From the pic can you tell me what rear end I have?

It is open now and want to change to a limited slip or better, what would you put in?

I will grab the tag latter today once the weather clears.

 

Tag info - 2 Tags

First Tag

3____S_710_A
3_55__9_75__7E20

Second Tag - Lube info

75W140 SYNTH
OIL ONLY

So I have an open 3.55 9.75 gear. but what is it, a Dana 60?

 

what year is it?

 

You have a Ford Sterling 9.75 rear there. You can tell by the rather unusually shaped case webbing.

 

it is for my 97 E-150

Ford Sterling? Never heard of that!

Thanks!

 

Its usually just called the Ford 9.75, Sterling is the factory its made in.

Your choices for a limited slip in those things are kinda slim. You can get a factory Ford TracLoc, an Auburn H/P, Eaton Posi, or a Detroit Truetrac.

I personally don't like how most limited slips perform in ice. Which is basically like they weren't there. Most need SOME traction or resistance before they lockup properly. I install Eaton E-Lockers or Auburn Ected in all my trucks. Sadly, i know there isnt a selectable locker for 9.75s right now. Which kinda stinks for almost every F150 owner out there.

 

That looks a lot like my Dana 60. A Ford TracLoc is a waste of money. Check into ARB.