Hey all,
I drive a 00 GS300 with 31k miles.
When I drive on the highway around maybe 70-80mph the car starts to rock a little bit back n forth. Anyone know the cause of this? Do I need to replace my suspension? or mayb install an upper sway bar, and mayb replace the lower one?

 

What's an upper or lower sway bar? there's only 1 sway bar for front and 1 for rear.


I assume when you say back and forth, you mean rolling side-to-side and not really front-to-back

Either way, your best bet will probably be replacing the shocks.

Sway bars help resist roll motion, but only kick in as you go deeper into a roll. When you are going straight or just at the beginning of a turn, they are mostly unloaded.