I've only noticed the BLD actuating my front wheels. Of course I don't normally have a lot of wheel spin when I wheel but the LSD seems to be quick to "lock" the few times I have lost traction in the rear.LSD is better than nothing. But to be honest I dont even know if it is worth it on the JL. LSD is not a substitute for a locker. In theory, a good LSD can be almost as good as a locker when rolling with smaller tires (32s,33s). But we all have BLD anyway and it is unclear how good the LSD in the JL is and if it can even handle 32s and 33s. So when my rear "locks" I cant tell if it is BLD or LSD, because I dont have a jeep without LSD to compare with. I would guess it is the LSD because when it locks it feels locked and steady in comparison with BLD which is unpredictable. I think it works pretty well, but I cant tell for sure. There is also a noticeable "lag" before I can get it to lock.