F450 and F550 difference

[OhioPlower]

Im looking at a 08 F450 tomorrow, was wanting a F550 but I found a decent 450. Is the only difference leaf springs in the rear and a higher gvw on the 550?

[Flipper]

Different rear end in the F550. Larger housing and gears.

[MatthewG]

Not sure about your state, but in PA....

550 = 6 month inspection
450 = 12 month inspection

Just extra money to dish out

[oldmankent]

Originally Posted by OhioPlower

Im looking at a 08 F450 tomorrow, was wanting a F550 but I found a decent 450. Is the only difference leaf springs in the rear and a higher gvw on the 550?

It's not like a F250 vs. F350 comparison. There are definitely some differences between the F450 and F550 which give it a larger GVWR.