The frame flex issue has been out there for well over a decade. It’s across ALL brands that use Lippert frame. The frame is built per customer specs.. customer being the RV builder.
The manner in which the super structure is attached to the frame is also suspect and in my opinion not enough gussets and proper welds for the load imposed on the frame.
There’s some good info about Lipperts frame, welds, repairs, etc out there ... sadly even 2019 and 2020 fifth wheels are still seeing cracks in sidewalls ...usually lower left corner of bedroom slide out
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2007 GMC Classic club cab 4x4 Duramax LBZ
2014 Alpine 3010 RE. 34 foot fifth wheel
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