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Old 12-06-2008, 04:48 PM
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Identify this Ford Rearend.

Ok ladies and gents. I am trying to idenfity this differential that is currently in a 1965 Ford Pick Up truck.

The tag numbers look like this:

DN-E
25-5BA 313

The "N" in the top series of numbers may be a "11".
The "B" in the bottom series of numbers may be a "8" or a "3".

There are two dimples on the rear housing and a fill plug.

The bottom two nuts of the ten that are on the 3rd member can not be taken off by a ratchet (would have to loosen them with a wrench due to spacing).

There are three horiztonal ribs and one vertical rib on the third member. Ther is no "N" on it (damn it).

I am almost certain this is a very old Ford 9 inch but I want to make sure. I would also like to know if someone can tell me if this is a posi and what types of gears are in it and maybe the axle spline number. I can't identify the tag anywhere on the internet.

Any help would be much appreciated. I'm desperate. Thanks.

Brent

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Old 12-06-2008, 05:01 PM
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Quote:
Originally Posted by 31fordcoupe
Ok ladies and gents. I am trying to idenfity this differential that is currently in a 1965 Ford Pick Up truck.

The tag numbers look like this:

DN-E
25-5BA 313


The "N" in the top series of numbers may be a "11".
The "B" in the bottom series of numbers may be a "8" or a "3".

There are two dimples on the rear housing and a fill plug.

The bottom two nuts of the ten that are on the 3rd member can not be taken off by a ratchet (would have to loosen them with a wrench due to spacing).

There are three horiztonal ribs and one vertical rib on the third member. Ther is no "N" on it (damn it).

I am almost certain this is a very old Ford 9 inch but I want to make sure. I would also like to know if someone can tell me if this is a posi and what types of gears are in it and maybe the axle spline number. I can't identify the tag anywhere on the internet.

Any help would be much appreciated. I'm desperate. Thanks.

Brent
Probably what they call a WAR case, the war case usually didn't have a fill plug on the center section and used the plug on the back of the housing,Still better than a stock case but not quite as good as a N case. Some of those WAR cases came with a daytona pinion support also,That would be a pretty good set up.

If you take a pic of the pinion support I can tell you if it's a daytona support.
I don't have a list of of those tag number's, all my list's are for the cast number that is on the inside of the housing. If you where to remove the center section you will probably see the WAR cast into it.
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Old 12-06-2008, 05:18 PM
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Search these pages:

http://www.fordification.com/rearends-ford01.htm
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Old 12-06-2008, 05:52 PM
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Hey Prostreet, can I email the pictures to you. They are too large to post here I guess.

By looking at the above reference guide link, I think the top letters may be:

"WDN-B" and I just can't read the W due to rust and the B could be the E that I saw. I'm guessing that would make it a 9 inch with 3.50 gears.

If you can take another look at this I would appreciate it ProStreet6t9.

Thanks again.
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Old 12-06-2008, 05:58 PM
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Ok I was able to log the photos in my other photo journal. Please go to this link to see the pictures. Thanks.

http://www.hotrodders.com/forum/jour...57&action=view
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Old 12-06-2008, 07:58 PM
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Just a standard case and pinion support, When you said 3 ribs I thought you where just counting the top ribs. Are you going to pull it apart and inspect before you put in?

By the way,Cool hotrod!
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Old 12-06-2008, 08:05 PM
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I haven't even purchased the rear end yet. But are you in agreement that it is definately a 9 inch?

Thanks for the comment about my 31. It's going to be a long process but it's gonna be a screamer when I'm done.
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Old 12-06-2008, 08:17 PM
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Yes it is a 9"
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Old 12-06-2008, 08:21 PM
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Ok thanks Prostreet for the help. And yes I'm going to go through the entire thing before I install it.
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Old 12-07-2008, 04:05 AM
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This will help ID.
http://www.kevinstang.com/Ninecase.htm
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Old 12-07-2008, 09:44 AM
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The only way to tell a Ford posi is to look at the ring gear bolts.
A posi will have the ring gear bolts recessed into the carrier.
An open rear the surface will be flat.
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Old 12-07-2008, 10:38 AM
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I had a look at that tag ... blew it up to 400% in M/S Photo editor.

Almost all ford tags begin with "W" .... and if you use your imagination it looks like that might be visible.
The second character is hard to make out "C", "D", "G" ?
The third character sure looks line an "N"
the "-E" is pretty much for sure from what I can see.

The second line
"3(?) space 25" would indicate a 3.25 ratio non-locking.
If it were locking, it would be "3L25"

The rest of the second line is date built and plant code.

The funny thing is though, that I couldn't come up with a series of letters (WCN-E, WDN-E, WGN-E) that listed a 3.25 ratio on that fordification website.

You could use a couple of other methods to determine the ratio...
The most accurate way would be to count the number of teeth on the crown gear, and divide by the number of teeth on the pinion. I believe that Ford usually even stamped this info in on the crown gear itself. i.e "39-12" would indicate a 3.25 ratio

You could even do it visually to get a "ball park" idea. count how many turns of the pinion shaft it takes to get one full turn of the crown gear.
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Last edited by 66GMC; 12-07-2008 at 10:47 AM.
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Old 12-07-2008, 12:17 PM
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Thanks for the input guys.

I had researched the www.kevinstang.com site and it was an immense help. I also learned about the recessing of the bolts on the ring gear lock down so I am hoping when I pull the third member they will be. I am probably going to purchase the rear end this coming week and then tear it all apart (it's complete out to the drums).

I too tried to get the numbers on the tag to match up against the Ford identification sheet but I had but no luck. Thanks alot for your work on that though 66GMC. Guys like you three make it enjoyable to come to this site and learn.

Brent

Last edited by 31fordcoupe; 12-07-2008 at 12:25 PM.
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Old 12-07-2008, 01:55 PM
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Quote:
Originally Posted by 31fordcoupe
Thanks alot for your work on that though 66GMC.

Brent
No sweat. You might try actually removing that tag, straightening it out, and then run it over with a wire wheel to see if you can determine what those "mystery characters" are for sure.

If you can find a Ford dealership that still has a set of the old microfiche catalogs on hand (or better yet old PAPER catalogs) they might be able to help you de-code more info as well.

One more avenue is to have a look on the rating plate and see if there is an "axle" or "ax' code there ? Don't quote me, but I think the rating plate was on the inside of the door pillar ... to the left of the driver's feet in those old trucks. (That's where it is on my 66 GMC, too)

Ford might be able to tell you something that will confirm it's identity from that info as well. If nothing else though ... you will be able to order what you need from the physical measurements and descriptions that you have been given. Most of those 9" Ford components are either much the same or substitutable anyway. (i.e. gearing changes, posi upgrades ... ) The tag info will just pretty much identify what you have NOW.
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Old 12-07-2008, 02:21 PM
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A quick way to tell if it is a posi- with the yoke free, (no driveshaft, or trans in neutral), spin one wheel ..the other wheel will spin in the same direction. If the wheel spins the other way, or not at all,(yoke will spin), it's an open rear end.

If you hold the yoke,(with driveshaft installed, in park or in gear) and spin one wheel, an open rear end will allow the other wheel to spin in the opposite direction. If you hold the yoke and try that with a posi, it won't spin.

There is a minimum amount of torque that the clutchpack in a posi should hold, measured while one wheel is being spun while the other is being held still,(one wheel jacked up off the ground, and yoke free to spin),IIRC it is about 40 ftlbs minimum, and with new clutch plates installed the spec is min 100 to 250ftlbs.

Later, mikey
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