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Old 09-24-2020, 05:42 AM   #113
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Learned something. I've got a 2017 Silverado 3500 SRW dual cab diesel 4WD. Never tried running tires at 50psi when not towing. Does it make that much of a difference from the normal 80psi? Thanks. Ed
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Old 09-24-2020, 05:46 AM   #114
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Quote:
Originally Posted by swavescatter View Post
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.

F250 -
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.
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Old 09-24-2020, 08:55 AM   #115
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Originally Posted by edaa53 View Post
Learned something. I've got a 2017 Silverado 3500 SRW dual cab diesel 4WD. Never tried running tires at 50psi when not towing. Does it make that much of a difference from the normal 80psi? Thanks. Ed

Absolutely! The higher psi are needed for load carrying capability when towing/hauling, but they make my trucks rear end hop all over the place when I'm empty. Running 55 or so is much more comfy.

Your fuel mileage will go down a bit though. So for long highway trips and hauling I run the manufacturer specs.
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Old 09-29-2020, 10:27 PM   #116
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Follow up to questions about my post F-150 vs F-250

Thank you all for responding to my original question. I have thought about your responses. If I were to only camp in IN, Ohio, Michigan, and IL I would keep the the F-150 that I have been quite pleased with. However since I want to travel the country to visit all our tremendous national parks, I've decided to take the risk with some of my retirement money to get a F-250 with a 7.3 gas engine, a hopefully more solid ride, and about 1000 extra pay load pounds. I won't know how I will evaluate my decision until next spring when I head across the country, but I will provide an update when that happens. My next step is to think through the PSI issue. I will also review the PSI posting inside the door and then figure out what to ride on without the TT and what to set it on when towing. Will let you know about that too in the future. Thanks again for responding. Given these times we live in, I am encouraged with how all of us who share the road and love to camp help each other out. Best to all!
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Old 09-30-2020, 05:05 AM   #117
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Originally Posted by edaa53 View Post
Learned something. I've got a 2017 Silverado 3500 SRW dual cab diesel 4WD. Never tried running tires at 50psi when not towing. Does it make that much of a difference from the normal 80psi? Thanks. Ed
Put a load on. Years ago I had a early 80s F-350 regular cab, long bed, 4wd, gas 400cid with 4 speed trans. Empty would loosen fillings on anything but silky smooth roads. I would carry 4 bales of hay in the back just to dampen the load some, made a world of difference. Never towed anything with that truck but sure carried lots of heavy loads and loaded it was much more civil. MPG never seemed to change much loaded vs empty. 12mpg.

Tire pressure will change civility also but be sure to raise when towing. Under pressure will overheat and cause premature failure.
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