@ubi-theberry sorry there was a typo, it's the T150 Thrustmaster. I tried verifying the files and it completed without saying any error or problem. There are no other controllers plugged in when the bug occurs. I tried using only a controller and the police car was changing gears normally. I also tried using the wheel and changing the gearbox setting to "Automatic" and the police car works normally again. I just don't get why that particular car is not working properly with the wheel and the "manual" gearbox setting while all the other cars are working just fine...

I just got the free police car that come with the "Calling all units" dlc but it won't change gear at all. It's stuck in gear 1, it won't go up nor backward. I can take any other car I own and the gears work just fine. I play with the manual gear shifting settings on the Thrustmaster 100 steering wheel. What is going on?