OK, going to do free wheeling hubs on my 2010 RAM 2500, I have researched Dynatrac, Spyntec, RAM man, Yukon Gear and one other one. I am leaning towards Spyntec sold by Genos, bearing races already installed, cost are pretty close to each except RAM man, his hubs look like they use the same weak bearing set up, certainly be the simplest and quickest, but I'd like to get the better serviceable wheel bearing upgrade also. Just trying to stop all the front hardware from always spinning and not having to wait for my stock wheel bearings to fail will be nice.

Anyone else do this? What kit did you use and why?

I have the Syntec and love them, I installed myself, and are easy to maintain, they come with Timkin bearings also, I've had them for 4 years with no issues .

Although, mileage isnt my reason on these, I know it will improve. Did you notice a MPG increase at all?

Another reason for choosing Spyntech, was the complete parts breakdown with all the common bearing and seal numbers shown.
Thanks N of 49th

I did notice a small milage increase, but my main reason for installing the Spyntec kit was to stop the front drive shaft from turning and wearing out the CV joint, I can tell you that the steering and handling was the real suprise, it makes a huge difference !!! Which ever kit you buy I think you will be happy.

I would look at the Spyntech Shorty.

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Dynatrac all the way. Just did mine on my 2016. Working on Cad Delete axle as well. BIG difference in steering.

I put the Yukon ones on 2 of my trucks and haven't had any issues.

Can't really go wrong with Dynatrac.

The first thing I noticed after the install was that the vibration(s) I didn't even realize I had were gone.
The second was that I had to learn to let off the throttle sooner when slowing down. There was a big difference in rolling resistance.

I am interested in these as well. Quick question.....if you have your hubs locked in, do you still have the ability of shift on the fly 4wd or do you need to come to a complete stop before shifting?

With the hubs locked it's still just like stock as far as shifting into 4WD goes, just with better and longer lasting parts.
Well, at least with Dynatrac's setup it is.

Thanks Jimmy....I watched the Youtube video on their website...that was very informative too but didn't cover the shifting. Good info, and something to start saving for. Thanks!!!

Got the Yukon on dually...installed myself... no issues....would do it again...slight increase in mpg...has the right hubs no sending in for machining (dually) ...less expensive for the rest...