F350 or Ram

OneLonelyBurrito said:
The 2025 Rams loose basically all passive regen because they moved the SCR in front of the DPF. So the regen distance will decrease and they will most likely have more DPF problems with the DPF behind the SCR vs in front of it.
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My 2014 ram doesn't meaningfully passive regen anyway. 24 hr regens are usually the thing. My impression of my dad's 2022 L5p is the same. As long as I can command an active at the end of a long trip (my 2014 won't allow it) if I know upcoming driving needs will not be ideal for an active, it's a nothing burger.

If they put the DPF last in line but add an indirect injector like GM and recent Fords (rather than post injection event) then I'm fine with that. Less fuel dilution is better for the motor.
 
johnmyster said:
My 2014 ram doesn't meaningfully passive regen anyway. 24 hr regens are usually the thing. My impression of my dad's 2022 L5p is the same. As long as I can command an active at the end of a long trip (my 2014 won't allow it) if I know upcoming driving needs will not be ideal for an active, it's a nothing burger.

If they put the DPF last in line but add an indirect injector like GM and recent Fords (rather than post injection event) then I'm fine with that. Less fuel dilution is better for the motor.
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When I say passive regen, I’m not talking about thermal O2 passive regen. I’m referring to NOx (NO2) regen, which is more meaningful than passive thermal. NO2 is able to oxidize the soot out at a much lower temperature than the typical regen. It occurs as low as 200C but is more prominent at about 350C, vs the 550C+ for the thermal O2 regen process. This plays a much bigger role than most people realize. Some of the semi truck manufacturers can basically solely rely on NOx based regen to clean the DPF.
 
OneLonelyBurrito said:
The 2025 Rams loose basically all passive regen because they moved the SCR in front of the DPF. So the regen distance will decrease and they will most likely have more DPF problems with the DPF behind the SCR vs in front of it.
Click to expand...
Sounds like a terrible idea. What was the rationale for doing this? They already have trucks with regen frequency issues, and massive fuel dilution, why on earth would they do this. I do like the fact that they got rid of the SO 6.7 and can only assume the ZF transmission will be better than the 68RFE.
 
6.7 CTD said:
Sounds like a terrible idea. What was the rationale for doing this? They already have trucks with regen frequency issues, and massive fuel dilution, why on earth would they do this. I do like the fact that they got rid of the SO 6.7 and can only assume the ZF transmission will be better than the 68RFE.
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It’s a fuel economy/emissions trade off. Moving the SCR closer to the engine makes the SCR reach operating temperature faster on the chassis emission certification tests. The chassis emission certification tests are very low load, so they don’t have very high exhaust temps and the SCR needs every degree it can get. That means every time you start the engine it would need to burn more fuel to heat up the SCR which ends up being more fuel than is required for the DPF to regen every few hundred miles. Now if you look the diesel engines that are engine certified, they all have the SCR behind the DPF because the load factor of those tests are much higher. So they don’t need the extra heat. Like Ford has previously had a different exhaust for chassis cert super duty’s vs the engine cert super duty’s. Hopefully that makes sense.

TLDR: Lower NOx emissions and better fuel economy is the reason on the specific certification tests that are required.
 
You learn something new everyday.

I can't speak for new diesels, but as for the trucks, my father recently bought a 2024 F350 with the base 6.8L gas engine. Very nice. Stable and comfortable. The thing I like most is the aluminum body though. No body rust is big selling feature. The downside is the body panels are very easily damaged.

I used to be a GM guy, but it all came down to seats for me. My 2012 was great truck, loved it. But the seats were so amazingly uncomfortable. It was a sneaky uncomfortable too. You wouldn't notice it in a trip down the street, but ride for more that 45 minutes and your were stooped over in pain. They had lumbar support but it was more like anti-lumbar. The fords are better. Not sure about the Ram, but they look nice.

As a poster mentioned above, its worth test driving and seeing what you like. FYI - when my father was shopping (bad time to buy a truck) the GM dealers nearby didn't have a 2500 or 3500 to drive. They offered to order the truck with a significant deposit, let him test drive, and if he didn't buy, they would keep the deposit. Hard pass. Ford had the truck on the lot. I don't remember why he didn't try a Ram.
 
I drove all of the brands when I was looking at trucks to tow heavy with. I went with the RAM as it's exhaust brake did a better job controlling the speed downhill. Nothing was more important to me than controlling a big, heavy trailer on mountain road descents. From videos I've watched, that is apparently still the case with up to the 2024's. The new drivetrain in the 2025 RAM I have yet to see any testing of. Mine has had no issues with the emissions system. It is the last of the solid lifter engines, it has the CP3, and the Aisin transmission has been great.
 
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fantastic said:
Isn't the Ram body & frame from 2010? At least that's what I read on YT comments. 2017 & above was a ground up new frame/body. I'm partial to Ford. I can't get the truck camper Ram that split the Frame out of my head but I'm sure there's more to the story & that was a very heavy camper.
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The Critic said:
Ram chassis in the HD segment is ancient. Ford and GM are far more competitive.
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New frames in 2019 for HD trucks per their press kit.

As for the split frame… my WAG is wherever they welded was high strength steel. Heat+high strength steel=BRITTLE

https://media.stellantisnorthamerica.com/newsrelease.do?id=20527&fIId=20520&mid=357
 
I wouldn't buy a new diesel of any brand. The new models require more DEF. Diesel fuel is more expensive than gasoline. The Ford with the 7.3 gasser would be my pick.
 
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