06 F350 SRW LSD

[06_6.0]

Hey guys,

I've got an 06 SRW F350, just like the title says and me and a buddy had just finished rotating my tires and decided to take the truck for a ride. I did a little powerbraking and let off, lo and behold I had a nice little one-tire-fire event. Factory lsd going bad? If so I'm thinking of replacing it with a TruTrac at some point in the near future. So how do I go about figuring out which rear I have? After reading my owner's manual a few weeks ago I was under the impression that I had a Dana 80...but after doing some reading here it seems like I may be wrong?

Thanks in advance!