Definitely agree that having a 4wd tow rig is nice, especially a heavy dually like this one. I grew up doing site work construction and helping on farms and quickly found out that 2wd duallys are about the worst vehicle out there in regards to mobility. Many people think that by having 4 rear tires that makes them better, but generally not the case especially in mud as the duals just turn into one giant drag slick.
My personally tow rig is 4wd and can't count the number of times I've needed 4wd when towing the trailer. I would even consider my truck on the higher end capabilitiy wise in 2wd because it has an effective rear limited slip diff and good tires. There have even been times when I'm still on gravel but need 4wd and/or low range to get around.
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