Originally Posted by Stan
Not sure about the newer units but my '07 Grey/black tanks have a rib that runs the length of the tank on both sides. As I recall, it sticks out about 1" and is about 1-2" thick (high). This rib sits on a piece of angle iron on both sides. Don't remember if there is any strapping or not in addition to the rib and support. There was no bottom support on mine.
My unit is an 06Cross Terrain and sounds similarly mounted to Stan's.
With a full black tank, the L angle iron supports flipped out and let the black tank drop down on top of the generator exhaust pipe. What a mess as you can imagine!!!
I pulled back the alum strips and underbelly, and put a gusset system between the black and gray tanks to further secure and prevent future problems.
I would not drive very far or on rough terrain with full gray/black tanks.
Bob and Better Half
2007 F-250 PSD, SW, CC, LB, 2WD
2006 TF32SS Cross Terrain Toy Hauler (sold)
Reese 16k slider