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AndyW's avatar
AndyW
Explorer
Sep 19, 2014

Did you reinforce your frame extensions before towing?

I'm about to pull the trigger on a 2004 Forest River Sunseeker 2900, built on a Ford E450 chassis. My first RV of any type. This unit currently has a class 3 receiver hitch, presumably factory installed, with 500/5000 weight ratings stamped on it. I am planning to tow a small 2 horse trailer that weighs about 4850 lbs fully loaded.

I have had a number of people tell me that I need to have a body shop reinforce the rear frame extensions before towing our horse trailer. I've gotten a number of reasons for this:

- "RV manufacturers do a terrible job on this, never trust it"
- "horses are different, they are LIVE weight, and put more strain on a vehicle".
- "RV trailer towing ratings assume you are towing a car, which doesn't have significant tongue weight"
- "you should use a weight distributing hitch, and the hitch and frame extensions aren't set up for that from the factory"

My question is - do people regularly do this, and approximately how much should I expect it to cost?

For what it's worth, I currently tow this trailer with an F150, no weight distributing hitch, and have had zero issues or concerns.
  • Dakzuki wrote:
    The only question is whether Forest River rates the RV at 500/5000. Some RVs have 500/5000 hitches but the RV is not rated to tow that (due to frame extensions, etc). Don't just go with what's on the hitch assembly.

    I'd try and get access to an owner's manual or contact FR.

    Be aware of your combined weight rating too.


    I contacted one service center who said that 2007+ are definitely rated for 500/5000, and he suspected 2004 would be as well, but couldn't say for sure.

    I have not been able to reach anyone at Forest River able to answer this question, so was hoping someone had first-hand experience.
  • Forest River rates capacity of hitch receivers in consultation with frame manufacturer. Yours is rated 5000 lbs. so you will be fine. Recently they just went to 7500 on the Ford chassis--first class C in industry approved by frame manufacturer.

    Just don't exceed the total cargo carrying capacity of your MH. Should be on a sticker on the drivers door jamb. A trip to a scale would be a good thing.
  • The only question is whether Forest River rates the RV at 500/5000. Some RVs have 500/5000 hitches but the RV is not rated to tow that (due to frame extensions, etc). Don't just go with what's on the hitch assembly.

    I'd try and get access to an owner's manual or contact FR.

    Be aware of your combined weight rating too.