I am thinking about adding an Eaton True Trac to my Dana 80 rear axle with 3.54's.  I have gotten by with open differentials for almost 17 years on this truck but have gotten stuck bad only once.  I have noticed on MANY occasions that my truck has almost ZERO traction on level ground on grass and inspite of my best efforts NOT to spine a tire almost always do.  Yesterday while checking on a forestry unit I had to drive up a very steep access road which was little more than a smoothed up logging road.  I made it to the top but I could feel the tires slipping here and there while in 4WD.  Has anyone here had an Eaton or similar True Trac differential installed in their truck or installed one themselves?  Comments, suggestions, and input would be very helpful in assisting me with making an informed and wise decision.  Thanks!  

I ran Detroit true Trac in my jeep that was daily driven. They worked great most of the time however it is not a locker and can still give you one wheel peel in certain situations.

If money isn't a concern it is very hard to beat an air locker like Arb or Yukon, Eaton also makes an electric locker. I have no experience with e-lockers so I can't comment. Selectible lockers are the best of both worlds, open diff on the road and at the flip of a switch 100% power to both wheels. 

I have a Detroit true Trac and love it does exactly what it is supposed to in a d 80 with 355s

When my limited-slip goes out I'll probably be putting True-Track in. Although in my work truck 2015 f350 I have a electric Locker that came from Ford and it does work real well, but since I got this truck I only used it maybe 5 times. So question is does it worth it in the end. Like mentioned, if money is not a concern, then why not.