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  1. #1
    Setting Up Camp
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    Gear Ratio for Ram 3500

    Iím looking at a 2015 Ram 3500 with 4WD and DRW to pull my GD Reflection 320MKS (loaded weight 13,995 lbs.). The rear axle ratio is 3.42. Would that be a good choice?

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    I should have mentioned that the Ram is a 6.7 diesel.

  3. #3
    Long Hauler geotex1's Avatar
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    Depends. Which transmission does it have? The AISIN or the 68RFE? More generally, that is highway gearing so you won't be snappy off the line with that load on back and it'll be harder pulling the hills.
    Rob & Nikki + Cloverfield
    2020 Grand Design Solitude S-Class 3350RL
    2015 RAM 3500 Longhorn Laramie Crew Cab, Long Bed, 4x4 Dually Cummins/AISIN

    Mountains of Pennsylvania

  4. #4
    Site Sponsor
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    I would want a 3:73 minimum.

    My two cents.

    Red
    Location - Wherever the road takes us...Full-timers
    2015 Momentum 380
    2019 Ram Dually

  5. #5
    Setting Up Camp Mjmnklm's Avatar
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    Quote Originally Posted by Dave Jenkins View Post
    Iím looking at a 2015 Ram 3500 with 4WD and DRW to pull my GD Reflection 320MKS (loaded weight 13,995 lbs.). The rear axle ratio is 3.42. Would that be a good choice?
    Hey Dave. The previous two comments are good info. There's not enough about your truck to know exact numbers. Your best bet is to check the stickers on the door sill or go to MyMopar and put in the VIN. The least a 2015 3500 DRW will pull is 16,660. That's a CC, LB, 4wd with the regular output 6.7 CTD engine and transmission. With a 3.42, I would really think you'd be better off with the HO engine and Aisin transmission which changes that max tow to 20,510 lbs. Payload on a DRW is not an issue if you're pulling a 320MKS. Either way, your truck should be able to do what you want. It's just a matter of how hard it will have to work to do so. Here is a link to the page for 2015 RAM 3500 towing and payload capacities https://www.ramtrucks.com/assets/tow...ing_charts.pdf
    Last edited by Mjmnklm; 04-06-2021 at 01:24 PM.
    2021 GDRV Reflection 320MKS 5ver (hauled by The Beast)
    The Beast - 2019 RAM 3500 Longhorn, CC, LB, DRW, 6.7L Cummins HO, Aisin 6spd, 4wd
    Previous: 2005 Minnie Winnie Class C towing 2014 Mini Cooper Countryman S (both 4 sale)

  6. #6
    Seasoned Camper
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    My 15 2500 has 3.42
    I pull my 380th with it and it does just fine. Could there be better, of course. My new drw I bought has 4.10
    I would say if you donít mind the rpm 4.10 all the way for the most grunt.
    A happy medium for towing and highway non towing would be 3.73
    However I will say the only reason I have 3.42 is because there was no other option in 2015.
    Will it achieve the job with ease. Yes.
    Is it the BEST mouse trap, no.
    I just pull hills in 4th and flats in 5th for the most part


    Sent from my iPhone using Tapatalk

  7. #7
    Setting Up Camp Mjmnklm's Avatar
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    Quote Originally Posted by the.jmo View Post
    My 15 2500 has 3.42
    I pull my 380th with it and it does just fine. Could there be better, of course. My new drw I bought has 4.10
    I would say if you don’t mind the rpm 4.10 all the way for the most grunt.
    A happy medium for towing and highway non towing would be 3.73
    However I will say the only reason I have 3.42 is because there was no other option in 2015.
    Will it achieve the job with ease. Yes.
    Is it the BEST mouse trap, no.
    I just pull hills in 4th and flats in 5th for the most part


    Sent from my iPhone using Tapatalk
    380TH? Momentum?
    2021 GDRV Reflection 320MKS 5ver (hauled by The Beast)
    The Beast - 2019 RAM 3500 Longhorn, CC, LB, DRW, 6.7L Cummins HO, Aisin 6spd, 4wd
    Previous: 2005 Minnie Winnie Class C towing 2014 Mini Cooper Countryman S (both 4 sale)

  8. #8
    Seasoned Camper
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    Quote Originally Posted by Mjmnklm View Post
    380TH? Momentum?
    Correct


    Sent from my iPhone using Tapatalk

  9. #9
    Setting Up Camp
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    Thanks for all the info, guys. We're looking at a 2018 Tradesman crew cab with DRW, 4WD, 3.73 rear axle ratio, Aisin transmission, limited-slip differential, and trailer brake control. Mileage is 104,790. Looks like it should handle our '21 320MKS with ease, and even something larger if we should wish to trade up sometime in the future. Right now, we have been living in our RV in a campground since January, when we sold our house and most of our possessions, and are extremely comfortable. My wife says it feels like an extended vacation with all the comforts of home! She is facing one more surgery, to fuse vertebrae in her lower back, and once she recuperates from that we will hit the road.

    Getting back to my original question, I did some research on 2015--2018 Ram 3500 trucks on ramtrucks.com and it appears that only the crew cab, long bed, 4WD, dually diesels offer a choice of 3.42, 3.73, or 4.10 rear axle ratios. It appears that everything else has the 3.43 rear end. It also appears that DRWs only come on long-bed trucks, if I'm reading the data correctly. I should add that some of the gas-powered trucks do offer a choice of rear-axle ratios, but I'm only interested in diesels.

  10. #10
    Seasoned Camper
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    Gear Ratio for Ram 3500

    You can get a short bed on a drw with the mega cab configuration.

    It sounds like what you need is a mega cab Laramie drw with Aisin and 4.10!


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