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Old 12-27-2016, 11:30 PM   #1
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Replacing Class III with Class IV hitch

Was wondering if its really easy to replace my Class III with a Class IV as simple as unbolting and re-bolting a replacement??

Currently its this part 130339-08-000 on my 2002 Istasca Sunova. I'm not towing, but need the extra 100lbs tongue weight as I want to install a motorcycle/scooter carrier. My Yamaha Majesty is dry weight at 432lbs and the carrier is about 70lbs, so that would pretty much max out my Class III with gas and helmets and such.


Thanks in advance,

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Old 12-28-2016, 07:18 AM   #2
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Replacing Class III with Class IV hitch

I think you will find that your current hitch is bolted to a fabricated extension that is likely welded to the chassis frame rails. The extension is likely the weakest link and I suggest you have a competent hitch installer take a look at reinforcing the extension before you add ANY significant tongue weight.

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Old 12-28-2016, 07:26 AM   #3
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The hitch on my 06 Itasca is both bolted and welded. Take a closer look before you buy the new hitch. The old one may not come off.
Fran, Mary & Zoey (silver Cocker)
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Old 12-28-2016, 08:22 AM   #4
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Having a good welder reinforce the existing setup might be the better way to go. You don't need a lot, more for peace of mind than a need for a lot of additional strength.
Vince and Susan
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Old 12-28-2016, 02:01 PM   #5
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Before proceeding you need to consider the impact of loading 500 pounds on the back of your motorhome. On mine (based on my overhang and wheel base), it would result in shifting 400 pounds from the front axle to the rear for a total of 900 pounds of additional load on the rear axle. This could impact handling and ride as well as possibly overloading the rear axle or tires. You may want to look at something like a swivel wheel trailer to remove a majority of the load from the hitch.
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Old 12-28-2016, 08:18 PM   #6
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Keep in mind that simply adding a larger hitch will not increase your carrying capacity. You have that Class 3 hitch on there for a reason.
As stated above. The frame was probably extended therefore reducing the chassis/hitch capacity.
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Old 12-28-2016, 10:23 PM   #7
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Thanks for the sound advise everyone. I wanted to go the scooter route as I didn't want to tow but will definitely look into the carrier with the wheel in back. Guess the extra expense of the carrier will be worth it.

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