Have the spyntec on a 2009 dodge. As other folks have said. Advantage is front drive train isn't turning all the time. It frees up the steering,and got 2 miles more mpg. I grease and repack every 20k. But it is used for pulling a load most of the time. Quick and easy job. Another advantage with the hubs,with a manual 4wd shift. You can use 4lo in 2wd ,and that comes in handy sometimes,backing a trailer In a tight spot.
