Which of the following may cause difficulty when shifting from 4th to 5th gear?

When shifting from 4th to 5th gear, several mechanical components within the transmission can impact the smoothness and ease of that shift. Each of these components plays a crucial role in the transmission's operation:

Worn shift rail interlocks can lead to engagement issues between gears. These interlocks are designed to prevent selecting multiple gears simultaneously and ensure that the transmission functions correctly. If they are worn, they may not engage properly, causing difficulty in shifting between gears.

The shift lever finger is an essential component that connects the shift lever to the internal mechanisms of the transmission. If it is worn, the connection may not be secure, making it harder to shift into another gear, such as from 4th to 5th. A worn shift lever finger can lead to resistance or misalignment during gear changes.

Blocking rings, also known as synchronizers, are crucial for matching the speeds of the gears being engaged. If these rings are worn, they cannot effectively synchronize the speed of the gears, which makes it difficult to engage higher gears like 5th gear smoothly. When the speed difference between gears is not adequately synchronized, it results in grinding or resistance during shifting.

Considering these points, difficulties in shifting from 4th to 5th