Check that the upper mounting plates aren't bad, causing them to be
to metal. Usually when they're this bad, you can tell by lifting and
the vehical while observing the mounting plates. If they're worn bad
to cause a "thumping" or rattle on bumps, then you should see excessive
movement in the rubber of the mounts.
be sure the baffles in the muffler are'nt loose or some other exaust
a couple of uneducated guess's for you.
let us know.
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