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wtmtnhiker's avatar
wtmtnhiker
Explorer
Dec 05, 2013

Dodge Ram Laramie 3500 Diesel

Hi all,
Don't want to get into the Ford, Dodge, Chevy debate here. I have a Chevy that I'm getting rid of and looking at a new Dodge Ram 3500 Dually 4WD crew cab long bed with a Cummins Turbo Diesel. It takes DEF fluid which I have no experience with. I know it's an extra expense and pia but is it really that bad to deal with? Also the dealer said it had an Isin (sp?) trans. How is the Isin for durability/reliability? If any of you own a similar vehicle what can I expect for mileage while towing? Thanks.

24 Replies

  • Hiking Hunter wrote:
    I got around 750 MPG while towing, and it's relatively cheap - less than $3 per gal. I think you can get >1000 MPG of DEF when not towing.


    Too bad they can't make the truck run off DEF completely :B
  • That's my truck - 2013 RAM 3500 long bed, 4WD, crew cab Laramie, Cummins Turbo Diesel with the Aisin transmission, cherry red in color. Had it about 3 months now.

    Like ScottG said - DEF is not a big deal. The truck holds 4 or 5 gallons of DEF. I got around 750 MPG while towing, and it's relatively cheap - less than $3 per gal. I think you can get >1000 MPG of DEF when not towing. They sell DEF at most gas stations in containers, and dispense it at most truck stops.

    Fuel mileage - towing = 10.5 to 11.5, typically. I actually got 12.8 once, but that was unusual. Not towing = 18 - 19 MPG interstate, but I haven't measured it but on one long trip.

    The Aisin transmission is a "heavier duty" transmission; from what I hear it was made to compete with the Allison transmission.

    I Love the exhaust brake on the RAM!
  • DEF is not a big deal-most Flying J truck stops have it at the pump (big truck fuel lanes)last time I got it,2.69 gal took 8.30 worth- the Aisin trans is the heavy duty tranny in the lineup-also gives you 385 HP & 850 lb ft of trailer towing torque!-whsk
  • DEF is a fact of life and no big deal at all.
    The "Aisin" is a proven medium duty truck trans that you have no reason to worry about at all. All in all the Aisin is as stout as the the Cummins and the most HD trans offered in a PU truck.