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After I did the suspension-lift on my 88 (extended shackles on a leaf-sprung rear) a couple years ago, I was getting a vibe at highway speeds. Installed a couple axle shims (which changed the pinion angle) and the vibe went away.


Can you shim a coil-sprung axle? Wouldn't the shim have to match the shape of the perch, so best keep the spring situated?

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