What are some signs of my struts going bad. Other then the knocking I can hear them do on good bumps. My car shutters a little at higher speeds (i.e. freeway 65-80) and I wondering if bad struts can do that.
Thanks!

oil leaking out, if you push down on the car and it bounces too much, noises,etc...

High speed vibrations are typically bad alignment or worn cv joints,bad tires.

or a collapsed shock causing the alignment to go out of wack

1998 dodge avenger 4 cyl AT
Mods are:
Not enough