Something to remember about clutch type diffs, they are just like the clutch in your manual car. I've seen a kid take out the clutch in a truck in a weekend. If you keep you tires inflated to the same psi and don't spin your tires then you're not going to cause much wear to the clutch paks in the limited slip. But if you are spinning your tires a lot those clutches are going to wear faster.
To try and answer/not answer your question about longevity, I have had to rebuild limited slips at 60,000 miles and then have seen some go 200,000+ miles and still be going strong. Just looking at the diff isn't really going to tell you if the clutch pak is still good condition.

 

My old 9.25 axle had 200k on the limited slip and it still worked great. But was not driven like an asshat it's whole life.

The Dana 60 has unknown miles but the limited slip works great in it also.


Speaking of clutches, dad had a 08 focus that had over 100k on the original clutch when he traded it in. Lots of highway driving though.



Truck looks great

 

Yup... I'm at 183k and my LSD is still working fine... has a little whine, but it is doing it's job... changed the oil at 75k and 150k.

 

180k here still going. And my trans clutch lasted 165k until throwout bearing started squealing but clutch disc still had life. All in how its treated. Lovin the truck OP. Maybe a small lift now to give it that perfect stance?

 

That was the same with mine... the throwout bearing disintegrated, and there was still some miles left on the clutch.

 

Got my Custom Rear Center Counsel/Subwoofer box completed tonight. Worked out pretty sweet, got a color matched subwoofer to match the paint on the truck. Not that you will see it anyways...lol I still might add some cupholders to the top of it.

 

That was quick..... Looks pretty good.

 

Trucks looking sweet man.
I see you went with Toyo tires but your decal is a Super Swamper Thornbird tread. Looks good but..... Lol