2016 Grand Design MOMENTUM problems and owner complaints

front frame failure, yes, trailer is sagging in the front, inspected by insurance co., no warning

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The frame has failed on our rv it is flexing when being pulled and we are afraid it may fail completely and break free from the pull vehicle. They are calling this frame flex and seems to be common please don't wait until a complete failure happens and people get hurt to address this issue.

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Based on internet craze of and symptoms of Frame Flex | Frame Failure on Grand Design Momentum 5th wheels I had my unit measured for Fram Flex by Grand Design at the GD East Coast Rally. According to their measurements at that time I was 1/16 inch away from needing to be concerned regarding frame flex. After the fact in reading Lippert Components Incorporated (LCI) measuring instructions Grand Design did NOT measure my unit per LCI's instructions. After much thought and continued symptoms of frame flex we decided to incur personal expenses an…

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Structural Frame Failure. We found frame damage at a rest stop while traveling down the interstate. We observed side wall separations and multiple cracks in the welds around the pin box. The 5th wheel trailer was taken to a commercial truck frame repair shop in Florida and after opening up the panel underneath the pin box we discovered multiple breaks/cracks in the structural frame. We filed and insurance claim and an adjuster came out and photo documented all the frame damages along with documenting the overall build construction of the …

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WE WERE IN ROUTE TO ASSATEAGUE FOR THE WEEKEND WHEN OUR AWNING SOMEHOW OPENED & DETACHED FROM OUR CAMPER WHILE DRIVING AT HIGHWAY SPEED ON RT 50 IN MARYLAND. I BELIEVE IT FAILED DUE TO BEING BLOWN OPEN BY THE WIND, BUT I AM UNSURE. WHEN IT DETACHED, IT VIOLENTLY FLAILED AROUND DAMAGING THE EXTERIOR OF THE TRAILER. WE WERE ON THE CHESAPEAKE BAY BRIDGE WHEN THE EVENT OCCURRED WITH THE AWNING FLAILING AROUND BY CARS & THE BRIDGE STRUCTURE. AS SOON AS I HEARD THE SOUND, I IMMEDIATELY DROPPED OUR SPEED TO A CRAWL & STARTED LOOKING AROUND AND SAW…

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We used the gas water heater on our Rig. Come to find out, it blew the cover off the water heater, burned the wires and melted the case. We are very lucky our rig did not catch fire.

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We had a towing incident chain's came detached from camper one side was only tack welded when contacted grand design got no where with them

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Frame started to flex excessively in the king-pin area and on the inside, above the king-pin area. Issue was confirmed by independent RV dealer. The movement exceeded Lipperts stated limits for the frame to flex. After consulting with Grand Design and Lippert, instructed to take RV to local Grand Design dealer for further inspection and repair. Dealer found broken welds on the frame, broken bolts attaching side wall to frame, and missing bolts intended to attach wall to frame. After authorization by Grand Design and Lippert, Lippert send r…

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We have a brand new 2023 Grand Design Momentum 5th wheel. Had her for 9 months. Taken only 2 trips thus far. I have a structural stress fractures on the corner of my closet slide (approx 4”), caulking around the front cap has been pulled away, both sides of our bedroom upper cabinets have about 3” cracks on the bottom along the wall from frame flex / failure. It’s difficult to close our main door. Often times it requires us to slam once or twice to get the door to close. All this is due to frame flex. I have spoken to Grand Design and they a…

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Our new 2024 Momentum 414M suffered a landing gear failure - while returning to hitch height the passenger side landing gear cylinder housing broke, causing the camper to fall to it's belly. Upon further research, Grand Design has had issues with frames flexing. Also - the hydraulic cylinder mfg has a gen 2 model that has reinforcement where ours failed. Either way the frame is currently twisted. It's unknown if the cylinder housing simply failed and it caused the drop, which caused frame twist, OR if the frame was flexing, put additional s…

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front frame failure, yes, trailer is sagging in the front, inspected by insurance co., no warning

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The frame has failed on our rv it is flexing when being pulled and we are afraid it may fail completely and break free from the pull vehicle. They are calling this frame flex and seems to be common please don't wait until a complete failure happens and people get hurt to address this issue.

