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AlfaOBD DPF regen on 2025+ 3500s

hdVahn

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Good morning,

TL;DR - Does the AlfaOBD/bypass modules work on a 2025+ HD?

Context On Why I Am Asking / Use Case Follows
I think I am in the right place. I didn't immediately see an Emissions specific forum. As a former 2500 Hemi Power Wagon owner, I am about to make my first leap into the Cummins Diesel and move up to a 1-ton 3500 Laramie. Frankly, I am scared to death of the DEF/EGR (etc, etc) considerations. Before I take the plunge into a new, 80K+ truck, I wanted to ask about the AlfaOBD / security bypass / physical SGW bypass others have run on 2024 and early posts.

AI and Google searching tells me, it should work. But, I quote:

For your purposes buying a 2025 or 2026 Ram 3500 HD, the AlfaOBD path is almost certainly clean and straightforward using the same tools that have worked on HD trucks since 2018. I'd still recommend confirming with a quick post on hdrams.com before purchasing the bypass module — but the evidence strongly points in your favor.

So, here I am. I loved my HD Power Wagon and I'd like to stick with Ram as I go diesel, but I also want to put myself in the best possible position to manage the risks.

I believe I need the muscle and engine breaking for very recreational towing a toy hauler.

I have a different daily entirely, so it's going to be very low millage and most of it's 5000 mile a year pulls will barely be 35 minutes one way, sit all day, and come back another 35 miles at 45-55 MPH.

9-12 times a year, it will be 2-3 hour pulls, Usually, it's sitting in the driveway in the desert heat. with the occasional Home Depot run where it certainly won't get up to temp to do passive regen. I am up to speed on the need for higher maintence cycle, not letting DEF sit over, etc., all. I am starting to feel educated, but nothing beats real world experience.

Because I am only using occasionally using this truck as god intended, I really, really want to be sure I am thinking out this decision. I understand you can active a manual regen from the Infotainment system when soot levels are high enough, and perhaps this will be just fine for my use case.

I just don't have any real world experience with Ram HD diesel engines and, when you read up on this, or any of the BIG 3, you would get advice that you should get a gasser because you are not running your diesel engine truck enough for the diesel emission systems to do what they do naturally.

When I try and talk to people pulling heavy with a Godzilla 7.3 engine, I am told that's too heavy (16-17K GVWR) and I need a diesel.

So I am struck right in the middle trying to make a decision one way or the other. I've been through so many 1/2 and 3/4 ton trucks over the years, and I really would like to settle into something over-built for today's need so I stop under-buying what I need tommorow.
 
Last edited:
Good morning,

TL;DR - Does the AlfaOBD/bypass modules work on a 2025+ HD?

Context On Why I Am Asking / Use Case Follows
I think I am in the right place. I didn't immediately see an Emissions specific forum. As a former 2500 Hemi Power Wagon owner, I am about to make my first leap into the Cummins Diesel and move up to a 1-ton 3500 Laramie. Frankly, I am scared to death of the DEF/EGR (etc, etc) considerations. Before I take the plunge into a new, 80K+ truck, I wanted to ask about the AlfaOBD / security bypass / physical SGW bypass others have run on 2024 and early posts.

AI and Google searching tells me, it should work. But, I quote:

For your purposes buying a 2025 or 2026 Ram 3500 HD, the AlfaOBD path is almost certainly clean and straightforward using the same tools that have worked on HD trucks since 2018. I'd still recommend confirming with a quick post on hdrams.com before purchasing the bypass module — but the evidence strongly points in your favor.

Partially correct. Using AlfaOBD on 25+ trucks with the Atlantis architecture requires a supported scantool (xTool A30M is the goto), an AutoAuth subscription, and an OBD splitter cable to connect another OBDII reader to AlfaOBD. the scantool and AutoAuth is used to unlock the gateway instead of a simple cable used for 18-24 trucks. Most changes made to the BCM using AlfaOBD will require a Proxy alignment, which requires a dealer visit or investing ~$2K for a Mopar Diagnostic Pod (MPD) and WiTech subscription. While the basic setup may be able to perform stationary regen, a couple things to consider:
1. The xTool alone may be able to perform a stationary regen
2. It's really not an issue as the 25+ Cummins no longer use in-cylinder fuel injection for regen events, there's a 7th injector in the exhaust system. Consequently, oil fuel dilution isn't a concern on 25+ engines.

There's a long thread on 5thgenrams.com covering using AlfaOBD on 25+ https://5thgenrams.com/community/threads/how-to-use-alfaobd-on-2025.69849/unread

So, here I am. I loved my HD Power Wagon and I'd like to stick with Ram as I go diesel, but I also want to put myself in the best possible position to manage the risks.

I believe I need the muscle and engine breaking for very recreational towing a toy hauler.

I have a different daily entirely, so it's going to be very low millage and most of it's 5000 mile a year pulls will barely be 35 minutes one way, sit all day, and come back another 35 miles at 45-55 MPH.

9-12 times a year, it will be 2-3 hour pulls, Usually, it's sitting in the driveway in the desert heat. with the occasional Home Depot run where it certainly won't get up to temp to do passive regen. I am up to speed on the need for higher maintence cycle, not letting DEF sit over, etc., all. I am starting to feel educated, but nothing beats real world experience.

Because I am only using occasionally using this truck as god intended, I really, really want to be sure I am thinking out this decision. I understand you can active a manual regen from the Infotainment system when soot levels are high enough, and perhaps this will be just fine for my use case.
This is incorrect. Only Chassis Cab trucks can have a manual regen ordered or enabled by the dealer. A scan tool should be able to do a stationary regen. However, I don't believe it's needed for 25+.

I just don't have any real world experience with Ram HD diesel engines and, when you read up on this, or any of the BIG 3, you would get advice that you should get a gasser because you are not running your diesel engine truck enough for the diesel emission systems to do what they do naturally.

When I try and talk to people pulling heavy with a Godzilla 7.3 engine, I am told that's too heavy (16-17K GVWR) and I need a diesel.

So I am struck right in the middle trying to make a decision one way or the other. I've been through so many 1/2 and 3/4 ton trucks over the years, and I really would like to settle into something over-built for today's need so I stop under-buying what I need tommorow.
 
Thank you so for taking the time to walk me through some of this.

Activating a manual regen is really all I was thinking about ... and then I went down the rabbit hole of what I would need to do that with the assumption baked in my brain that I must have capability if I want to not hate a truck I otherwise am completely in love with right now.
 
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