I have a click sound coming from my car, not a knock/tick from the engine. When i am driving i hear it up to 40 then it stops. It will also stop when i slightly off center the steering wheel. No clicking when turning, but at higher speeds i get heavy vibration that go away when i straighten up.
at first read, that sounds like drive axles that are starting to go bad.. maybe. look under the car and see if the boots on the axles are broken, and flinging grease everywhere.
vibrations could also be tire balance, but if they go away when you straighten, i doubt its that. maybe a suspension/shock thing, but not sure.
Sounds like a wheel bearing
ReD RaiN