What is a potential consequence of low fluid levels in an automatic transmission?

Low fluid levels in an automatic transmission can lead to slipping gears, which occurs when there isn't enough hydraulic pressure to engage the transmission components properly. Automatic transmissions rely on transmission fluid to operate correctly; this fluid helps to transmit power and lubricate the gears and other moving parts.

When the fluid is low, the transmission may struggle to maintain the necessary pressure, resulting in a loss of grip between the gears. This can manifest as slipping, where the vehicle may unexpectedly change gears or fail to stay in a selected gear, creating a noticeable loss of power and control during driving.

In contrast, while low fluid levels could potentially lead to increased fuel consumption or contribute to overheating, these outcomes are secondary consequences rather than direct effects linked to the primary function of the transmission itself. Hard starts may be related to other issues, such as the engine or electrical system, rather than being directly caused by transmission fluid levels. Therefore, slipping gears is the most immediate and relevant consequence of low fluid levels in an automatic transmission.