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This is a 43 foot fifth wheel RV. The frame near the front of the RV is showing signs of "frame-flex," or frame cracking. The attached pictures illustrate where the walls are shifting and creating wear marks; this is consistent with other RV owners experiences the same problem. This issue could contribute in further frame cracking that may result in significant property damage or even death. I plan to report this issue today to the manufacturer, Grand Design.

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We have frame failure on our trailer, we have not taken it apart yet to give all the details on the welds broken but metal is starting to come out from the fiberglass, and our cabinets inside came part. We contacted Grand Design and they stated as second owners there is no warranty, we contacted Lippert they said to reach out to GD and our insurance said they do not repair manufacturing issues. We will be taking to a shop at the end of February and will have a better understanding of all the issues.

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WE WERE IN ROUTE TO ASSATEAGUE FOR THE WEEKEND WHEN OUR AWNING SOMEHOW OPENED & DETACHED FROM OUR CAMPER WHILE DRIVING AT HIGHWAY SPEED ON RT 50 IN MARYLAND. I BELIEVE IT FAILED DUE TO BEING BLOWN OPEN BY THE WIND, BUT I AM UNSURE. WHEN IT DETACHED, IT VIOLENTLY FLAILED AROUND DAMAGING THE EXTERIOR OF THE TRAILER. WE WERE ON THE CHESAPEAKE BAY BRIDGE WHEN THE EVENT OCCURRED WITH THE AWNING FLAILING AROUND BY CARS & THE BRIDGE STRUCTURE. AS SOON AS I HEARD THE SOUND, I IMMEDIATELY DROPPED OUR SPEED TO A CRAWL & STARTED LOOKING AROUND AND SAW…

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The contact owns a 2020 Grand Design Recreational Momentum. The contact stated that the floor was started buckling and there were bubbles on the flooring of the trailer. The contact stated that one of the bubble was near the front bedroom towards the bathroom, and the other bubble was towards the hallway. The contact took the vehicle to the local dealer however, the mechanic was unable to identify the cause of the failure however, the mechanic was willing to fix the esthetics by sanding the floors and replacing the linoleum. The trailer was rep…

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It is a common issue with the Grand Design Momentum G-class travel trailers where the interior floor and possibly the frame are flexing so much that is causes the laminate flooring to lift and separate from the plywood underneath. Bubbles in my laminate flooring were found during our initial walk through when our trailer was purchased, I was lead to believe that it was just a simple adhesive issue, but have since found from research that this is a common issue with all the g-class trailers. Many people on the Grand Design facebook pages have ex…

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Frame started to flex excessively in the king-pin area and on the inside, above the king-pin area. Issue was confirmed by independent RV dealer. The movement exceeded Lipperts stated limits for the frame to flex. After consulting with Grand Design and Lippert, instructed to take RV to local Grand Design dealer for further inspection and repair. Dealer found broken welds on the frame, broken bolts attaching side wall to frame, and missing bolts intended to attach wall to frame. After authorization by Grand Design and Lippert, Lippert send r…

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We have a brand new 2023 Grand Design Momentum 5th wheel. Had her for 9 months. Taken only 2 trips thus far. I have a structural stress fractures on the corner of my closet slide (approx 4”), caulking around the front cap has been pulled away, both sides of our bedroom upper cabinets have about 3” cracks on the bottom along the wall from frame flex / failure. It’s difficult to close our main door. Often times it requires us to slam once or twice to get the door to close. All this is due to frame flex. I have spoken to Grand Design and they a…

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Frame tore/broke at welds where upper deck(living room) attaches to frame. Fiberglass on exterior tore as a result.

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The contact owns a 2017 Grand Design Momentum RV. The contact stated that the exterior storage doors failed to close properly. The contact stated that the generator doors almost detached, and the front rubber trim hold was detaching. The RV was towed to the dealer, where several repairs were performed; however, the frame continued to fracture. The dealer advised the contact to park the RV. The RV was not repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was unknown.

