Normally a bent wheel or tire out of balance.
I was told by a buddy of mine who's a GM Master Tech that it's the Universal Joint in the axle. He said I'm better off just replacing the axle with a reman for a few dollars more.
shake
Another word for vibrate or shake is tremble or quiver.
shake
shake
A worn out Universal joint in the rear driveshaft.
Low pressure in the tires can cause shaking, the alignment can cause shaking also.
Worn steering parts, worn suspension parts, tires out of balance, out of alignment,
to quiver or shake a lot and to vibrate
to quiver or shake a lot and to vibrate
You shake it till you make it!
I assume that when you are about to be eaten by a Grizzly, you would indeed shake-up or vibrate...