Sorry may be a dumb question. Okay im confused like i dont know what. I look up how to decipher tags and none of them look or sound like mine. It reads from top left to top right
3.07:1 D7TA-4001-B2F and then from bottom left is
1004005 can anyone help me figure out what size rearend i have? I know the gear ratio is obviously 3.07:1 its in a stock 1977 F100 302/c4

 

It's a Dana 44...

It has a removable rear cover, right?

 

X2

See here.... FordPartsWiki - Master Parts and Accessories Catalog FPS 8096-A October 1986

And next page...... FordPartsWiki - Master Parts and Accessories Catalog FPS 8096-A October 1986

 

Yes it has 9 or 10 bolts... Hard to tell with all the grease and dirt build up.

 

This is a 9 inch...

 

This is mine. I will try to clean it up some tomorrow. But its no 9"

 

Yup, it's still a Dana 44...

 

interesting "Industria Argentina"

 

Can anyone give me some info about it? Like is it a good one or an okay one?

 

My 54 has a 44. It's held up well over the abuse I've given it.
Someone else will know more about it than me, but isn't it a little unusual in a 77?
I have a 77 frame on my trailer now with a 9" in it.
The Argentina tag confuses me.

 

Yeah i cant find anyone who knows a lot about it. Most ive heard about it is up here.

 

There are a couple of references to "Industria Argentina" differentials on this site:

https://www.ford-trucks.com/forums/1...-rear-end.html

https://www.ford-trucks.com/forums/8...w-answers.html

 

I had a 78 F100 2wd that had a D44 in it..........no idea if it came out of the factory that way, was in it when I bought it in about 94-95. Nothing weird about the way it looked and I installed a DJM lowering kit with no issues so.......I never looked at the build tag to see........

 

Okay guys looking to swap out my gears. Does anyone know if a front and rear dana 44 ring and pinion gear have the same spline count?

 

Dana 44 came in some light duty 2wd F100's, my 79 being one of them. Got swapped for a 9 inch