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Structural Frame Failure. We found frame damage at a rest stop while traveling down the interstate. We observed side wall separations and multiple cracks in the welds around the pin box. The 5th wheel trailer was taken to a commercial truck frame repair shop in Florida and after opening up the panel underneath the pin box we discovered multiple breaks/cracks in the structural frame. We filed and insurance claim and an adjuster came out and photo documented all the frame damages along with documenting the overall build construction of the …

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Broken frame where the pin box is the hitch part that connects to the truck very very unsafe

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Excess frame flex. Contacted Grand Design, they scheduled an inspection and then preformed followup repairs. New bracing and support were added by Grand Design.

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Frame Failure: Welds broke, and walls separated. The dealer and manufacturer acknowledged the issue and repaired the issue.

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The contact owns a 2022 Grand Design Momentum. The contact stated that the RV was purchased brand new and taken to the residence, where the contact noticed that the front driver's side nose had detached at the fifth wheel pin location. The RV was taken to the dealer, where it was repaired; however, the failure recurred while the RV was still at the dealer. The RV was repaired. Additionally, the contact stated that the sliding doors were not opening and closing properly due to the frame flexing. The contact stated that the suspension was fractur…

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I was made aware of Grand Design’s Technical Service Bulletin 24-001 concerning issues with undersized and/or missing lag screws possibly be on some models of their fifth wheel campers. I was able to determine that our Momentum 381MS had the undersized 3/8” lag screws used in the construction of our camper. I made an appointment with Campers Inn in Jeffersonville, IN and took it in. I was notified by them on 8-5-24 that there were also 4 missing lag screws. They also told me there were broken welds on the frame. I went there on 8-6-24 and took …

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Our new 2024 Momentum 414M suffered a landing gear failure - while returning to hitch height the passenger side landing gear cylinder housing broke, causing the camper to fall to it's belly. Upon further research, Grand Design has had issues with frames flexing. Also - the hydraulic cylinder mfg has a gen 2 model that has reinforcement where ours failed. Either way the frame is currently twisted. It's unknown if the cylinder housing simply failed and it caused the drop, which caused frame twist, OR if the frame was flexing, put additional s…

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front frame failure, yes, trailer is sagging in the front, inspected by insurance co., no warning

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The front left slide stopped working 3 weeks ago. Something appeared to be wrong with the wall but I was not sure. Yesterday I noticed the front left portion of the frame was flexing a significant amount. I started inspecting the frame and I am seeing broken welds

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LEAF SPRINGS BROKEN, CUTTING WIRE TO ELECTRIC TRAILER BRAKES. TWO LEAF SPRING FAILURES, ONE AT 11 MONTHS SINCE PURCHASE, SECOND FAILURE AT 13 MONTHS. BOTH FAILURES WHILE MOVING.

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Fifth wheel pin box busted loose weld failed trailer about came off the truck this trailer weighs 16,000 plus pounds it was very unsafe the manufacturer knows of this issue The RV started to rip itself apart leave spring shackles busted

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my suspension failed with the leaf springs breaking and the shackles and bushings failed then the frame is breaking( flexing). all fasteners were loose and some missing the body came loose from the frame... this is a issue with many other grand design 5th wheels ... hopefully the parts that fell off on the freeway did not hurt anyone... ( leaf springs)

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BROKEN WELDS IN THE FRAME IN 5 DIFFERENT PLACES. The dealership in Grand Junction Colorado has told us the rig is to unsafe to tow it off their lot. The dealership in Grand Junction Colorado are the ones that diagnosed the broken welds in the frame. The RV has not been inspected by the manufacturer. Manufacturer has only asked more questions and asked for additional photos. We walked into the RV and noticed that the cabinets had moved and the trim was hanging down. We first noticed this on June 5th. Called the dealership on June 7th to make a…

