[dray551]

Hey everyone, so last month i bought a 2015 FRS Manual and i must say i love the car. however this has happened several times to me. When i am braking coming to a red light usually in fourth gear trying to come to a complete stop stop, at around 20 mph i keep the clutch to the floor and attempt to shift into first, however when i try to shift into first it wont let me and i have to FORCE it in and it makes a grinding sound and my whole shifter shakes. this only happens when i am trying to shift into first at a high speed coming to a complete stop. I have my clutch to the floor the whole time im not taking the clutch out at all. Is this a safety feature or is theresomething wrong? thanks everyone