skyliner34steve

hey my name is Steve i just joined as i have a problem with my new car i bought four days ago guy told me that its stuck in 3rd gear 1,2,4 gear does not work i have been told it is a solenoid and then an inhibeter switch sorry my spelling i am Afrikaans and English is not my strongest speaking language. the car i have is a skyline r34 gtt nismo skyline fourdoor rb25det fully stock in and out and its triptronick have anyone fixed this problem and can give me a answer asap as just waiting apon the part that i will need to fix this thanks