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Left rear wet bolt sheared mid-bolt at the hole where the grease comes out to grease the sleeve in the spring eye. Spring was sliding side to side, causing the shackle hanger to bend and the spring to detach from the shackle. I have Summo springs on the trailer, and the one on the left rear took the weight of the trailer, and may have prevented further issue's. This occurred on the freeway at approximately 65 mph. Safety concern would be uncontrolled axle due to the spring holding the axle not being attached to the frame, and possible uncontr…

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Frame started to flex excessively in the king-pin area and on the inside, above the king-pin area. Issue was confirmed by independent RV dealer. The movement exceeded Lipperts stated limits for the frame to flex. After consulting with Grand Design and Lippert, instructed to take RV to local Grand Design dealer for further inspection and repair. Dealer found broken welds on the frame, broken bolts attaching side wall to frame, and missing bolts intended to attach wall to frame. After authorization by Grand Design and Lippert, Lippert send r…

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The dealership has declared frame failure and failure of the pin box flexing up to 3-4 inches just picking it up with a forklift. Lag bolts are missing and/or backed out. Dealer has deemed it not safe for use. They will not move it out of their bay. Fist signs were wall separation throughout the RV. Doors not closing because door opening was out of square. Floor squeaking in multiple location. Center Island moves and squeaking. Abnormal wear on middle axle tires. Unusual pop from passenger level leg that shakes the rig. Excessive creaking under…

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Axles were supposedly installed backwards. Suspension is not installed square under the frame and rv bounces violently behind truck. Storage doors have come open while in transit.

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In early November 2025, while towing our 2024 Grand Design Momentum 344M M-Class fifth wheel toy hauler to a family Thanksgiving gathering, the rearmost driver-side leaf spring fractured and failed during travel. The trailer was towed by a 2024 Ram 3500 dually, properly rated for this unit, operated within all load ratings, and driven at normal cautious speeds at the time of failure. The failure rendered the trailer immobile and unsafe to move. It has remained in storage since the incident because the damaged suspension cannot support safe relo…

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I started noticing rub marks on the interior walls next to the night stands after the last few uses, and they appear to be getting worse after each use. I was made aware of the deck/frame flex issues the some GD fifth wheels are having and was referred to TSB 24-001. My RV is experiencing the exact concern described in the TSB. I opened a case number with GD, and took the RV to an authorized repair center. The repair center took measurements and confirmed my deck flex concern with GD and recommended a complete replacement/repair of the struct…

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The contact owns a 2019 Grand Design RV. The contact stated while driving at an undisclosed speed, the RV the front and rear doors inadvertently opened. The RV was taken to the dealer but was not diagnosed; however, the dealer informed the contact that the doors had been repaired. The contact stated while driving at an undisclosed speed, the rear tires blew out. There was no warning light illuminated. The contact pulled over the RV and noticed that the rear axle had fractured. The dealer was contacted. The RV was not diagnosed or repaired. The …

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On walk through rear awning flew off in slight breeze, took 4 years to get repaired with covid and parts availability, could have just as easily came off on the road, had two 3/4'' screws holding it on and into skin, not frame. Upon looking at bedroom night tables gap at front cap found rub marks on wallcovering and sawdust from rubbing/flexing cabinets from perceived frame flex. back garage man door would open by itself while traveling if deadbolt not used , front man door sticks and screen door has to be opened separately with considerable fo…

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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 …

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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.

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On this RV the back man door will not close/latch. We have to use a bungy cord to keep it closed. The latch on the door doesn't catch on the wall catch plate.

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AFTER READING ON THE GRAND DESIGN OWNERS FORUM ABOUT LEAKING GREASE SEALS ON THE WHEELS, I DECIDED TO DO AN INSPECTION OF MY BRAKES. I HAVE PUT ONLY 500 MILES ON MY TRAILER SINCE TAKING DELIVERY ON JUNE 8, 2016. I ASSUME THAT THE TRAILER WAS DELIVERED TO OREGON BY TOWING IT FROM THE FACTORY. I REMOVED THE RIGHT FRONT BRAKE DRUM AND SURE ENOUGH FOUND A FAILED GREASE SEAL AND GLOBS OF WHEEL BEARING GREASE ON THE DRUM, BRAKE SHOES AND MAGNET.

