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PostPosted: August 26, 2007, 8:50 pm 
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Joined: June 24, 2007, 6:04 pm
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I took some photos and measurements from the '94 Explorer axle I got just in case anyone wanted the information.
Drivers side from inside backing plate to center of pinion bolt is 27 3/4.
Passenger side from inside backing plate to center of pinion bolt is 23 3/4.
Inside backing plate to inside backing plate is 51 1/2 inches.
Outside of axle flange to the inside of backing plate is 3 3/4 inches.
The pinion sits off center a little over 1 1/2 inches roughly at the back off the car.
I haven't decided for sure whether I am going to use this diff, but the Haynes is a +2 design , so if I move the power train over an inch then I will only have a driveshaft deviation of 3/4 inch at the back opening of the car.
The engine is the 3.4 V6 so it is a torque motor not a high rpm engine, so at this point I do not see any universal durability problems with the angle presented with an engine that wont be over 5000 rpm's. I haven't done any calculations yet but the driveshaft should be long enough to compensate.
If not I will swap it for something else.
Al


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PostPosted: August 31, 2007, 3:45 pm 
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Joined: January 14, 2006, 1:06 pm
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Location: Vista (north of San Diego CA)
Did that axle come out of a 2WD or a 4WD Explorer?


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PostPosted: August 31, 2007, 11:28 pm 
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It was a 4wd, they had about 18 of them and there were no 2wd among them.
Al


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PostPosted: June 9, 2011, 1:19 pm 
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Joined: July 6, 2008, 12:48 am
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Location: Amador County, CA
Is this axle 5 lug?

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PostPosted: June 9, 2011, 1:49 pm 
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Joined: December 17, 2007, 1:17 pm
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Yeah, Explorers are 5x114.3mm


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PostPosted: June 9, 2011, 4:43 pm 
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Joined: August 19, 2006, 5:48 pm
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Location: S. Florida
It would be helpful to measure the axle with the brake drums in place and do what's called a wheel mounting surface (WMS) measurement. Then do a measurement from either WMS to the center of the pinion.

From a WMS measurement it will be easy for people to figure out where their tires/rims will be positioned in a chassis. Without the thickness of the brake drum/rotor you can't be sure where the rim is mounted in relation to the axle flange.

I have some axle width etc measurements on my website with a diagram that shows where I took measurements of several axles. I'd be happy to add any axles that people would like to measure.

http://dmr-architect.com/~locouki/widths-of-axles.html

For a stock "book" chassis it looks like the '79 to '92 ranger axle would be a good fit. The solid RX-7 also fits but there is a very limited ratio choice.

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PostPosted: June 9, 2011, 7:46 pm 
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Joined: June 24, 2007, 6:04 pm
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olrowdy_01 wrote:
It would be helpful to measure the axle with the brake drums in place and do what's called a wheel mounting surface (WMS) measurement. Then do a measurement from either WMS to the center of the pinion.

From a WMS measurement it will be easy for people to figure out where their tires/rims will be positioned in a chassis. Without the thickness of the brake drum/rotor you can't be sure where the rim is mounted in relation to the axle flange.

I have some axle width etc measurements on my website with a diagram that shows where I took measurements of several axles. I'd be happy to add any axles that people would like to measure.

http://dmr-architect.com/~locouki/widths-of-axles.html

For a stock "book" chassis it looks like the '79 to '92 ranger axle would be a good fit. The solid RX-7 also fits but there is a very limited ratio choice.


It is all there if your read my original post from back in 2007.
It is 51.5 from inside the backing plates
The measurement to the outside mounting flange is 3.75 inches from inside the backing plate.
The brake drums are usually an 1/8 each thick, so the over all length is 59.25 from wheel mounting surface to wheel mounting surface.
One will still have to locate a wheel rim with the correct offset for their particular application, as the offset is the critical adjustable part of this formula depending on your particular build.
I didn't include an overall wms value as the later Explorer rears use disc brakes and they may be a different offset than a drum setup, I doubt it if using common axles, but I wasn't a 100 per cent sure.
So for me to give an overall wms to wms may have been misleading as I dont know what the difference might be between the drums and discs, but the math is there.
I guess I could have added the 59.25 in the post, but back then I was young and exciteable :shock: , so I didn't think of it

So the bottom line is it is 59.25 inches from wms to wms on a drum set up.
I am guessing the disc setup will be the same, but wont swear by it.

Al

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