanation is still the best:
https://youtu.be/yYAw79386WI
__________________
2000 E450 dually V10 wagon
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04-07-2019, 02:45 PM
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#8
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Senior Member
Join Date: Mar 2015
Location: Maryland
Posts: 3,378
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Quote:
Originally Posted by carringb
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Elementary instruction at its finest. I like it! Background music in this video reminds me of the rare occasion we made it to the Movie Theater...back-in-the-day.
__________________
TwoXentrix
"AWOL"
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04-07-2019, 05:05 PM
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#9
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Senior Member
Join Date: Nov 2012
Location: boise idaho
Posts: 2,625
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Find someplace slick and romp on it. It will show you exactly which one breaks loose first. In my experience it’s almost always been the passenger rear when it’s just me in the vehicle. Unless it’s a fwd car, then it’s been the passenger front. Seems it’s pretty much always opposite of where my fatass is.
__________________
"understeer is when you hit the wall with the front of your car, oversteer is when you hit the wall with the rear of your car, horsepower is how hard your car hits the wall, and torque is how far your car moves the wall."
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04-10-2019, 11:45 PM
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#10
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Senior Member
Join Date: Sep 2018
Posts: 624
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I think that's where the idea of a "primary drive wheel" comes from -- on any given vehicle there's one tire that will tend to break loose first, so when you floor it that's the one that'll spin. It tends to come down to weight distribution and how the suspension winds up under power. But when both tires have grip they both get equal amounts of torque.
__________________
N8SRE
1990 E-250 Sportsmobile w/ penthouse top, converted when new by SMB Texas.
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