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A KNOWN PROBLEM ON MANY GRAND DESIGN UNITS, TOLD BY BOTH THE MANUFACTURER AND THE DEALER THAT PROBLEM HAS BEEN FIXED, AND THAT UPON DELIVERY, THE BRAKES ON MY NEW UNIT, DELIVERED ON 09/23/16, WERE CHECKED OUT, AND GREASE FREE. UPON ARRIVING AT MY HOME, ONE WEEK LATER, BRAKES ARE COVERED WITH GREASE AND MY RV SERVICE REPAIR CENTER SAID THE UNIT NEVER SHOULD HAVE BEEN DRIVEN AS IT IS UNSAFE. I AWAIT GRAND DESIGN'S RESPONSE, PHOTOS HAVE BEEN TAKEN, BUT AFTER REVIEWING ALL THE GREASED BRAKE COMPLAINTS ON THE GRAND DESIGN OWNERS FORUM, I DECIDED…

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Issues with: - original drum breaks failed due to incorrect wiring, requiring 100% assembly replacement. - front wall separation - trim and cabinets moving and separating from walls - missing and broken lag bolts - front weather stripping separated from front cap - excessive sawdust under cabinets after any travel - wallpaper wear showing excessive movement of front bed overhead cabinets during travel - floor joists separating from upper floor - slides opening during travel - leaf spring hangers bending and twisting, and breaking off - spare …

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Bolts holding brake caliper assembly to the axle apparently loosen and fell out while on the highway. This caused the caliper to drop, resting on inner part of the tire rim, leaving approximately half to one quarter of the caliper on the disc. Caliper caused significant gouging on the rim. During braking, the caliper was prevented from spinning during brake application due to it hitting the axle u-bolt retention plate on top of the leaf spring. In the very limited backing, the hydraulic line held back the caliper. Safety issues are the comple…

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Multiple systems failed on this unit. Trailer Brake failure, The rear trailer brake wires were discovered to be severed inside the wheel drum from the factory. For the first year of use they were inoperable. This was suspected and confirmed with a thermal camera. The tow vehicle also alarmed “Check trailer brakes” while driving. A dealer inspected them and found the wires severed. This was repaired. Suspension failure, the rear driver side leaf spring broke on a paved highway 9 months after purchase. Pulled over immediately to inspect the is…

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The contact owns a 2023 Grand Design Momentum hauled by a 2022 Ford F-450. The contact stated that while driving uphill at 65 MPH and depressing the brake pedal, the trailer brakes failed to respond as needed. The contact pulled over onto the side of the highway and was able to bring the trailer to a complete stop. No warning lights were illuminated. The trailer was taken to a local dealer and was inspected. The contact was advised that the trailer no longer had brake pads. The trailer was not repaired. The manufacturer was notified of the fail…

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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 escalate…

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Sudden loss of trailer brakes nearly caused me to rear end vehicle in front of me. The more concerning part is when I went to an RV dealer to disgnose, they pulled the break away emergency brake to test if brakes applied. They did not apply, however about 1 minute after the breakway was pulled the switch began to melt, then almost immediately there was smoke coming from inside the battery compartment and a fire was started by the power wires melting due to a short. The fire then damaged a hydralic line and hydralic fluid was leaking rig…

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THE WIRING FOR THE ELECTRIC TRAILER BRAKES ARE NOT IN ANY PROTECTIVE COVER AND ARE IN DIRECT CONTACT WITH THE SUSPENSION, FREE TO MOVE AND CHAFE. WHEN ANY OF THE 12 VOLT POWER WIRES RUBS THROUGH AND THE BRAKES ARE APPLIED IT WILL CREATE A DEAD SHORT, BLOWING THE FUSE IN THE TOW VEHICLE AND LEAVING THE DRIVER WITH A 15,500 POUND TRAILER WITH NO BRAKES TO AID IN STOPPING. THE ATTACHED PICTURES ARE OF THE DRIVERS SIDE.

