My dad said its some bushing in the back of the car, he lubed it one summer and the sound stoped, then he said it was too dry or something so it's going to come back, in no time the sound came back and now its like say the front left wheel goes over a speed bump, the right rear will creeek its soo annoying

How do I stop this?

 

could be strut mounts

 

Prob a bushing that needs replaced, what year is your ride? they tend to wear out over time throw a new set on that gal....

stealth

 

91, its happened since 97ish says my dad.