9'' posi ? ? ? ?

i just got back from pick n pull

and i found a 78 F100 or F150 ? VAN with a 9'' rear and it has a small 1'' tag and all it reads is 3.56 32-sun 9-pin

so i am wondering if it is posi

when i turn one axle the other spins the other way but if you try to stop it it won't turn unless you use 2 breaker bars one on each end

if you try to spin bolth axles to the front it won't move

but if i spin the driveline bolth axle's will spin towards the front ?

so i pulled the thirdmember and the numbers i got wer

WAR4206A and A14 that was on the housing that bolts to the sun gear

case number is WAR 4025A

the unit where the sun gear bolts up (where you see the bolt heads) is all smooth no casting / rough look and i don't think it was resesd around the bolts ?

i didn't have enough time to take it apart and see if it had clutches because they wer closing

just wondering if it's a posi unit or not if so then i am going back to get it

they charge 80 + tax ---- about 90 bucks out the door

 

3.56 should be the gear ratio.
Should have a "3." then a gap, then "56".

"3. 56"
If it was a "posi", it would be:
"3. L 56"

 

it's a 1'' tag not the stock one

might be somthing a shop made ? it's the size of 3 pennies next to each other

 

Ford never made a Posi...G.M. did.
If it was in a van then it would be a E series, the trucks are F series.
The reason it turned the other way is because it's an open rear end. WAR case was made in the late 50's and have 2 vertical rids like a N-case. 4026-A is the part number. A 14 is a date code. Rear ends don't have a sun gear. It is worth $90 if you don’t go drag racing with it every week end.

 

Early rear ends have a tag like this.

 

With my 9 inch rear that has a traction lok unit, both tires spin the same direction when you spin the yoke.

 

my tag looks just like that tag but with 3.56

 

try this:http://www.kevinstang.com/Ninecase.htm

 

Seems you guys get a bit defensive about terminology. I think posi became the general accepted term for a limited slip diff years ago (may be a regional thing) and was no longer a reference to brand identification. When I was in tech school here and in Phoenix the instructors referred to them as a "positive traction type differential" or posi for short. Seems kind of petty to continually correct people over it. This is not directed at you, just seems to reoccur on this forum regularly.

 

yes it does and is really unnecessary

 

Yep,,, I just had to wipe my eyes with kleenx,,, sorry, I mean tissue,,,

 

is...necessary...if one is GM and the other Ford...

...also could be a price difference at a...rearend shop...to rebuild...

......

 

Are uou sure you didn't mean handi-wipes

 

If it is a 9", it's a Ford. Terminology doesn't really matter. Limited slip, locker, posi, positraction, I really don't think it matters. The axle also could have been fitted with a locking diff after the factory build and not tagged. We do it all the time. If you turn one axle and the other turns the same direction without holding the pinion, It's a locking or limited slip diff. If you hold the pinion and the other axle spins the opposite direction, it's an open diff, but it's still a 9" and worth $90 in my book.

 

Let's call all four barrel carburetors a Quadrajet even if it's a Holley or an Edelbrock. We might as well call fuel injection a carburetor also. The same goes for a Tubro350 and C4. Does it really matter? Aren’t both a 3-speed automatic?