2025 Cummins what will the engines and drivetrains look like

[Turbo Terry]

Not much info out there yet. Wonder why that is . Neighbor wants to buy a new truck. 2500 no ho only ho in 3500 right will there be a 8 speed in both or can he still get aisin 6 speeds etc. no graphite block no more grid heaters glow plugs Tell me what you know Thanks

 

[Diesel85]

All I know is that I am going to sit back and watch what others do with their money.

While I'm eating my popcorn and enjoying my known working diesel truck.

 

[NIsaacs]

Have him read this thread. 1-7-25 will be some real info.

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

 

[AH64ID]

Not much info out there yet. Wonder why that is . Neighbor wants to buy a new truck. 2500 no ho only ho in 3500 right will there be a 8 speed in both or can he still get aisin 6 speeds etc. no graphite block no more grid heaters glow plugs Tell me what you know Thanks

Same engine and transmission for the 2500 and 3500, which are all considered HO.

 

[NIsaacs]

Just a guess but they will all likely get the 12" rear axle. Stay tuned to TDR for updates on 1/7/25 and on 1/10/25. I also expect MSRP will drop some over what it is now.

If he is computer savvy, he can go to the build guides that are posted here, to get a feel. The Ram build/price site will be active for the '25 HD's, soon.

 

[AH64ID]

Just a guess but they will all likely get the 12" rear axle.

I wouldn’t be surprised if that was true, but GM uses the 12” only in their 3500. Ford also has (or had, haven’t looked in a bit) different 250 and 350 axles even with the same engine. I suspect it’s all marketing. Ram may very well do the same.

 

[John Jensen]

Here's what I've recorded:
2025 Ram Cummins 6.7:
The High Output engine is discontinued
CGI block is discontinued and replaced with cast iron (NVH improvements)
3.42 gears only
430 HP and 1,075 ft lbs
New version of the CP4 HPFP
New turbo
Cylinder Head is revised – External injectors easier to service
ZF 8 speed transmission
Grid heater is discontinued and replaced with glow plugs
Oil canister and both fuel filters will be topside
New emissions system
Faster DPF heat (cold start emissions and no intake restrictions)
Dual alternator package is now 400A or 480A, was 380A or 440A
Possibly an entirely new driveline
No difference in cab structure (still a 2010 design)

Other 2025 additions:
14.4" Touchscreen Display (rhz)
Drowsy Driver Detection (xnm)
Traffic Sign Recognition (sjb)
Dual Wireless Charging Pad (cms)
Active Lane Management System (xnw)
Next Generation Engine Controller (nzd)
Pedestrian/cyclist Emergency Braking

2027:
7.2-liter coming for 2027 CARB and EPA emissions
Additional displacement needed for lower cylinder pressures

 

[AH64ID]

Here's what I've recorded:
2025 Ram Cummins 6.7:
The High Output engine is discontinued
CGI block is discontinued and replaced with cast iron (NVH improvements)
3.42 gears only
430 HP and 1,075 ft lbs
New version of the CP4 HPFP
New turbo
Cylinder Head is revised – External injectors easier to service
ZF 8 speed transmission
Grid heater is discontinued and replaced with glow plugs
Oil canister and both fuel filters will be topside
New emissions system
Faster DPF heat (cold start emissions and no intake restrictions)
Dual alternator package is now 400A or 480A, was 380A or 440A
Possibly an entirely new driveline
No difference in cab structure (still a 2010 design)

Other 2025 additions:
14.4" Touchscreen Display (rhz)
Drowsy Driver Detection (xnm)
Traffic Sign Recognition (sjb)
Dual Wireless Charging Pad (cms)
Active Lane Management System (xnw)
Next Generation Engine Controller (nzd)
Pedestrian/cyclist Emergency Braking

2027:
7.2-liter coming for 2027 CARB and EPA emissions
Additional displacement needed for lower cylinder pressures

Very comprehensive list.

From what I’ve read the SO is discontinued and all engines are considered HO.

I believe the 400A dual alternator setup is for the Hemi and the only dual alternator option for the Cummins is the 480A.

 

[NIsaacs]

Possibly an entirely new driveline

As in new drive shaft or new drive train? Can you elaborate about this?

 

[John Jensen]

As in new drive shaft or new drive train? Can you elaborate about this?

I wrote what I read. Unable to elaborate

 

[Grumpy8811]

after reading all of this , one thing I know for a fact is I have no desire to buy a new truck.

 

[AH64ID]

I wrote what I read. Unable to elaborate

I read the same, and also have not seen any elaboration. I would be shocked if Ram is going away from the AAM axles, so probably a comment about the transmission and not the entire drivetrain.

 

[Turbo Terry]

Thanks John I just shared with my neighbor. Only thing I like was fuel filters and oil filters under hood. I could still service about half my truck standing up at 75 years old

 

[Turbo Terry]

Looks some rather major changes. Wonder why

 

[Diesel85]

Looks some rather major changes. Wonder why

A lot has to do with emissions, unfortunately.

I am hoping this newer design will help with all kinds of driving scenarios. From folks that like to idle and do lots of city driving, to long haul and heavy operators with hopefully less soot related problems.

I'm wondering since they went to a different bladed turbo, if they also went with a different actuator too?

One thing no is talking about in depth is the emissions piece. Is it an electric heated DPF or a traditional...? and if it's traditional, did they perhaps do a 7th injector setup or are they still doing the dump more fuel method. I'm hoping it's electrically heated, because that makes sense.

I can't wait to test drive one this summer and watch these here forums.

 

[AH64ID]

I thought I read it was electrically heated, but that sounds more like a marketing ploy than anything. The amount of amps it would take to heat the DPF faster than several hundred degree exhaust would far surpass the capabilities of the alternator.

It would be nice to see a 7th injector.

 

[John Jensen]

I thought I read it was electrically heated, but that sounds more like a marketing ploy than anything. The amount of amps it would take to heat the DPF faster than several hundred degree exhaust would far surpass the capabilities of the alternator.

It would be nice to see a 7th injector.

The alternator could easily load up a large capacitor between regens. Wouldn't that work to get it electrically heated? Or would that be too short of an electrical blast?

 

[AH64ID]

The alternator could easily load up a large capacitor between regens. Wouldn't that work to get it electrically heated? Or would that be too short of an electrical blast?

I think it would be too short. The DPF needs to be above 650°F for passive regen, that’s a lot of energy.

I’m definitely curious to see how it works and what kind of heating element is used.

 

[John Jensen]

I think it would be too short. The DPF needs to be above 650°F for passive regen, that’s a lot of energy.

I’m definitely curious to see how it works and what kind of heating element is used.

I thought we were talking about an Active Regen. Typo?

 

[AH64ID]

I thought we were talking about an Active Regen. Typo?

Minimum temps are the same either way, but this is the quote I was thinking of “This electric heater system should also come up to temperature very quickly, before the engine warms up.”

Think about how much electricity an oven takes to heat stagnant air to 350°, and we need flowing air to be above 650° and closer to 1000° for a quick regen. I haven’t seen the specs on it, but it just seems far fetched to think it will eliminate need for extra fuel as I’ve also read about.