Well if you want instant grab, go locker, a LSD is just that, "limited" it's better than open but not much.
Maybe than the factory unit.
My Eaton grabs instantly.
Like I stated above.
Both black lines are the exact same length... Acts exactly like the fulltime posi in my uncle's Nova... except around corners
My truck you can tell it takes a while to kick on from the lines...but it's probably getting worn out.. new it worked pretty good.