Do lift shackles cause a stiffer ride?
I should know the answer to this (and thought I did) but there seems to be a few different opinions. I put 4" lift shackles (for about 2" of lift) in my leaf-sprung TCL at the same time as having new mains and add-a-leafs installed. Now she rides like she's on concrete.
I know the new springs would stiffen things up, but what about the shackles--do extended shackles change the spring rate, and would reverting to the stock shackles take out some of the stiffness?
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