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Fifth wheel chucking (practical help needed)

Mrernestp
Explorer
Explorer
I am in search of some practical (layman terms) help for fifth wheel chucking.
I am relatively new to fifth wheeling and towing in general.
I have a 29 ft fifth wheel with a 11,000 lb GVWR (older so heavier).
My truck is a 2023 GMC Sierra 2500HD. Not full size but longer bed (6’ 10”) I believe.
Curt flex air hitch (for short bed so it has a longer neck.)
Reese 20k receiver
I have horrific chucking! Teeth grinding, mind numbing, coffee splattering, child waking level jolting over bridge seems ect.
I’m talking horrific.
I need help.
I understand (tell me if I’m wrong), that my pin/hitch weight needs to be 20% of the total trailers GVWR (loaded weight).
If my pin weight is that target, and I’m still experiencing this horrid chucking, WHAT do I do?
I’m going to upgrade to a newer and larger fifth wheel at some point, but to be honest I am terrified the issue will remain and don’t know how to resolve this or identify it before buying another rig.
Is it because it’s such a short trailer or causes too much hitch weight?
Is it because the shocks are old and spungy?
Is my stuff loaded improperly inside trailer? (Note it chucks with or without a load and there’s not much rearranging contents even possible in a small trailer)
Any practical information for a novice would be greatly appreciated.
15 REPLIES 15

it could be a lot of things..... what part of PA are you from?

I HAD a Lippert Flex Air hitch ( basically the same ) and had chucking from the airbag being low at times.... thats a fast check
Me-Her-the kids
2020 Ford F350 SD 6.7
2020 Redwood 3991RD Garnet