Why does it matter if your spring unseats?
back in the TJ days, the front coils had retainer clamps that secured the base of the driver side front coil to the lower perch on the axle. i suppose if you were to install something like that on your JK but on both ends, it may not be that big of a deal if they unseated a bit. as mentioned, the big concern is that there is a good chance that the coils may not sit back in their indexed perch properly.
in the rear, teraflex actually has upper spacers with a peg that sticks down and will allow for some unseating and be guided back in place. however, unless the bottom of the coil is secured to the axle, the lower perch isn't all that tall and you still run the risk of loosing a coil. of course, you can install an upper an lower retainer like currie makes but then, you would be pulling your coil apart and i'm not so sure that would be a good idea.
having said all that, unless you have control arms with bushings that can that much flex, it might not be such a good idea to even go there.
in the rear, teraflex actually has upper spacers with a peg that sticks down and will allow for some unseating and be guided back in place. however, unless the bottom of the coil is secured to the axle, the lower perch isn't all that tall and you still run the risk of loosing a coil. of course, you can install an upper an lower retainer like currie makes but then, you would be pulling your coil apart and i'm not so sure that would be a good idea.
having said all that, unless you have control arms with bushings that can that much flex, it might not be such a good idea to even go there.



