F-250 & F-350 gear ratio question ?

[Smokin 6.0]

I have a 2018 F-250 long bed with 3.55 gears and it struggles sometimes to pull my horse trailer that weights 21-22k lbs with horses in it. Looking at a 2018 F-350 dually, but noticed the real axle says 3.55 std. Is this a good upgrade or am I going to have the same issues ? Don’t want to trade it and have the same problem. Any help is great !

 

[Mark Kovalsky]

If both trucks have the same engine, the F-350 will be worse than the F-250 because it weighs more.

 

[TrickTruck]

The 350 vs 250, the 350 has a slightly higher load carrying capacity (suspension) it is otherwise identical. I'm surprised you feel it struggles. I have a '16 w/ 3.55 gears and tow a heavy toyhauler. We gross 25klbs. That's a heavy horse trailer for sure tho, probably 4k more than I tow. I think your best bet would be a tune for the truck to tighten up the transmission. Maybe a 'weight loss' program too.

 

[Smokin 6.0]

I was surprised to. I have gone up a few slight grades here lately and seem to drop mile per hour. It didn’t use to do that and I’m also avg. 8-9mpg which is a lot worse than I use to about 20k miles ago