If the gear shifter feels "notchy", what might be the issue?

A "notchy" feel when shifting gears typically indicates that the linkage or fluid levels may be compromised. The linkage connects the gear shifter to the transmission and is responsible for the smooth transfer of your input when changing gears. If there are any issues with this linkage, such as misalignment, wear, or damaged components, it can result in a rough or resistant feel when attempting to shift.

Additionally, fluid levels in the transmission are critical for ensuring smooth operation. If the fluid is low or dirty, it can lead to inadequate lubrication and hydraulic pressure, which can manifest as difficulty in shifting or a notchy sensation. Therefore, any problems with the linkage and the transmission fluid levels are directly related to how seamlessly the gear shifter operates.

While the other choices may refer to symptoms or issues pertinent to a vehicle's performance, they do not specifically relate to the "notchy" sensation experienced during gear shifting. Therefore, the most accurate explanation for a notchy gear shifter is indeed linked to the state of the linkage or the transmission fluid levels.