Join Date: Sep 2005
Location: San Tan Valley Arizona
Don't use JB Weld, as the flexible nature of the recovery tank will make the JBWeld want to separate from the tank.
Clean the area with sandpaper and some degreaser, and repair the crack with RTV Silicone rubber.
I don't own an XJ any longer, but I still think they are the best of all the Jeep products ever made. My XJ was my favorite vehicle in my 50+ years of driving.
So...I stick around and give advice.