Originally Posted by swavescatter
I looked into this a bit more.
For the 2017-2019 models I don't believe this is true.
Rear blocks are the same. I think they changed this in 2020 as the 250 is lower by 2" again.
Also I've heard different things about the rear axle. They might all be Sterling with the 350 getting a bigger ring set.
Also the 350's appear to have one more leaf spring (in addition to the helper springs).
The bottom line is that the ride difference is negligible if you equalize tire pressure. When not towing, running 80psi is crazy. Even 65psi for me knocks out fillings.
Set both trucks at 55psi and they'll ride like forklifts with pneumatic tires, instead of solid tires.
I was mainly researching 2020 models, but there is a difference axle wise in the previous years so I probably should have looked at those as well.
2011-2016, the Sterling 10.75 was standard.
2017-2019, the Sterling 10.75 was standard with the non-HD Tow package. Dana M275 was standard on trucks with the HD Tow package.
F350 SRW -
2011-2016, Sterling 10.5 standard, option for a Dana/Spicer M275
2017-2019, the Dana M275 was standard.
F350 DRW -
2017-2019, the Dana M300 was standard.