i installed new agx gas shocks in the rear and now every time i turn or go over a speed bump cruising like 3-15 mph it sounds like a spring when you crunch it or smething. my guess is the springs! the car has about 180,000 miles on it

 

Is it like a "squishy" crunch? Mine has the same sound @100k. But, I have the original shocks and springs so it's time to fresh things up .