On my '10 Rubicon the owners manual says to engage 4L while moving 2-3 mph. When I do this I hear the gears grinding. Yet it won't engage at a stand still. What is the correct way to engage 4L ? As far as the lockers, the rear locks instantly, but the indicator for the front flashes and you have to roll before the indicator stops flashing. Is that right? Finally, I know you can't engage the sway bar disconnect unless you're in 4L, but where does it disconnect at? Thanks, trying to learn about the features.
Shift into Neutral, and then start releasing the brake. You should be able to get into 4lo at that point. Sometimes its picky and you have to shift to D or R for a second to move the gears/jeep and back to Neutral to try 4lo again. It gets easier as you use 4lo more in my opinion.
I usually shift into 4Lo while moving dead slow although I've done it while stopped as well. If it won't go in and you're stopped, keep the transfer case in N and shift the transmission into D or R for a second and then wait a few seconds for the gears to stop and try again.
While moving, I've noticed it goes in easier if I smoothly shift the transfer case from 4Hi to 4Lo without pausing in N.
It takes some practice learning how to maneuver your t-case to 4-lo without a grind...
My method is drive about 5MPH, in (D) and 4HI obviously, and then put the transmission shifter into Neutral. When the rig slows itself down to 2-3MPH, slide t-case knob from 4HI to 4LO.
You obviously go through N on the t-case, but you don't really stop there. Just kind of one swift motion from 4HI to 4LO while rolling a few MPH with tranny also in Neutral.
As for the lockers engaging, sometimes it will take a few feet before they lock in, or even unlock after turning them off. But they should engage/disengage within a few feet - if you are driving 20-30-50 feet and they still aren't engaging or disengaging then you may have some issues... a good dif housing cleaning and gear fluid change should do the trick for "sticky" lockers I've heard. I use Amsoil extreme gear lube and have never really had any problems (other than the 2-3 ft to disengage sometimes).
I have rubi axles swapped onto my X, but works the same way, just not through the ECU at all...