For what it is worth. I have a 09 qc with the 3.55 rearend with the 20's. I haul a 5400 lb trailer that has 1240 lbs tounge wieght 70 miles round trip every week. I have the airlift 1000s filled to 30 psi and the truck handles like there is nothing back there. As far as the limited slip in the winter, I had it in my last truck and it was good for getting around in town but on an icy highway if you lost traction both wheels spun and it tried to put the back wheels in front of the front wheels.
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