check u joints on driveshaft.
its may be due to a front in alignment. I have a 2003 durango and that was my problem
Yes, either can cause a shake while driving.
Yes, when idling and driving.
check the motor mounts
Loose Motor Mounts
I don't know you tell me.
replace front brake rotors and pads.
It needs an front end alinement or your tires & wheels need rotated
It might be a broken motor mount or transmission mount.
My Dodge Charger doesn't shake...
Tire imbalance or wheel bearing. tire(s) more likely.
Sounds like a misfire caused by electric supply to plugs.