RAM 3500 with HO 6.7L Cummins SRW

Walaby wrote:
I have a 2017 Ram 3500, 6.7HO and Aisen Trans.

I had a 2014 Ram 2590 6.7 as well prior to the 3500.

3500 gets probably 1.5-2MPG less than the 2500 when not towing.

Towing it's about the same.

Mike

Sounds spot on with what would be expected.

I have a 2017 Ram 3500, 6.7HO and Aisen Trans.

I had a 2014 Ram 2590 6.7 as well prior to the 3500.

3500 gets probably 1.5-2MPG less than the 2500 when not towing.

Towing it's about the same.

Mike

And yes, a new 3.73 HO will not get as good of empty cruising fuel mileage as a 3.42 standard Cummins.
But if they’re both srw trucks, the difference should not be huge. Maybe a couple mpgs.

Also, I’d wait for a 2024 model…..can’t say why, but anyone halfway well read about Ram’s current and future transmission options will understand.
I’ll throw out a clue. 12V says this will not be a worthwhile change….lol.

deltabravo wrote:
I've always wondered what the major differences are between the HO and Standard 6.7 Cummins. I have no clue because I've owned GM trucks and I don't know anyone that owns a RAM.

cummins2014 wrote:
. Never gave mileage much thought , truck was not bought for economy . Mileage towing as said is probably going to be about the same.

Best answer yet.
With that said, I sure wish my old school Duramax got better mileage, but I can't Justify the cost to replace it. It only has 75k miles on it.

You can get better mileage easily, but it’ll cost you a couple grand to do so (including exhaust). Delete that thing while you still can. The LMMs were the worst for fuel economy of all generations of that engine due to the early Tier IV emissions requirements and prior to the introduction of DEF into emissions technology. It’s that pesky 9th injector that is using up your extra diesel.

I've always wondered what the major differences are between the HO and Standard 6.7 Cummins. I have no clue because I've owned GM trucks and I don't know anyone that owns a RAM.

cummins2014 wrote:
. Never gave mileage much thought , truck was not bought for economy . Mileage towing as said is probably going to be about the same.

Best answer yet.
With that said, I sure wish my old school Duramax got better mileage, but I can't Justify the cost to replace it. It only has 75k miles on it.

4x4ord wrote:
^^^ I think it’s got to be a 3500 series with the Aisin …. the high output is only available in a 3500 series and is only available with the Aisin.

I was going to say ,it would be the Aisin if it's the HO . Like 12V said , that's a question to be asked before purchase if concerned . Never gave mileage much thought , truck was not bought for economy . Mileage towing as said is probably going to be about the same.

4x4ord wrote:
^^^ I think it’s got to be a 3500 series with the Aisin …. the high output is only available in a 3500 series and is only available with the Aisin.

I am sure it is also, OP should have said specifically what the tuck is for those who don't know all the backstage info.

His 15 has 3.42's unless changed as mentioned.

Highly unlikely he will get that good of mileage with the new ride.

I guess the topic did have some info "RAM 3500 with HO 6.7L Cummins SRW"

^^^ I think it’s got to be a 3500 series with the Aisin …. the high output is only available in a 3500 series and is only available with the Aisin.

More info on the new truck??? 3500? AISIN?

Have to say this is a question to have been asked if it really matters BEFORE buying the new truck.

2oldman wrote:
quote festival

Indeed. :)