Adaptive Equipment problems of the 2004 Honda Pilot

I have 2004 Honda Pilot lx. When traveling at about 30-50 mph. Hear and feel a vibration when at consistent speed. Seems as if it's coming from the bottom of the vehicle. Maybe from a drive shaft or propeller shaft or something. It's getting much and much worst as days goes by. I am worried something can come loose when vehicle in moving motion.

Transmission fail-description of problem: heat build up between the countershaft and secondary shaft second gears in the automatic transmission, eventually leading to gear tooth chipping or gear breakage. Contacted Honda and was told that there were no recalls for this VIN and because the service work was not completed by Honda they claim no responsibility for their design flaw. A very expensive engineering/design problem that was flawed from the beginning and then burdened/blamed by Honda on the consumer.