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  • Pin Box Too Low

    I have a 2021 Grand Design 397TH with a 2017 Ford F450 and a Reese 5th wheel hitch with the puck system.
    When hooked up to this camper the pin box slants down below the truck bed rails and hits the truck tonneau cover rails on tight turns.
    The dealer is not sure how to fix. LCI only says the pin box is installed correctly.
    I have raised the hitch to the highest mounting holes but that is not enough.
    I think I need a new pin box like the Reese 5th Airborne. The dealership is trying to find someone to pay for it.
    Any ideas? Click image for larger version

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  • #2
    None of my customers have ever returned with this situation. I'm anxious to hear the remedy.
    Scott M. Barlag, RV Product Specialist, NW Indiana

    Comment


    • #3
      Hi Soundman. From photo number 3, it looks like the contact area is pretty small. But I can't see enough to know how to solve it. I'm wondering if it would be possible to remove a small amount of metal from the contact area on the rails would alleviate the situation?

      Is the fifth wheel riding level, or is it down in the back? If the suspension was raised, would it level out the hitch and allow for better clearance?

      Jim
      Jim and Ginnie
      2024 Solitude 310GK
      GDRV Technical Forum Moderator
      GDRV Rally Support Coordinator

      Comment


      • #4
        Originally posted by SoundMan View Post
        I have a 2021 Grand Design 397TH with a 2017 Ford F450 and a Reese 5th wheel hitch with the puck system.
        When hooked up to this camper the pin box slants down below the truck bed rails and hits the truck tonneau cover rails on tight turns.
        The dealer is not sure how to fix. LCI only says the pin box is installed correctly.
        I have raised the hitch to the highest mounting holes but that is not enough.
        I think I need a new pin box like the Reese 5th Airborne. The dealership is trying to find someone to pay for it.
        Any ideas? Click image for larger version

Name:	IMG_3029 - Copy.jpg
Views:	769
Size:	83.7 KB
ID:	35396Click image for larger version

Name:	IMG_3067 - Copy.jpg
Views:	575
Size:	117.1 KB
ID:	35397Click image for larger version

Name:	IMG_3039 - Copy.jpg
Views:	518
Size:	64.9 KB
ID:	35398
        Depending on the model of the Reese hitch you have there may be taller legs available. I would give them a call just to double check. https://www.reeseprod.com/
        2018 Reflection 150 Series 220RK 5th whee, Star White 2022 F350 King Ranch CC Long bed (HAL) (CCC 4062lbs), B&W 25K OEM Companion,. SteadyFast system, Trailer reverse lights, rear receiver spare tire holder, storage tube, sumo springs, Victron MultiPlus 12/120/3000, Solar, Custom 6K axles upgrade, and other modifications.

        Comment


        • #5
          SoundMan

          If raising the front of the Momentum puts it out of level, can you lower the back of the truck?

          Per previous discussions on this forum (that I can't find at the moment) I believe some owners changed rear springs? or spring attachments? to lower the back end of their F350s to gain clearance the the 5th wheel overhang. I have no idea whether this is feasible with an F450.

          Rob
          Cate & Rob
          (with Border Collies Molly & Angel + Kitties Hazel & Elsie)
          2015 Reflection 303RLS
          2022 F350 Diesel CC SB SRW Lariat
          Bayham, Ontario, Canada

          Comment


          • #6
            Originally posted by Cate&Rob View Post
            SoundMan

            If raising the front of the Momentum puts it out of level, can you lower the back of the truck?

            Per previous discussions on this forum (that I can't find at the moment) I believe some owners changed rear springs? or spring attachments? to lower the back end of their F350s to gain clearance the the 5th wheel overhang. I have no idea whether this is feasible with an F450.

            Rob
            Yeah I replaced my rear blocks with F250 blocks to lower my rear end and gain clearance. There was a post on the Ford-Trucks forum on how to do it. The newer (2020 maybe) trucks come this way from the factory but the 2017-2019 trucks had lifted rear ends that caused issues with some fifth wheels. It was a fairly inexpensive and painless mod, easy to do with a floor jack and some big wrenches.

            Another option might be a different cover. I had a tonneau on one truck that had this issue, and I switched to a soft trifold with no rails that eliminated the problem. I now have a BakFlip and have had no issues. It was the worst with my roll up tonneau where the rails angled up a bit.
            Forum moderators are not GD employees--we are volunteers and owners presumably just like yourself. Unless specifically mentioned otherwise, we have nothing to gain should you choose to purchase a product or engage a service we discuss on this forum.

            Neil Citro
            2018 Reflection 28BH Pepwave
            2019 F350 6.7L Long Bed Crew Cab

            Comment

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