This is the same for open diff. It does not work as well as with the LS but it does still work. When I had an open diff, I drove up a couple tall rocks with only one front tire. If you just barley give it gas and let the tire spin a bit, after a couple seconds you will feel it kick in, the free tire will stop spining and the other tire will begin to get power. Different process happening but same technique. So if you need it to kick in with open diffs, just give it enough gass to rotate the free tire for a couple seconds and the computer will kick in. I tried the LS brake dragging tchnique and I did not notice it kick in any sooner. I think with the Open diffs it needs to sense the tire spinning for a predetirmined amount of time before it kicks in. LS is physically tranfering power whn braking which is not true with open diff
Yeah, when I say "ELSD", I'm referring to the front, open, diff - the owner's manual differentiates the "Electronic Limited Slip" from the "Brake Traction Control/ETC" - I think they differentiate because the two features search for different effects (ELSD looking for a completely spinning wheel for a period of time, BTCS/ETC relying on a sense of direction and wheel rotation). The rear, "actual" LSD (for those that have it) seems much easier to trigger, I give it a more rapid acceleration and it quickly engages.
[ EDIT: They don't actually call it 'ELSD' in the manual, they refer to it as a feature of TCS that "acts like a limited slip", and this feature is distinct amongst the other features, especially in that it remains enabled even when TCS is disabled. Just to clarify any confusion in my post ]
But yeah, you need to spin that wheel for a few seconds before the electronics kick in and stop it. The application of the brakes/e-brake may help by providing friction, but I'm still boggling as to how that would help the front, open diff more than it helps the rear, actual, LSD.
Man, with all of the electronics, I kinda wish they had used something closer to Quadra-Drive II front and rear LSDs (Obviously, the entire system would be a little weak for a wrangler, especially the center LSD) but I found it highly responsive in off-road situations, and the use of clutch-driven, electronically controlled LSD's front and rear made it VERY responsive, on the order of fractions of seconds rather than whole seconds. Admittedly, I'm not sure all of those clutch-pack LSDs would take long-term abuse, but they did drive a commander with it down the Rubicon - with a lot of body damage, of course. =)