The theory was formulated in the 1960s and 1970s as new information was obtained about the nature of the ocean floor, Earth's ancient magnetism, the distribution of volcanoes and earthquakes, the flow of heat from Earth's interior, and the worldwide distribution of plant and animal fossils.
Loose or worn out tie-rod ends can be the cause of death wobble. To test them, jack up one tire at a time grab the tire at the three oâclock and nine oâclock positions, then try to turn the tire back and forth by alternatively pushing and pulling on the tire. Any movement indicates warn out tie-rod ends.
Check your wheel balance. Have a tire shop check and rebalance your wheels. An off balance wheel can cause lots of vibration. This is a cheap fix if it's your problem. Replace your shock absorbers or struts. Worn struts or shocks can cause an uneven driving condition and can result in shaking, porpoising or bouncy ride.