02 Rendezvous CX AWD with a loud vibrating noise when I accelerate
First check your serpentine belt tensioner, make sure it is operating properly and not bouncing the pulley while the engine is running, if it is replace it, then check your belt for missing ribs or large cracks, next check the vibration damper, look for any signs of deterioration, like little pieces of rubber hanging loose or wobbling when running.
I had my mechanic check the stuff you suggested, everything looks fine but still making the noise.
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