I do not know if the plumbing to your tank is the same as mine, so yours may have different configuration.
I have 2 4.0s 2003 and 2011 both extended cabs. There is so much stuff going to the tank from the top it is really hard to drop the tank.
It took me several hours to replace the pump via dropping the tank on the 2011, plus I broke some connectors so it took me a couple of days to find replacement stuff. I replaced the sender by pulling the bed in the 2003, took me about an hour but i also cleaned and painted the frame rails on the back too.
There are a couple of problems with pulling the bed, you need a friend to help pull it off and a new set of mounting hardware.
If the mounting bolts are original, you will probably break them(unless you live somewhere without rust). The bed is not heavy, but too big to lift alone. I also recommend a 1/2" impact to take out the bed bolts.
I have 2 4.0s 2003 and 2011 both extended cabs. There is so much stuff going to the tank from the top it is really hard to drop the tank.
It took me several hours to replace the pump via dropping the tank on the 2011, plus I broke some connectors so it took me a couple of days to find replacement stuff. I replaced the sender by pulling the bed in the 2003, took me about an hour but i also cleaned and painted the frame rails on the back too.
There are a couple of problems with pulling the bed, you need a friend to help pull it off and a new set of mounting hardware.
If the mounting bolts are original, you will probably break them(unless you live somewhere without rust). The bed is not heavy, but too big to lift alone. I also recommend a 1/2" impact to take out the bed bolts.