Rock Solid Cargo Box Trailer Problems by year

ultimately resulted in the trailer being declared a total loss.A replacement Lippert axle was subsequently installed. After only approximately 1,400 miles, the wheel end began smoking. Inspection revealed severely blackened/burnt grease, indicating excessive heat and another potential bearing/lubrication problem.Because of these repeated failures, when I purchased a brand-new 2026 36-foot enclosed cargo trailer in June 2026, also equipped with Lippert axles, I specifically requested that the bearings, hubs, spindles, and grease levels be inspected BEFORE I took possession or operated the trailer.That pre-delivery inspection revealed very little grease in the wheel-end assemblies and at least one bearing was already damaged. These conditions were discovered before I operated the new trailer, eliminating normal wear, mileage, or my maintenance as potential causes. My understanding is that Lippert supplies these axle assemblies to the trailer manufacturer already assembled. I therefore believe NHTSA should investigate Lippert's manufacturing, bearing installation, lubrication, assembly, and quality-control procedures. These conditions create a serious highway safety risk. Inadequate lubrication or defective bearings can cause overheating, bearing seizure, hub/spindle failure, wheel separation, fire, trailer instability, jackknifing, loss of control, serious injury, or death. This is now more than one Lippert-equipped trailer with serious bearing/lubr

not returned to service until 8/4/2023. In addition to the axle failure, the trailer experienced repeated structural weld failures. Rear ramp door welds required repair on 1/7/2023 and again on 9/24/2023. On 7/16/2024, the trailer experienced catastrophic structural failure, including separation of the side wall from the floor and failure of structural welds. The trailer became unsafe for continued highway use. The manufacturer supplied a replacement trailer, which was ready on 1/31/2025 and picked up on 3/23/2025. The replacement trailer also developed early structural failures within months of normal use, including: Man door hinge failure (May 2025) Ramp door upper and lower weld failures (January 2026) Ramp spring assist weld failures (January 2026) Side wall upper and lower structural separation (February 2026) The repeated occurrence of similar structural failures across two separate trailers suggests a potential manufacturing or design defect rather than isolated damage or misuse. These failures compromise the structural integrity of the trailer body and cargo containment during highway travel and present a significant safety risk to the public, including risk of cargo release, structural collapse, or crash hazard. I am submitting this complaint so that this recurring structural and axle defect can be reviewed for investigation to prevent similar dangerous failures involving trailers of this type. #supplied-1st unit [[redacted]] -2nd unit INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)