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Old 01-09-2019, 07:19 PM   #1
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Ram 2016 3500 6.7 Cummins with 3.42 rear

I am considering buying a 2016 Ram 3500 dually with the stock 6sp transmission. However it has the 342 rear. My 2016 Keystone Sprinter weight is approximately 12,500 loaded for camping. Talked to someone with a similar type truck and he said he was only getting 6mpg. This seems really low. He also said his trailer weight was about 17K. Anyone with experience towing with the 342 rear and approx 12 to 13 K weight?
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Old 01-09-2019, 07:37 PM   #2
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If that mileage is true, I'll be happy to keep mine....this unit gets 14.4 towing and 22 empty, and we weight bout the same...and has the 3:42 ratio
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Old 01-09-2019, 07:45 PM   #3
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No experience with your specific truck trailer combo but 40 years towing various boats, trailers, 5th wheels with various vehicles.

6 mpg is low. I had a 2012 F-450 4:30 gears towing a 15,500lb 5th wheel. With the wind I got 11.2 and into the wind 9.5mpg. No wind 10.5mpg. I would expect that 2016 Ram to do better than the 2012 F-450.
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Old 01-09-2019, 08:48 PM   #4
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342 rear

I think the difference in our weights would make a difference 12.5 and 17K is a big difference in weight. He was also towing to Sturgis, ND. A lot of hills.
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Old 01-09-2019, 10:08 PM   #5
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That gear choice blows my mind in a dually. I have a 17 3500 srw for a work truck. My understanding is that all the srw trucks come with the 3.xx something or other gears. 3.42 sounds about right. On the pa turnpike from new jersey to pittsburgh it gave me 8.5mpg pulling our jayco 324bhds under 10k. It does have a ranch hand...the big full bumper, not just an add on brush guard. Our 5500 series were getting around 6 pulling 25k lbs. Those were 2011 ish trucks but the only difference is gearing. The engine/trans are the same. Being a 2016 i dont know how much warranty you have, where you travel, or where you live, but ive heard word that some programmers and other options can return way better mileage.
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Old 01-09-2019, 10:36 PM   #6
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Getting 8-10 mpg towing 13000, 3.42 and automatic, didn't think you could get 342 in dually, thought 373 or 410.
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Old 01-09-2019, 11:36 PM   #7
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2016 RAM 3500 DRW...6.7L CUMMINS

Come with:
3:42, 3:73, 4:10



3:42 with 6 speed auto should be getting 12 mpg towing UNLESS towing at 70+ mph
Weight is NOT a big factor...wind resistance and driving habits are


I tow 14K with 5.9L CUMMINS ---4:10/4 speed auto and get 10-11 mpg
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Old 01-10-2019, 06:50 AM   #8
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342 rear

It does seem odd to have that high a rear but itat is what the dealer said, Also what someone told me he had. It's a 6.7 not 6.6, I currently own a 05 Silverado with a duramax. Force of habit.
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Old 01-10-2019, 07:27 AM   #9
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There is 6 mos of bumper to bumper and 60K miles of powertrain factory warranty left. I understand using a programmer would void the warranty.
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Old 01-10-2019, 08:14 AM   #10
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Originally Posted by mwaroley View Post
It does seem odd to have that high a rear but itat is what the dealer said, Also what someone told me he had. It's a 6.7 not 6.6, I currently own a 05 Silverado with a duramax. Force of habit.

Well if you have the VIN number you can run it through this WEB page and get a complete equipment listing with Trans and gear ratio.


https://fcacommunity.force.com/RAM/s/equipment-listing
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Old 01-10-2019, 11:12 AM   #11
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Quote:
Originally Posted by mwaroley View Post
I am considering buying a 2016 Ram 3500 dually with the stock 6sp transmission. However it has the 342 rear. My 2016 Keystone Sprinter weight is approximately 12,500 loaded for camping. Talked to someone with a similar type truck and he said he was only getting 6mpg. This seems really low. He also said his trailer weight was about 17K. Anyone with experience towing with the 342 rear and approx 12 to 13 K weight?
I would go over to Turbo Diesel Register .com pay the $35 for a year membership and ask this question. You will also receive and become more knowledgeable about the Ram Cummins Diesel trucks then ever.
P.S. I have been a member since 2008 and I am still learning about the new trucks.

Now my take on the gentlemen who you were talking to has a major issue with his truck. I do not know of anyone who has a modern day diesel truck that is seeing that kind of low fuel mileage.

My 2008 Dodge 6.7L Cummins which is running 60HP/120TQ over stock. When towing my 34RL Cedar Creek 13.5 inches high, into a 30 to 40 MPH head wind, hand calculated was getting 10.4 MPG.
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Old 01-10-2019, 11:34 AM   #12
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I would not buy a drw with a 3.42 gear. 3.73 at a minimum.

Tow ratings change with gear ratio. Check those number with what you plan on towing and buy appropriately. BTW dont take the salesman's word. He most likely does not know.
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Old 01-11-2019, 08:24 AM   #13
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There is 6 mos of bumper to bumper and 60K miles of powertrain factory warranty left. I understand using a programmer would void the warranty.

Well, I see no need for a programmer, ours is a 2016 with Aisin and 3.73's, 385 hp and 900# of torque. Haven't towed with it yet, but expect to feel a nice difference between it and our 2001 with maybe 300 hp and 600#+ of torque with 3.55' and a 5 speed manual.
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Old 01-12-2019, 10:01 PM   #14
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I have a 2013 2500 6.7 with the 3.42 rear end. I pull an ORV at about 10,000 pounds plus or minus without any trouble at all. I get around 12 - 13 mpg going 62 or 63ish. Also, while you have six gears you don't have to run in 6th. In fifth that engine is right in the sweet spot going low 60's. That's around 1800 rpm. Again 12 -13 mpg. 6 mpg sounds wrong to me. Something else is happening.
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