Difficulty shifting gears can be a sign of a few different issues, especially if you drive an automatic or manual transmission. For automatic transmissions, it could be a problem with the transmission fluid (low or dirty fluid), a failing shift solenoid, or a worn transmission component. For manual transmissions, it could be a problem with the clutch or the linkages. Whatever the issue, it’s crucial to get it checked out right away, as transmission problems can worsen quickly and lead to expensive repairs if left untreated.