SO I went with the Pure FJ Sliders, I ordered them along with the A-trac button on Friday! Now I am eagerly awaiting!
Also totally off topic whats a good way to easily test the A-trac system something I can setup easily where the diff lock would not help only the A-trac, any ideas?
Thanks for all the help everyone
You'd have to get diagonal going across a ditch, so that for example, front-left and rear-right are the tires mainly on the ground (they'd be stuffed into the wheel wells). At that point ATRAC will brake the two wheels that are hovering over the ditch and not making good traction. It would buzz and vibrate, and then the two wheels that are stuffed will drive you out.
In that same scenario, ATRAC off, you lock the diff. Since you have ONE rear tire stuffed (hard on ground) and the other over the ditch, both rear tires will equally spin and drive you out while the front wheel that doesn't have traction still tried to spin.
ATRAC can be better than diff lock when there are adjacent objects. In that previous scenario where you are over a ditch diagonally....if there is a tree right next to your truck and you are just using diff lock...it very well may want to "drift" over towards the tree since both rear wheels are locked (kind of like a burnout in slow motion - If your RWD car is burning rubber, but on a sideways incline...its gonna scoot sideways). ATRAC will help this by using the FRONT traction of the one tire on the ground to PULL the truck out of the ditch hopefully in a straighter line.
EDIT: found the picture
I had an example of this one of my first times out. I found out my truck was an early 07 where the ATRAC did NOT work with the diff lock engaged (I hacked it to fix the issue later)
So in the picture, my front right tire obviously has no traction. My rear left down in that gully also doesn't. just barely touching mud.
I had my diff locked so my ATRAC wasn't working...I needed ATRAC to force the front tire and rear tire that were still hard on the ground to spin. Instead, my locked rear started pushing the truck over towards a tree you cant really see in the pic and we had to strap it and pull me up. That front tire on the ground just did NOTHING, as it would have if ATRAC was active (even with Diff Lock) to apply brakes to that wheel up in the air and force traction to the grounded tire.