i have i 76 3/4 ton and i went to look and see what axle i have in the rear and it had no tag and no casting numbers where the danas usually do on the flange on the bottom it looks to be a d60 as the bolt pattern looks right but it also has these wierd ribs on it that run all of the way around the housing the guy i bought it from said he had a new rear end put in but im not for sure he didnt seem too mechanically inclined i know this cause when i bought the truck it had headers that werent welded up so got it fixed drove it a day and thew two rods right through the pan couldnt listen for a knock cause exhaust was too loud

 

Would the ribs happen to look like picture 20? Dana 44 Solid Front Axle: Reverse Spiral and Standard Housing info..

 

Check the BOM on the tube just to the right side of the differential.
Dana 60's 61's and 70's all share the same diff cover, so this will be difficult to use as a reference, nut the BOM will tell you.
You can also remove the cover. The ratio will tell you whether or not it is a D61 or not, and if the diff cover fits the sealing surface right to the lower edge, you can eliminate the 70. Spline count can also help. All of this combined with the ratio can determine what you have
You more than likely have a 60.
Pics could help.

 

As original, it's most likely a Dana 60, and there's two places to ID it, but both are in code.

On the left axle tube just adjacent to the inspection cover is a 2" x 1/2" metal Dana ID tag bolted on with two bolts.

It has a 7 digit Dana ID number on it like: 603010-1

On the Warranty Plate, located on the left door face below the latch you will find the AXLE code.

Post either or both of these codes, I will decode them for you.

Note: The Dana 44 was not used as a rear axle on F250/350's.

If the rear end has been swapped, and it's not a Dana 60, it could be the Dana 70 used on F350's. Both have the same brakes and use the same 8 lug wheels on a 6.50 bolt circle.

The AXLE code ID tag on the Dana 70 is in the same location as it is on the Dana 60.

 

found the one on the door and it says B4J dont have anything below that cause the tag is sheared off under that axle has no tag anywhere not on the tubes or cover cover is after market chrome pos sorry cant post pics dont have digital camera and the ribs im talkin about run parrallel to the surface of the case im stumped on this one

 

B4J: B4 = Rear Axle Code = Dana 60 / 4.10-1 / Limited Slip / J = Front Axle Code for Power Steering

The ID tag which is under one of the bolts that holds the inspection cover on, is only used on Dana 44's, AFAIK. Most of the time, it's missing.

On the 60's and 70's the ID tag is on that thin metal ID tag which is bolted onto the left axle tube. On some of these, the ID code numbers are stamped on the top of either the right or left tube.

After 30 years of road grime, rust and whatever else, those axle ID numbers can be hard to find, much less read.

 

thanks will the 4.10 be ok pulled the front tag off and it said 4.09 ill have the tubes down on it tomorrow and see if anythings there i dont think that the axle under it now has been ther for thirty years cause the guy i bought it from was not the original owner and he said that he blew it out loaded on a pot hole

 

4.10 rear and 4.09 front ratios are acceptable. That is the way the factory did it.
If you are confident that the ratio is a 4.10, you can pretty much eliminate the possibility that the axle is a Dana 61. Without modification the ratio could only be around 3.54
It is entirely possible that the rear axle has been changed. In 30 years, there is a very high possibility that it has, but if the truck has not been lifted, or has been left relatively stock, then it is possible that the ratios have not been changed, and you again have either a 60, or 70 back there.
If you cant find the BOM on the axle, then you should look closely at the diff cover. SInce the 60, 61, and 70 all use the same cover, you will notice a distinct different between the 60 / 61, and 70, with regards to the fit of this cover. A dana 70 will have an obvious ridge, or flat area on the sealing area at the bottom of the diff, just under the cover. THis will appear that the cover is too small, and dose not quite cover up the entire sealing surface. The bottom of the cover does not fit exactly flush with the bottom of the diff. It will leave almost a 1/2 of an inch of the flat sealing surface, and is very easy to detect.

Here is a little more reading and some interesting links;
https://www.ford-trucks.com/forums/6...ification.html

 

ok mine is definetly not a d70 cause the two are almost flush

 

does it look like this? if so its a ford stearling 10.5"

 

no it dont look like that it looks like a d60 i did finally find some numbers on it numberdummy a little help with these please
fist one says 6153319
the second one says 6033829 these were both on the passenger side axle tube along with a yellow painted stripe

 

number dummy are ya there i need ya to see if these numbers are the ones

 

dead thread