Leaf spring shackle movement

[68ChargerJMP]

Assuming that we are talking about a Hotchkis or equivalent lowered leaf spring with a near zero arch at ride height...How far will the shackle actually swing forward and backward at both limits of suspension travel?  Thanks.

[cdr]

it depends on how long the rear shocks are when extended all the way, just driving they will not move much.

[HPP]

With a true zero arch leaf, there would be no rearward movement. Compression would actually pull the shackle forward, as would extension. Since at zero arch there may only be  2-4 inches of upward travel, the shackle may only pull forward 1/2 to 1 inch. Extension, on the other hand would be, like cdr says, limited by shock travel, but  could easily be 8-10" or more. This would be sufficient to pull the shackle all the way forward and over center until it is snapped against the frame.

[68ChargerJMP]

Thanks guys.