I know it has been a couple months since I last posted on this problem. Been too busy to really look under the car until recently.

When doing the oil change recently, I looked over the under side of the car from front to back with the engine running. There are no leaks or cracks in the exhaust system. All the shields are in place and secure. All the exhaust hangers are present and intact. All the exhaust system rubber parts are present and intact. There is nothing on the engine or drive train touching the body or frame of the car that can transmit this kind of vibration. Just the usual hoses and wire bundles going between the engine and body, and all properly secured.

The inside of the car almost sounds like the engine is bolted to the frame, yet all the engine mounts are new. I even tried a couple different types of engine mounts, and there is no change in the noise.

Any other suggestions?

--
Gary D