40 Gallon After-Axle Utility Tank for Ford Super Duty

40 Gallon After-Axle Utility Tank, fitment-checked

After-axle rather than mid-ship, which is a different position under the truck entirely, and the exclusion follows from it: trucks with a rear-mounted water separator will not take it.

An after-axle tank sits behind the rear axle rather than between the frame rails ahead of it, which is why the things that conflict with it are different. Here it is a rear-mounted water separator: 2017 to 2019 trucks fitted with one will not take this tank. Coverage is the Ford F-350, F-450 and F-550 Super Duty from 2011 to 2019: the chassis-cab sizes rather than the lightest Super Duty. Capacity is 40 gallons.