2025 Ram 2500/3500 6.7 Cummins

[Rowdy Dalton]

Well, let's talk about it. All kinds of big power numbers are out there, regarding the 2025 Cummins. I'm good with that, but still hesitant about emissions on the newer diesels. Also, I don't know how reliable switching to glow plugs will be.

 

[NIsaacs]

Some info here.

https://www.turbodieselregister.com/threads/zf-powerline-for-2025-ram-hd-diesel.274759/

https://www.turbodieselregister.com/threads/deletes-legal.275588/

https://www.turbodieselregister.com...the-engines-and-drivetrains-look-like.275542/

 

[Shiner]

Too many changes at once for me. Wait and see.

 

[Jim W]

My feelings on the glow plugs are this will be no different than the heater gid bolt issue on the trucks today. A lot to do about nothing.

I had glow plugs on my wife's Jetta TDI which we bought new in 2010. We never had an issue with them for 80,000 miles. My older son has had two different vehicles with glow plugs in them a 1999 Ford diesel and his 2011 VW TDI Golf, neither vehicle had any issues with the glow plugs.

They work and are a proven design. Now that's not to say there won't be a failure on some vehicles, simply because they are man-made and sometimes things do break.

 

[wyosteve]

We had a Chevy Duramax for a while and it had 2 glow plugs go bad in 40k miles!

 

[Diesel85]

Manufacturers have went through a lot of R&D on glow plugs throughout the years, including how to control them.

Lots of newer trucks micro-cycle the glow plugs to avoid getting them too hot, along with running them at what seems like the best voltage of 6-7 volts. Lots of the older stuff will run at 12v (or pretty much alternator/battery voltage) where they wind up cooking themselves quicker.

Heck, I got a 3rd Gen EcoDiesel, and I haven't read a report of a failed glow plug very often and it's been two years since they stopped making them.

Can't say they don't fail, but I wouldn't let it be a deal breaker either.

 

[User113]

Every decision is a tradeoff/compromise of some sort. And there is always new stuff to learn.

My 2005 Jeep Liberty with the 2.8L Common Rail Diesel originally came with 7v ceramic glow plugs; there are reports that the tips would sometimes break off in the cylinder and do bad things. Eventually Jeep came out with a 5v all metal version that fixes the issue, but it was NOT rolled out as a recall. I didn't have any issues with the ceramic ones in my Jeep for 180K miles, at which time I decided to replace them with the metal ones only because I had access to them when cleaning out the intake elbow.

Other than that one glow plug issue, all my other diesels use or have used glow plugs (Kubota RTV, Mercedes Benz 300SD, Mercedes Benz 350SDL, Volkswagen Beetle, Jeep Grand Cherokee EcoDiesel) and never had any glow plug issues. I'll bet there are way more engines out there today that use glow plugs than use a grid heater type system. Sure beats using a smudge pot like the olden days.

Fun fact, a friend of mine had an old Mercedes Benz diesel, probably from the late '60s or early 70's and instead of having a glow plug light in the instrument cluster it had an actual glow plug installed in the dash board itself facing the driver. Next to it was a switch that you pulled out to energize the glow plugs, which would energize the 5 in the engine AND the one on the dash all together. You had to turn the ignition switch on with the key then pull the "start" switch out to a first detent and watch the glow plug on the dash until it glowed a bright orange, at which point you would pull the start switch a bit farther to activate the starter motor. Once the engine started and warmed up sufficiently you would have to remember to manually push the switch back in to turn the glow plugs off. Luckily the plug glowing on the dash would serve to remind you.

