Your gear shift is broken you have to pull it up change gears What problem?

The problem is that the gear shift mechanism is designed to move in a specific pattern (typically up and down, and left and right) to engage different gears. If you *only* have the ability to pull it upwards, you're severely limited in your ability to select the appropriate gear for your driving needs. You won't be able to downshift, and shifting up might be difficult or even impossible depending on the exact mechanism and how far up you can pull the lever. This will make driving extremely difficult, dangerous, and potentially impossible depending on the terrain and traffic conditions.