While driving my 2017 Ford Focus SE (automatic), the vehicle began experiencing severe transmission problems including hesitation, shuddering during acceleration, jerking between shifts, and eventually a complete failure to engage any gear. The car became inoperable in traffic, posing a serious safety risk to me and others. There were no warning lights or messages prior to the failure. I took the vehicle to a certified Ford dealership, and after performing a diagnostic inspection, they confirmed the transmission had failed and needs to be completely replaced. The symptoms are consistent with widespread issues linked to the DPS6 PowerShift dual-clutch transmission used in Ford Focus models from 2012 to 2018. Ford is aware of these defects, as documented in multiple Technical Service Bulletins (including TSBs 16-0109, 17-0044, and 18-2358), and several class action lawsuits. Despite this being a known and well-documented defect, Ford has refused to provide any assistance or coverage for the repair, citing the expiration of the basic warranty. I believe this is a manufacturing defect that should be covered regardless of mileage due to the nature and safety risk of the failure. The transmission issue has been diagnosed and confirmed by a Ford dealership and the vehicle is available for inspection upon request. I am filing this report because I believe this issue continues to put drivers at risk and warrants further investigation and action by NHTSA.