Questions & Answers about Převodovka je nová.
- převodovka = gearbox or transmission
- je = is
- nová = new
So the sentence is literally Gearbox is new, which in natural English is The gearbox is new or The transmission is new.
In this sentence, you can tell partly from the noun ending and partly from the adjective agreement.
Many Czech nouns ending in -a are feminine, and převodovka is one of them. Because it is feminine, the adjective must also use the feminine form: nová.
So the sentence itself gives you a clue:
- převodovka → feminine noun
- nová → feminine adjective form