And it's not a "shackle" it's a spring hanger / spring mount. Only ONE shackle on the spring, and that's at the front (on the front springs), near your bumper. The rear part of the front springs are a fixed mount, spring hanger. No shackle involved.
I want my last post back. I knew there was no shackle back there. John -- John Hofstetter www.goldrush.com/~hofs