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WE WERE IN ROUTE TO ASSATEAGUE FOR THE WEEKEND WHEN OUR AWNING SOMEHOW OPENED & DETACHED FROM OUR CAMPER WHILE DRIVING AT HIGHWAY SPEED ON RT 50 IN MARYLAND. I BELIEVE IT FAILED DUE TO BEING BLOWN OPEN BY THE WIND, BUT I AM UNSURE. WHEN IT DETACHED, IT VIOLENTLY FLAILED AROUND DAMAGING THE EXTERIOR OF THE TRAILER. WE WERE ON THE CHESAPEAKE BAY BRIDGE WHEN THE EVENT OCCURRED WITH THE AWNING FLAILING AROUND BY CARS & THE BRIDGE STRUCTURE. AS SOON AS I HEARD THE SOUND, I IMMEDIATELY DROPPED OUR SPEED TO A CRAWL & STARTED LOOKING AROUND AND SAW…

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The contact owns a 2020 Grand Design Momentum RV. The contact stated that while the RV was parked, the contact heard an abnormally loud popping sound coming from behind the sleeping cabinets at the camping ground. The contact performed an inspection and noticed that the 110-volt electrical wires in the RV had shifted during travel and were touching the subframe of the RV. The contact noticed smoke coming from underneath the RV, and the refrigerator circuit braker then tripped. No warning lights were illuminated. The RV was taken to the dealer, …

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The contact owns a 2021 Grand Design Recreational Momentum. The contact stated that while having maintenance work completed on the RV, the dealer removed the nose cap and noticed that the insulation and the mylar tarp near the rear of the RV was burned. The contact was informed that the wiring on the nose cap had been overheating and causing the burn. The dealer had reconnected the wiring but had not repaired the RV. The manufacturer was made aware of the failure. The failure mileage was 40,000.

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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 dr…

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The contact owns a 2024 Grand Design Recreational Momentum. The contact stated that after the RV was delivered, the brakes were inoperable, a slice was cut in the wiring harness with electrical tape covering the cut, the slide-out frame was out of alignment and unable to close properly, the awning had detached, and ABS was not equipped in the RV. Additionally, there was water intrusion in the RV, resulting in mold. A mobile independent mechanic replaced the brakes and wiring harness; however, the RV was not repaired. The manufacturer was made a…

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The contact owns a 2019 Grand Design Momentum 49M hitched to a 2017 Ford F-350. The contact stated that while the RV was parked, the driver’s side bedroom slide-out failed to extend as intended. The RV was taken to a dealer, where the failure was linked to frame flex. The contact was informed that there were four cracks in the frame of the RV. The RV was not diagnosed. The contact stated that the manufacturer was notified of the failure. The failure mileage was approximately 30,000. The VIN was not available.

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The contact owns a 2021 Grand Design Momentum 397 Fifth Wheel. The contact stated that there were tears in the metal of the subframe. While driving at unknown speeds, the RV was bouncy. After connecting to a truck and towing the truck, the RV became unsteady. The local dealer was not contacted. The RV was not diagnosed or repaired. The manufacturer was contacted and referred the contact to the frame manufacturer. The contact called the Lippert manufacturer and was informed about measuring the distance of the subframe. The failure mileage was un…

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VIN: [XXX] 2022 Grand Design Momentum 395ms has frame failure and welds are breaking, cabinets slowly dislodging from interior walls. Also, not in my case yet but many have their pin boxes coming loose while driving down U.S. roadways. This is a danger to owners and others on the road if they finally break. Grand Design's Service Response Team came out to verify our frame failure and said it is just within tolerance but it is happening and that we needed to take it back to Grand Design to get it repaired as soon as possible. I have an [XXX] …

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The contact owns a 2023 Grand Design Momentum. The contact stated that the trailer was shifting on the frame. The contact stated that the welds, bolts, and frame were fractured, and while driving, the frame flexed unexpectedly. The trailer was taken to the local dealer, but the diagnosis was not provided. The trailer was not repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was unknown.

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