User Tag List

Results 1 to 10 of 10

Thread: Ram Box

  1. #1
    Registered Guest
    Join Date
    Jan 2019
    Posts
    3
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Ram Box

    I have a Ram 2500 with Ram Boxes. I am looking at buying a 337RLS. Does any one know if the pin box on the 337RLS will clear the Ram Boxes in a tight turn? Yes I know how amazing the Reese 5th Airborne Sidewinder is I have on on my Jayco. If I don't have to swap it I may not.

  2. #2
    Site Sponsor
    Join Date
    Apr 2017
    Posts
    146
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I don't think any standard pin box will clear ram boxes. It's been a few years since I was looking into it (didn't end up with ram boxes) but from what I can remember the sidewinder was the only option
    2018 Solitude 377 MBS-R
    2017 GMC Denali 3500 SRW

  3. #3
    Site Sponsor
    Join Date
    Sep 2013
    Location
    PA
    Posts
    1,788
    Mentioned
    15 Post(s)
    Tagged
    0 Thread(s)
    Won't work.
    Inventory Manager at Tom Schaeffer's RV, Shoemakersville, PA www.tomschaeffers.com

    steve@tomschaeffers.com

    2011 RAM 3500 SRW Outdoorsman Edition, 6.7 Cummins--TWEAKED!

    Current 5w-2013 Palomino Columbus 320RS

  4. #4
    Site Sponsor jasonl78's Avatar
    Join Date
    Aug 2017
    Location
    Zimmerman, MN
    Posts
    222
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have a Ram 3500 with Ramboxes. I use the Andersen ultimate hitch rail version. I'm towing a Reflection 28BH that uses the standard Lippert 1621 pinbox. So far this combo has worked great. I dont have thousands of miles of towing experience but so far I haven't had any issues. Here are a few pictures.

    20181013_164705.jpg

    20181013_164719.jpg

    20181013_164325.jpg

    20170922_171435.jpg

    20171019_124105.jpg
    Last edited by jasonl78; 01-10-2019 at 03:39 PM.
    2018 Reflection 28BH
    Andersen Ultimate Hitch ISR Version
    Predator 3500W Inverter Generator
    2017 Ram 3500 Mega cab SRW w/6.4L Hemi, Ramboxes, Active Air Rear Suspension
    2017 Aluma 8214HS
    2015 Lund Crossover 1775 XS

  5. #5
    Site Sponsor jasonl78's Avatar
    Join Date
    Aug 2017
    Location
    Zimmerman, MN
    Posts
    222
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My first picture shows my camper at almost 90 degrees. I've never had to turn that much. I also have my coupler reversed so that puts the front cap 8" closer to the cab. If it were in the normal position, it could turn 90 but I might have clearance issues with the tailgate.

    My bigger concern is putting a 337 on a 2500. Pin weight could be quite high and if payload is something that you're concerned with, it might be an issue.

    Feel free to private message me if you'd like to discuss more.
    2018 Reflection 28BH
    Andersen Ultimate Hitch ISR Version
    Predator 3500W Inverter Generator
    2017 Ram 3500 Mega cab SRW w/6.4L Hemi, Ramboxes, Active Air Rear Suspension
    2017 Aluma 8214HS
    2015 Lund Crossover 1775 XS

  6. #6
    Site Sponsor mageorge's Avatar
    Join Date
    Apr 2014
    Location
    Hot Springs National Park, Arkansas
    Posts
    373
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Had friends that ended up using a sidewinder.


    Sent from my iPhone using Tapatalk
    Mike & Debbie
    Hot Springs, Ar
    2014 Ram 2500 4x4 Short Bed Diesel
    B&W Companion 5th Wheel Hitch
    2014 Reflection 303 (#405)

  7. #7
    Site Sponsor jasonl78's Avatar
    Join Date
    Aug 2017
    Location
    Zimmerman, MN
    Posts
    222
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I found a few more pictures that may be useful in case others are also considering Ramboxes. The pictures I posted earlier show clearance to the sides of the box when the hitch was in the middle position and I was turned nearly 90 degrees on somewhat uneven ground.

