Originally Posted by jcf
Easy, warm them up with a hair dryer & they peel right off
^^^ This. Then clean the glue off your Jeep with Goo-Gone or rubbing alcohol. I just removed all my stickers and put on some Pro-Tek tree stickers a couple weeks ago.
Also good to wax the area where the stickers were when you're done, to make it as uniform as possible.
Here are some of the ways others have done it:
Completely Remove Stickers/Emblems
See sunnykk's post (#5) in thread below for how to remove the Trail Rated badge. Did this yesterday, and his advice is right on the money.