How many miles?
My Trac Lok was smoked after ~14,000 miles of regular driving...even ended up stuck in the yard at my other house ($300 tow bill later as two trucks had to pull me out) as the front end sunk down some. As you know the front axle is open, so I was stuck with two open axles.
Funny now, I was pissed off bad then.
Mid '09 build here. I had it pulled and installed a True Trac after arguing with the dealer that a limited slip differential should actually grip with BOTH rear tires going forward and not spin just one.
Shop disassembled the TL for me on a bench, clutches were black. Just tossed it in the scrap heap. LOVE the True Trac, nothing to wear out, grabs fantastic.