I have an 2004 Toyota sienna with 51,000 mile i have change the shocks and struts trying to resolve the problem and the problem still exsits. They are not leaking, mechanics tell me thats normal. when i hit a bump or pass thru a padhole sound horrible. what could it be?

Did you ever receive replies on this? I have the same issue with a 98 Sienna. I have had struts, shocks, and springs replaced, but wince whenever I go over a bump.