 

[Rowdy Dalton]

I've been doing a bit of reading on this new 2025 Ram, and it has me tempted to trade in my 2006 2500 5.9 .
Have they finally worked out the bugs with the emissions problems?? Possibly. Have they improved the MPG with all the included emissions? No.
I have had lengthy conversations with Tow Truck Drivers, who run the crap out of their trucks, sometimes 24/7. The trucks that were say 4+ years old, or older, all had to have the emissions deleted, to become reliable and increase MPG. The newer ones are rarely touched, and go well over 300,000 miles with very little issues. Sometimes zero emissions related issues.
So, maybe after the first year of this new engine and ZF transmission model has proved itself, and the potential bugs are worked out, I might retire my 2006.
I will say, I have had a Jeep with a ZF transmission in it, for over 6 years, and that transmission is a beast.

.

 

[wyosteve]

I had a '19 Power Wagon with the ZF transmission and it was great.

 

[Cummins12V98]

My 19 Jeep GC shifts great until coming to a complete stop it very noticeably down shifts. Supposedly normal.

 

[Ozymandias]

My 19 Jeep GC shifts great until coming to a complete stop it very noticeably down shifts. Supposedly normal.

Have the dealer do a re-learn cycle, should be smooth as silk.
No matter what.

Or use Alfa and do it yourself.

 

[Cummins12V98]

Have the dealer do a re-learn cycle, should be smooth as silk.
No matter what.

Or use Alfa and do it yourself.

thanks for the advice. Talked to their trans guy, he said it’s normal.

I will see what my long time parts guy can do.

 

[opmmotorsports]

Well, let's talk about it. All kinds of big power numbers are out there, regarding the 2025 Cummins. I'm good with that, but still hesitant about emissions on the newer diesels. Also, I don't know how reliable switching to glow plugs will be.

I had a few BLUE OVAL pieces over the years, 1st 87, went 125k miles on the 1st set and over 200k miles more on the 2nd set, sold the truck. My 97 went 245k miles on the originals and was still starting fine the day it sold and drove away.

 

[Raspy]

Moving on to a 2025 Laramie 3500 Crew Cab Cummins, from a 2021 gas Tremor. Picking it up this weekend. I finally had a chance to drive one a few days ago and they are sweet. Great power and a more sophisticated transmission than the Aisin. This will be my fourth Cummins. A '93, a 2004, a 2014 and now a 2025. My only concern is the emission system, but I think that is improved over the 2014, and the 2027 might be much worse.

 

[Ozymandias]

I still wonder who has chosen a neurological disorder to name a Car..

 

[Terry]

I've only got 300 miles on my new limited so far but I'm really happy with my choice. It rides smoother than my old 2500 did but this truck does feel huge when driving it when compared to driving my old 1999. I can't wait to get the trailer behind it and tow it thru the mountain's.

 

[Rowdy Dalton]

I've only got 300 miles on my new limited so far but I'm really happy with my choice. It rides smoother than my old 2500 did but this truck does feel huge when driving it when compared to driving my old 1999. I can't wait to get the trailer behind it and tow it thru the mountain's. View attachment 143242

Sweeeeet!!!!!!


.

 

[Terry]

Sweeeeet!!!!!!


.

Thanks.
I sold my old Ram today to a very nice buyer, I hope he treats it like I did. I can hardly believe how huge these trucks have gotten.

 

[Ozymandias]

Yeah, stepping up from a Gen2 to a Gen4 is a huge lap forward, almost like centuries in between these two.

 

[Diesel85]

Yeah, stepping up from a Gen2 to a Gen4 is a huge lap forward, almost like centuries in between these two.

Every time I get in my 2000 Dakota from my 2020 1500 its like man... I feel like I'm getting into a classic truck. But the simplicity of the older trucks have their appeal. I still yearn for the stick shift, rolly pollys, and a simple no-frills radio like my Dakota has.

The day I move down south, I'm hunting to find a well taken care of 2000-2002 RAM Cummins. Although, there are times I keep thinking of selling my 2007 F150, and getting a new garage queen of that nature to replace it, even if it requires some TLC.

 

[Cummins12V98]

Later this week my 15 LongHorn towing machine will be parked until this fall. I really love it, but I also love my 01 Sport that I will be towing my boat and just running around until the 15 is needed to tow our home South chasing the Sun.