Which of the following may indicate that a transmission is failing?

A delay in shifting is a significant indicator that a transmission may be failing. This symptom suggests that the transmission is not responding correctly to throttle input or is struggling to engage the appropriate gear at the right time. Proper transmission function relies on smooth and timely gear shifts to optimize vehicle performance; delays can lead to poor acceleration, reduced power delivery, and ultimately, further issues within the transmission system.

In contrast, smooth acceleration, consistent gear engagement, and quiet operation typically indicate that the transmission is functioning well. Smooth acceleration shows that the vehicle is responding correctly to the driver’s input without hesitation or struggle. Consistent gear engagement indicates that the transmission is correctly selecting and maintaining gear positions as expected. Quiet operation often suggests that there are no internal mechanical issues or abnormal noises, which are often associated with failing components. These symptoms support the idea of a properly functioning transmission rather than signaling a problem.