NHTSA Complaint #11422348 — 2021 HONDA PASSPORT

When I bought vehicle it came rated with 5000lbs towing. To achieve that towing rating I had to buy and get installed the Honda Transmission Cooler. I got the kit installed and right after install there is a noise when the vehicle shifts from 7-8 gear. It sounds like rumble strips. I did some research and there are others who have the same issue. See link to Honda passport forum. https://www.passportforums.com/threads/noise-when-shifting-from-7th-to-8th-gear.2923/ Took vehicle to dealership and they looked it over. They checked fluid level and spoke to Honda tech support. The dealership told me that Honda knows about this and if they fix it they will let me know. To me this means that this is a known engineering defect and they didn’t say if they have a fix or not. The reason I bought the vehicle was because of the towing capacity. To get the towing capacity I had to install the trans cooler. I paid and had it installed and now the vehicle does not run like it did when I bought it. As for safety risks there could be unforeseen issues. Because the transmission is now making a noise of unknown origins it could get damaged and cause a loss of power/malfunction. The noise (through fluid dynamics) could also cause damage to the cooler causing the transmission fluid to leak out and cause the vehicle to lose power.