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Jim, just out of curiosity what is the capacity of that rear tank? That looks really good. And I have to say that I noticed those spring shackles even before I looked at the tank! Those things look beefy! Gotta love Sky Manufacturing. They make some good stuff.
I swapped in my 3.55 rear axle this weekend (well actually it took me two evenings last week too, but I finished it up on Saturday). Just too much to do last week to get the front done at the same time. I am hoping to get things lined up to swap the front axle out this coming weekend. I am liking the 3.55's! Right around 1500 RPMs at 60MPH. Since I don't tow heavy real often and the truck is my DD, I think this configuration suits my application a bit better.
Yeah if you're running 36's you'll be needing those 4.10s. I only run 285's on mine and don't really want to go much bigger than that though so for me the 3.55's work well.