I just got my 2011 Ram and I've been out of the diesel world for the last 4 years so I have a lot of catching up to do. My last truck was a 2005 so my 2011 is a whole new critter to me!!! How does one go about getting rid of the whole exhaust system on one of these new trucks? Won't it void my warranty? Surely there is something that can be done. :-{}
Well, it all depends on what you want to do.
First off, it is illegal to tamper with any emissions system on any vehicle. In saying this, that will vary by state.
So you have two options. If you are wanting performance but with leaving the DPF in, contact ATS Diesel or Banks. Both have systems for DPF in and are also working on a performance DPF that works similar to a high flow cat on a gas powered car.
In the event you want to engage in "off road" :-laf use of your truck, removal of DPF is a 1 hour job. Contact companies like H&S Diesel as they offer complete kits that are easy to install
A quick run down on how the DPF functions: You have a little self bake oven under the truck that has a fine filter honeycomb. When soot travels down into it, the particles attach itself to the honeycomb. There are two air pressure lines that monitor DPF flow. One pre and one aft of the DPF. When the sensor (air lines run to side of trans - this also allows time for the air in the tubes to cool) reads a big enough pressure difference, the truck goes into regen mode. This entails raw fuel being injected into the exhaust stroke and it being ignited in the DPF. This burns out the soot. When pressure levels are normal again, the regen cycle is complete.
So back to your question: removal for off roading or if your state allows.
1 - First, take out DPF and replace with strait pipe. Also remove both pressure lines that run to trans mounted sensor.
2 - Unplug EGR valve. I have not played under the hood of a 2010 yet, but if it is the same motor I gather it to be as a 3rd gen 6. 7, just unplug the EGR wire harness. EGR is now disabled 90%.
3 - Technically, your truck will now run DPF free. But the catch is your computer will realize some body parts are missing. It will send fault codes etc that will illuminate the Check Engine Light (CEL). You need a computer/tuner to fool it. Will take about 30 min to download onto your truck computer. The way it works is you plug in a tuner to the OBD port and it will translate the error codes. To put it into english? It gets the code in one ear that says BAD! BAD! MISSING PARTS! FLASH CEL! and says ALL IS GOOD! CARRY ON! out the other. The added bonus is now you also have your tuner so here is to more power!Oo.
As to your last question: Warranty. Yes, removal of DPF, addition of tuner, etc will FOR SURE void your warranty! :{ As durable as our trucks are, they were not designed to run a 200hp/600 tq tuner shot of fuel.

The trans will eventaully fail, the clutch will slip if it is a stick, and other parts may break (like diffs, t cases, motor parts). And the dealer cant be expected to cover that as it is outside of what Dodge designed the truck to handle. As for the DPF, yeah, your dealer will have a hard enough time working on it when the tech sees harness' unplugged underhood and a bulk connector plugged into his diagnostic port!

Even more fun when he unplugs this as he is clueless to its function and now he is getting codes left, right and center. Even better when he does the newest engine flash from Dodge and the motor now does not run right even when the tuner is plugged back in (the newest Dodge software over writes the tuners data).
I have also heard from others, that due to the extreme cold temps in the interior of Alaska, that DPF and regeneration efforts do not work well. Does anyone else with a 6. 7 have any input on extreme cold and the 6. 7 cummins?
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The DPF burnout cyle is based on heat. Extreme cold does not make its life easier. The other thing that contributes to extra soot (meaning more of the material that is trying to plug it) is very cold burn temps in the cylinder. Very cold outside temps again do not help here.
The DPF system likes HARD work. Heavy towing, high extended lengths of 1000F pyro runs. Running WOT up a hill with 15K lbs behind you will be much better for your emissions system than sitting there idling (another thing your DPF does not really like).
All this adds uo to a plugged DPF. These trucks are designed to work. Get out there and run the truck hard. That is what it likes.
How often do most of the trucks "regen"? Is this once a month kind of thing or is this a once every 6 months? I assume it depends on how much driving, pulling, and idleing your truck does. How does the Regen work and how long does it take?
First, see above and see the link.
As for the regen, it all depends. If you are doing cross country towing all day every day, not often. Maybe a time or two a day (provided the pryo is running warm enough that it is self baking itslef more or less all day). If you are using it as a daily to commute 10 miles to work so it barely gets up to temp before shutting it off, with extended winter warm up before and after work, you will regen every chance it can get! :-laf
Robert