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Old 06-04-2015, 03:37 PM   #11
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3.55 and from all the reading I've done, it really doesn't matter much which one you get with the 8 spd. The difference is only a 100 or so RPM at highway speed in top gear.... maybe 1 mpg difference. I do not want for lower gearing, and 95% of my driving is with no towing.

As others mention, if your driving involves a lot of short trips, gas might be better. Diesels like to get hot and it takes a while for the eco to get up to temp. If your commutes are 15 miles or more, the economy of this little diesel is amazing.
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Old 06-04-2015, 07:06 PM   #12
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If longevity is a concern I'd go diesel. I have 2 Ram 3500's. 1, 5.9 and 1, 6.7. They both have over a million miles and still going strong. (I pull rv's for a living )
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Old 06-04-2015, 07:23 PM   #13
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I have a '14 Ram Ecodiesel quad cab with 3.92 gears. Tows our Rockwood 2604WS with ease while getting about 14 mpg on secondary roads. Mileage goes down a little on the Interstates due to higher speeds. The truck always seems to be in the right gear and has more than enough power while the engine speed varies from about 1800-2600 rpm. It never seems to strain to do it's job. As others have noted, there's only about 150 rpm difference between 3.92 and 3.55. If you get 17" wheels with the 3.55's your overall ratio will be almost identical to 3.92's with 20" wheels.

I tow a 6 X 12 enclosed motorcycle trailer 1500 miles to Florida and average 18-19 mpg depending on terrain (cruise set at the speed limit). On the same route without the trailer (cruise set on 77 mph) I got 26.1 mpg. Around town on short trips i still average about 22-23 mpg. Do be aware that oil changes are very expensive (10.5 quarts of special low ash synthetic and a $45 filter from Mopar) compared to a gas motor, but oil changes are only due at 10,000 mile intervals.
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Old 06-04-2015, 07:34 PM   #14
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Quote:
Originally Posted by LandJ View Post
BTW... OP didn't mention if these were new trucks. If the Hemi doesn't have the 8 spd tranny, it will be much worse on fuel, and towing will be at significantly higher RPMs.

I have a 2011 ram 1500 hemi with the 355 rear end and 6 speed tranny. I pull a 8500 tt about 3-4 times a year as I use it for work traveling instead of staying in a hotel. I get 9-12 mpg ( depending on road, wind, etc) and 19-23 not pulling the tt. Power is never the issue. I was looking as the new Eco diesel but was gonna give it a couple years to get all the NEW bugs worked out. Hopefully by then they'll be able to have a better tow rating as they are only rated to tow 8400 I think.
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Old 06-04-2015, 08:01 PM   #15
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The new Ram 1500 has the lowest payload vs. the competition so it's hard for me to recommend either... Sounds silly, but my wife's Odyssey has more payload (1,255 lbs.) than an Ram 1500 Laramie Eco-diesel with all of the bells & whistles (around 1,000 lbs...)

In comparison, my Ram 2500 has the same 5.7 Hemi used in the 1500 but its payload is 3,000. If you stick with the Hemi, the 2500 is not that much more than the 1500. The extra payload allows me to bring firewood, kids' bikes, heavy/comfy chairs, enough water for a couple flushes, etc. without worrying about payload. Even upgrading our mattress & adding a fan added tongue weight... Remember, most of the stuff gets packed up-front in the pass-through storage or under the mattress...

My Ram 2500 w/5.7 Hemi gets 17 mpg on my daily commute & 10 mpg towing. My commute only costs me $1000 /year extra vs. my Honda Accord (40 miles round trip...) so an Eco-diesel or Eco-boost would only save me about $500 /year on my commute and $300 or so on camping trips... Not enough to justify the heftier payments...
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Old 06-04-2015, 09:46 PM   #16
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Exact tow ratings for diesel truck

The exact ratings on the ecodiesel Ram 1500 quad cab with 3.55 axle are 7950 lb tow capacity and 1620 payload.

The options on the truck are; backup camera, trailer tow mirrors and brake control, popular equip group includes cloth seats and mats, 8speed tranny, anti spin rear differential, disc player, and rear view camera. These are the same exact options of both vehicles. The hemi crew cab has the 3.9 axle. I am leaning towards the diesel since the price is almost the same even though the hemi crew cab is bigger.

Also ,are tow mirrors really needed.

Thanks for all you input so far.
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Old 06-04-2015, 09:56 PM   #17
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I'm happy with slip on mirrors. I wanted factory mirrors, but the price would have been a lot more for the truck that had them. In the end, I'm glad I didn't get them.
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Old 06-04-2015, 10:25 PM   #18
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X2 ... I like the slip on mirrors vs the big tow mirrors..
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Old 06-04-2015, 10:41 PM   #19
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Quote:
Originally Posted by campbuzz98 View Post
Which would you chose?
My vote goes to the Hemi but that's just me.

Quote:
Originally Posted by campbuzz98 View Post
Are tow mirrors a total necessary?
For safety's sake... yes.

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Old 06-04-2015, 10:59 PM   #20
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I'd choose diesel any day of the week. But, that's just me. Sometimes diesel may cost more; but, you get better mileage.


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