Back end shakes, but less with more weight in the back

[shizon]

I get a shake from the back whenever I drive. All speeds. I've noticed though, that it's much worse when I am low on gas. When I fill up, it gets much better, but still not good.

Anyone help me on this?

 

[KEbert]

Your shocks could be gone. Factory Ford shocks lick (elbows) Get some Bilsteins.

 

[Stephen S]

Maybe a rear tire out of balance?? Try getting them balanced, or swap the front tires with the rear tires and see if the vibration follows a tire.

 

[shizon]

Forgot to mention it's a AWD with the factory air ride suspension.

I heard the shocks are outrageous.