2019 F450
Posting Guru
Joined: Aug 2015
Posts: 2,399
Likes: 12
My 17 F450 pulls very strong to 3000 RPMs. I pull Sidling hill (biggest in MD) two mile 6%+ grade at 70 MPH at 26k# around 2700 RPMs
Posting Guru
Joined: Aug 2015
Posts: 2,399
Likes: 12
After a minute or so WOT up mountains in the summer, I'll hit 225* and the fan will engage loudly for several seconds while the temperature drops to 220* or so.
Senior User
Joined: Sep 2017
Posts: 179
Likes: 0
My 450 and 5th wheel gross out to 34k combined, towing on 285 in Colorado it likes to spin 2800rpm or so in 4th up the passes. Seems logical to me that under that type of load it's going to pick the hear that let's it spin at the peak horsepower. And yah the fan starts screaming 
Even better is back down the other side in 3rd gear holding all that weight at 45mph or so without really having to use the brakes. Makes it so confidence inspiring.
With a lower combined weight of 24-26k the 3.55s could actually be quicker if it can pull the load in 4th or 5th in the meat of the power band. At my weight I use all the 4.30s have to offer.
Even better is back down the other side in 3rd gear holding all that weight at 45mph or so without really having to use the brakes. Makes it so confidence inspiring.
With a lower combined weight of 24-26k the 3.55s could actually be quicker if it can pull the load in 4th or 5th in the meat of the power band. At my weight I use all the 4.30s have to offer.
More Turbo
Joined: Oct 2005
Posts: 563
Likes: 71
From: Garner, NC
I've said it before and I'll say it again. On the interstates towing and running around 65-70 mph, my 2015 F350 SRW with the 3.55 had more passing power than my '17 F450 does. The 450 just falls on its face when you stomp the pedal at those speeds. My assumption was it just ran out of gear.
If my F450 had a 3.73 rear end, it would be the perfect truck for me.
If my F450 had a 3.73 rear end, it would be the perfect truck for me.
Senior User
Joined: Sep 2017
Posts: 179
Likes: 0
I figured the 26k comment above was combined.My 450 is by no means a sports car. I figured the sluggishness was expected pulling a 12ton billboard down the highway.
Honestly after I hitched up the first time and hit the road I remember thinking about all of these "you can't even tell it's there" comment and how wrong they were. I 100% know my 5th wheel is there (and the truck is a dog compared to unloaded) if I do anything more than maintain a constant speed on level ground.
Oh and this is with a 2018 f450 limited.
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Hotshot
Joined: Apr 2013
Posts: 10,120
Likes: 652
From: NH
Yeah all the “I didn’t even know the trailer was behind me” cracks me up. I feel my 7500lb box trailer every time I tow it and the truck is noticeably slower.
I highly doubt the 2018 is much different performance wise compared to the 2017.
I highly doubt the 2018 is much different performance wise compared to the 2017.
Elder User
Joined: Jun 2014
Posts: 932
Likes: 10
From: Tampa
My 16' F350 Dually did everything better than my 16' F450 except for u-turns. The 4:30's in the 450 were great for getting on the Hwy, all the way up to 84 mph.
Then it just stayed there, 84 mph .. and .. it'd make you cringe every time you crossed an expansion joint on the Hwy. Frik'n brutal.
Then it just stayed there, 84 mph .. and .. it'd make you cringe every time you crossed an expansion joint on the Hwy. Frik'n brutal.
Thread Starter
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Fleet Mechanic
Joined: Aug 2006
Posts: 1,764
Likes: 402
From: Logan, Utah
I've said it before and I'll say it again. On the interstates towing and running around 65-70 mph, my 2015 F350 SRW with the 3.55 had more passing power than my '17 F450 does. The 450 just falls on its face when you stomp the pedal at those speeds. My assumption was it just ran out of gear.
If my F450 had a 3.73 rear end, it would be the perfect truck for me.
If my F450 had a 3.73 rear end, it would be the perfect truck for me.
Thread Starter
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Fleet Mechanic
Joined: Aug 2006
Posts: 1,764
Likes: 402
From: Logan, Utah
Accelerating up to 40 even with my 45' toy hauler is pretty amazing. Maybe the grade thru Sardine canyon just makes the truck run out of gear.
Imagine the 4.88s the 08s had. Never drove one.
Imagine the 4.88s the 08s had. Never drove one.
