I have swapped out my Jeep Unlimited Dana 44 limited slip diff w/ 3:73 gears, for locker with 3:56 sometime back. I have the carrier and ring and pinion with less them 35K on them, and was wondering if they are interchangeable in the old F100s?

 

Sometimes maybe.
The parts used in the "Dana" 44 started appearing in the late 40's with Jeep and Ford and as far as I know are still being produced today.
I know there were a few things that could be used in the Vetts just a few years ago.
I've thought a couple of times of gathering up parts and playing See What Works.

I found a Dana/Spicer Part Number change catalog and followed a shim from the F1's up through the 80's.

 

I think if it would work, the 44 would be pretty stout. I've seen people run the 44 through all kinds of rough treatment and they keep on going. Just want to be sure it will work.

 

d-mn i wish i'da been smart enough to ask , just figured they were two different animals due to the age difference . i just scrapped a dana 44 i had out at my unks place out of a 85 { i think ! } f-150 with a 3: 42 limited slip in it . sheez and i was looking for a 9 inch to replace my dana , when i coulda bought a rebuild kit and had someone set it up ................ just my luck !!!!!!!!!!!!!!!!!!!!!!!!!

 

Ol Randy gots some 44 Stuff over here

Randy's Ring & Pinion

 

So you know how you should look under your truck before you make axel plans, you know, to be sure you actually have a Dana 44? Looks like I'm not able to use the limited slip and the gears after all; The previous owner swapped in a Ford 9"

Guess its off Ebay or Craigslist to sell them. Any idea what they are worth?

 

the pinion to yoke spline will be different, old are coarse and new are fine spline. you can use any newer 44 yoke, just get one that takes the U-joint you want.

also, be sure you don't have a Dana 41......... the were still making them and look very similiar to a 44

 

The 44 used parts from the 41----
and the Saga continues

 

The parts I have (limited slip and ring and pinion) are from a newer Jeep.. My 55 has a newer 9" so I won't be adding the gears now unless I swap in a original 44.

 

No Dana 44 rear axles after 1978, and very few F100's in the 1977/78 time frame had it. No F150's at all.

Dana (Spicer) 44 rear axles were used in F100's from 1953 thru 1958, then as a Limited Slip only axle on F100's in place of the 9 inchers from 1959 thru 1967, early 1968.

Re-introduced in 1977/78 in F100's, because these later Dana's could be had with a 2.75-1 ratio, just what these trucks needed in the late 1970's when a gallon of regular gas was just over a buck a gallon.

That was a lotta money back then, as before the first Arab oil embargo of 1973, regular gas was less than 25 cents a gallon.

Ford passenger cars from 1949 thru 1956 used the Spicer-Dana 44, as did Studebaker from roughly 1941 thru 1966 on cars and thru 1963 on 1/2 ton trucks.

All 2004 and later Nissan Titan pickups use a Dana 44 rear axle (and another if 4WD is present, for the front axle).

Jeep, Dodge, Nash, Hudson, Kaiser-Frazer, and many other makes also used the 44 at one time or another.

The very first Limited Slip rear axle sold in the US was made by Dana and installed in 1956 Packards. It was called Twin-Traction.

 

So the 44's in the 48-52 F1's are really 40's or 41's?

 

In the 1948/56 Ford truck parts catalog, there's no mention of Spicer 44's till 1953.

1953/56 Spicer 44 rear axle parts list: #65.

1948/52, the catalog just calls them Ford rear ends.

1948/49, the rear axle parts list is #59.

For 1950, two parts lists are shown, 59 & 60.

1951/52 also call for parts list #60.

Since none of the parts lists for 1948/52 jive with the Spicer rear axle parts list of #65, these aren't the same.

I think I read on here that these early rear axles are Spicer 35's.

 

When did Spicer start calling it a Dana 44?

 

Studebaker used Spicer 44's from at least 1941, and the rear axle prolly existed before that date.

> > 1948/56 Ford Truck Parts Catalog / Truck to Rear Axle ID Chart / Text / Page 145. 1948/52's are refered to as Ford axles. 1953 is the first year the catalog refers to Spicer 44's.

After looking thru parts lists 59, 60 and 65 (Text-pages 177 & 178) some of the parts interchange, so all are Spicers, but what the 1948/52's are classified as, I dunno.

Someone here typed that 1948/50's are Spicer 35's, but the only thing I have to go by is the Ford parts catalog, and it's not talking.

 

The 35 is a totally different axle, smaller ring gear, and axles.
Knowing Ford they probubaly produced the 40/41/44 under an agreement and used them as their own when needed.
Ford had the same deal with Warner Gear, they both produced and/or could produce each others trannies up thru the late 60's.
The heavy duty GM Dearborn 3 speed Toploader was the Ford 3.03.