I have a fabtech lift on my truck and when it is in 4wd I get a vibration. This is from cruising around 15-20mph. And then again when I am about to come to a complete stop. I have not tried this at higher speeds.
My question is...... Is this common on lifted trucks? Sometimes in the desert I have to get on the throttle to get through soft sand. I want to know if this is bad for the truck.

 

No one has this issue....?