GRAND DESIGN Complaints

I am having the frame flex issues as well as others. I’m not getting anywhere with grand design. The doors come open when traveling if not strapped from the inside. Pin box on the hitch moves excessively, interior panels are moving in the front, middle and rear of the trailer.

Our 5th wheel had broken welds on the drivers side of frame in early 2023 that were repaired at the factory. There is now a service bulletin for a lag bolt inspection, we brought it to a dealership for inspection and it was determined many lag bolts are either missing or broken which means our side walls have been probably attached to the frame. It was also discovered the the frame is flexing outside of the acceptable parameters and there are cracked welds now in the passenger side. We were told it is unsafe to move the 5th wheel at this time. We are awaiting feedback from manufacturer.

Excessive frame flex in pin box area of fifth wheel. Forward left cargo door unlatching while towing. Vehicle is currently at Lazydays dealer in TN for inspection and TSB for excessive frame flex. Inspection has revealed major structural cracks and structural failure in upper deck steel frame structure. Vehicle has been deemed unsafe to transport and must be repaired in place or partially repaired for transport to factory. We noticed excessive deformation of the pin box and substantial rubbing of internal cabinets, etc upon return from a recent trip. Based of the damage, it would have been possible for the RV structure to separate from our tow vehicle putting us and others on the road at significant risk of injury or death. We saw indications of interior movement of cabinets and rubbing on walls for several thousand miles, but no indication of significant pinbox deflection until recently. Manufacturer has provided no guidelines or communication to owners to be aware of potential problems or to indicate things to look for that may indicate the vehicle poses a serious risk/hazard. Initial signs of rubbing inside the vehicle, and a loose latch and flapping of cargo door were observed in January 2024. We have video of substantial gap opening and movement of interior cabinets when taking vehicle off of stabilizer jacks and loading onto fifth wheel hitch of truck. Unable to get additional pictures currently as the RV is at the dealer for repairs. Will attempt to get photos of internal frame damage early next week if possible.

Side compartments opening while towing unit on highway…items in compartment flying out …hatches won’t closed properly to much gap…big gap also on top cap where it connects to wall in front..unit taken to lazdays Tampa for frame flex recall…inspection revealed major cracks in frame everywhere as a result causing major frame flex…lots of welding is being done…by grand design mechanic ..slide system also damaged as a result of frame flex …unit is currently still at lazdays Tampa being welded together…they keep finding more and more damage …. You guys should send an inspector to inspect it to see major frame damage from poor frame build I believe unit is unsafe to be roadworthy with the amount of welding and repairs to frame the keep doing

I beam frame, frame failure, compartment doors popping open, walls moving, lag screws incorrect. RV is available for inspection. compartment door popping open and tings falling out, walls coming loose and RV breaking apart king pin breaking at front of RV and coming loose from two vehicle. It has been reported to dealer service center The problem has been inspected by the MFG Dealer the problem started cracking of floors, loose lag screws, bent I beam, walls moving.

I noticed a grinding noise coming from the left front wheel of my Grand Design Momentum. Concerned, I brought it to the dealership the following week for inspection. Upon examination, they discovered that the bolts securing the brake calipers were entirely missing from the system, with no traces of the bolts found in the wheel assembly. As a result, the calipers had come loose and were grinding against both the wheel hub and the rim. This issue presented a significant safety hazard. According to the dealership, the situation could have escalated to the point where the wheel itself might have detached from the vehicle during transit.

Roof Membrane separating from nose cap, nose cap separating from roof membrane. 5th wheel pin box sinking up into rv upper deck when lowering onto the truck. Cargo and main doors open during transport. Sawdust on dresser in nose of the RV. Lag Screws unscrewing and/or loose in the upper deck. Stress fractures in fiberglass on the cap of RV. Pinch molding coming loose from underside of 5th Wheel skin. Screws backing out and/or breaking underneath the upper deck nose cap. Insulation underneath the front of the RV is falling off. Back Patio bubbling. Rear axle leaf springs bolt and bushings coming out during transport. Screws on top of the upper deck by rain gutters keep coming loose.

There are several things starting off with frame flexing issue causing numerous of parts to fail and move out of place. The manufacturer did a repair of this and my confidence in it being repaired correctly is very low. I do not feel safe towing this RV anywhere. Second, the broken leaf spring on the front axle. This could have caused the vehicle to lose control and cause a serious accident. It has been repaired. We have had the entry doors come open on us during towing. Nothing was lost from this. Lastly, the master bedroom slide has come out about 3 inches during travel. They repaired the inside bottom brace at the service center.

Trailer is not manufactured in compliance of FCR Title 49 393.70 a,b,(ii), California Code of Regulations Title 13 and Cal.Vehicle Code. Coupling devices and towing methods, as it is a known fact that 5th wheel hitches are breaking frames. Hitch will flex vertically 1 to 3 inches when towing. If towing truck has USDOT and/or California BIT numbers on side of truck the trailer is bound to Federal and State Motor Carrier Laws as trailer is part of combination. Hitch weight is overweight by 106 lbs empty, see attached weight sheets and product sheet. Grand Design main sales phone number confirmed Max Hitch Weight is correct on sales brochure. We cannot legally install generator or washer dryer in front compartments as trailer will be at least 500lbs overweight on hitch. During trips, front cargo door and rear cargo doors have come unlatched. When trailer was purchased, brakes were not operating properly, called dealer, the brakes are self adjusting and will get better. I knew better and fixed myself, Dexter reimbursed me for parts. Trailer will go to Grand Design Dealer for repairs to hitch and upper deck failure in February 2025.

We are showing many signs of excessive frame flex/failure in our 2023 Grand Design Momentum 397THS. Our baggage/storage doors do not properly fit nor lock. The RV was in the shop from Jan-May 2023 to address this. Had the doors replaced and resealed. They still are not flush with the RV, still barely latch, and have popped open while driving. While in the shop, they addressed but "could not duplicate" the underbelly continuously filling with water when it rains. Excessive amounts of water that saturate all of the insulation-- causing us to drive with extra weight until we can stop and replace it all. Not sure where the water even comes from. Our filon around the hitch is seperating. Our pinch molding on both sides completely falls out. The screws holding front cap to roof popped out, sealant broken. There is wall separation in the lower deck. This causes excess rubbing of the walls, popping trim pieces off, and dust left after any movement of the RV. There is loud creaking and popping as we lift our RV off of our truck. The lag bolts are unscrewing themselves from the frame in the upper deck. Slide in the upper deck is digging into the flooring, leaving indentations, while in transit. Floor creaking in upper deck. Our electrical wiring for our running lights/turn signals/brake lights, as well as our leveling system wires were zip tied to the spindle of our slide. This caused the wires to wrap around over and over and slice themselves apart. In turn causing ALL of those systems to fail-- no running lights, no turn signals, no brake lights, and our jacks would not go down.