Replacing rear coil spring insulators soon....anything I need to be aware of?

your going to have to unbolt the one side of the lower control arm conected to the rear, and also unbolt your shocks connected to the rear. put a jack under the lower control arm as you unbolt it, and then lower it the arm slowly, as its under a little bit of a load.

This may help also
COURTESY OF MFE ON CORRAL.

Block the front wheels and raise the rear end. Leave the floorjack under the diff, and place the rear end on jackstands just ahead of where the lower control arms connect.

Remove the rear wheels.

Undo and remove the swaybar (15mm Deep)

Undo the lower shock mount, fasteners vary but it may be a Torx and it may be a 15mm 18mm combo.

Remove the quad shocks.

Lower the jack so the axle drops as far as you can without pulling the rear brake flex line.

Now put a second jack under one end of the axle and raise that end as high as you can.

You can now probably just pluck the low-side's spring out. If not, have a helper stand on the low end of the axle to help it the last little bit and pull the spring out, it’s not under any compression at this point.

Swap isolators to the new spring, orient it so the flat side is up and the bottom pigtail points to the drivers side (for BOTH springs).

Lower the high-side jack, make sure the new spring is seated properly, and repeat the process for the other side.

When you’re done, raise the diff back up, reconnect the quad shocks and shocks. Re-attach the swaybar, reinstall the wheels, lower the car and you're done in way under an hour.
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