    The picture below shows the very first hookup. I had the ball in the lowest position and coupler in the normal position. I was turned about 40-45 degrees on level ground. I wasn't comfortable with that clearance so I raised the ball and reversed the coupler.

    20170922_132953.jpg

    If you're using a regular, non height adjustable hitch and the standard pinbox, I agree with the others it would probably be a problem. If you use an Andersen or the Sidewinder I think you'll be just fine.
    2018 Reflection 28BH
    Andersen Ultimate Hitch ISR Version
    Predator 3500W Inverter Generator
    2017 Ram 3500 Mega cab SRW w/6.4L Hemi, Ramboxes, Active Air Rear Suspension
    2017 Aluma 8214HS
    2015 Lund Crossover 1775 XS

  8. #8
    Registered Guest
    Join Date
    Jan 2019
    Posts
    3
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Excellent information thank you.

    Judging from your first set of pictures if you turned any tighter the trailer would contact the truck cab and the pin box would contact the ram box. Correct?

    Assuming that both the Reflection 28BH and the 337RLS use the Lipper 1621 pin box then your second set of pictures answers my question. It's a clear no it won't work not even close.

    My Ram manual says max 2580 lb pin and 15450 lb towing and the Grand Design web site says the average pin weight is 2090 lbs so I am good with the 337.

  9. #9
    Site Sponsor jasonl78's Avatar
    Join Date
    Aug 2017
    Location
    Zimmerman, MN
    Posts
    222
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have the ball in the middle height position in the 2nd picture. On somewhat level ground and turned near 90, the pinbox does not contact the Rambox or my tonneau cover rails. I'm sure there is some scenario where contact could happen. I still have the ability to raise the ball another inch and adjust my pinbox if more clearance is required. In my personal travels I have yet to find a situation where I've needed to turn that sharp. What hitch do you have? Is there height adjustment?

    Regarding pin weight, the GD website uses empty weight. Your camper will be much heavier. If I recall, those who do have 337s have reported real world weights of 2800-2900. Unless you carry very little cargo you'll surely be over payload. That's a decision you'll need to make for yourself though. Some people follow that payload sticker religiously and others completely ignore it. I'm not trying to make you feel bad about it but want to point out things that you or others in the future may not be aware of.

    Here's a picture showing what your tires look like at a near 90 degree turn. Not very comforting!
    20181013_164731.jpg
    2018 Reflection 28BH
    Andersen Ultimate Hitch ISR Version
    Predator 3500W Inverter Generator
    2017 Ram 3500 Mega cab SRW w/6.4L Hemi, Ramboxes, Active Air Rear Suspension
    2017 Aluma 8214HS
    2015 Lund Crossover 1775 XS

  10. #10
    Registered Guest
    Join Date
    Jan 2019
    Posts
    3
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Looking at your profile picture of the truck + trailer it looks like the trailer is level and raising the ball and or lowering the pin box on the trailer will move you away from level so your set up is probably optimum in my view.

    Regarding the loading: On my Jayco the C of G for the fresh water tank is about 4 feet behind the aft axle and the kitchen grey water is aft of the fresh water. I can't remember the weight and balance calculation but a full water tank reduces the pin weight a lot. Conversely if I drive with my usual stuff in the basement + full bathroom grey water and the black water tank full and the fresh water and kitchen grey water tanks empty I am way way over the max Ram pin weight.
    When I bought my 2012 Ram there were guys on the Ram users forum who were replacing one or more of the leaf springs on the 2500 with the leaf springs for a 3500 and saying that was the only difference between a 2012 Ram 2500 and a 2012 Ram 3500. No idea if its true or not. I am not worried about being a over on short trips to the bush and on highway trips at 65 mph I keep the weight and balance reasonable. I don't know where the tanks are on the 337.

    I hear you on the undercarriage stress in tight turns. I hate the sound of the undercarriage screaming in protest in a tight turn. Tight turns on pavement can't be good.

    Appreciate your input.
    Cheers

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

DISCLAIMER:This website is not affiliated with or endorsed by Grand Design RV, LLC or any of its affiliates. This is an independent, unofficial site.