Combining a Transfer Tank and Toolbox on an F250

[MikePhua]

Initial Question
A truck owner with a 2004 F250 asked for advice about adding a 50-gallon transfer tank in the bed of his truck. He wanted to know if he could also install a low-profile toolbox behind the tank without interfering with the tailgate or taking up too much space.
Community Suggestions
Several people shared their setups and ideas. One user mentioned using an L-shaped transfer tank that integrates a toolbox on top. This design helps maximize space because the toolbox sits over the tank rather than behind it, saving valuable bed length.
Others advised measuring carefully to ensure the tank and box do not extend too far back and cause clearance issues with the tailgate. It was pointed out that the shape of the tank and the size of the toolbox need to be compatible with the bed length and fifth wheel hitch if there is one.
Practical Experiences
Some users described mounting a transfer tank in combination with a crossover toolbox, explaining that it works well as long as both pieces are low-profile and properly secured. Another pointed out that it’s important to leave enough space for bed rails and the ability to see out the back window.
There were also discussions about safety and legality. One user highlighted that the transfer tank should be DOT approved if it will be used to haul fuel on public roads. Proper venting and secure installation were emphasized.
Final Takeaways
Combining a transfer tank and toolbox on an F250 is practical if planned well. An L-shaped or combo tank-toolbox design is space-efficient and keeps the bed usable for other loads. Precise measurements, legal compliance, and secure installation are the keys to a successful setup.