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Old 10-15-2019, 10:04 AM   #2
Joe K
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Join Date: Jul 2010
Location: Cow Hampshire
Posts: 3,397
Default Re: Rear spring shackle

You don't tell us which car you have.

On the truck the 10 leaf spring is "tensioned" to the shackles. You have to somehow "compress" (and thereby extend the eyes) of the spring somehow (Victor Page in his book shows the spring compressor and blocks of oak and most today use a "spring spreader" - I have used blocks of oak and mass quantities of weight in the back of the pickup and a "bridge compressor" which is more akin to Victor Page's method)

But unsprung, the truck spring "pulls" the shackles together and out to perpendicular to the backing plates - not much movement there.

Under no load in the truck the shackles drop to about 15 degrees. Fully loaded about 30 degrees.

Other vehicles with lighter duty springs may be more "limber?"

Joe K
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