I have the Dynatrac on my 03 and love it. It replaces the sealed unit hub bearings that in my case needed to be replaced anyway, I don't have my frt axle turning all the time ( saves a little bit of fuel ) and of course I can do 2 wheel low for spotting my trailer. In the winter I just leave the hubs locked all the time so if I need 4WD I can get it any time. I live in a climate where there is lots of snow so you might want to do different. Yes it did cost a bit of money and I installed them myself, with help, so no labour costs. I have stock wheels and tires so I just cut a hole in the hub caps and they do sick out a bit since I don't have dual rear wheels. Would I recommend them to any one YES. Shad