Full water tank may make it worse if the tank is located in the rear of the fifth wheel - could take weight off the pin (water is about 8#/gal). Low pin weight can cause the issue.
Air bags can make an improvement - will not eliminate all chucking. I run about 45 psig in the air bags.
Good to check how level the fifth wheel when towing - "nose high".
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RV - 2017 Avalanche 320RS
TV - 2011 Chevy Silverado 3500HD LTZ CCLB Duramax SRW 4X4
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