When should automatic transmissions typically be downshifted?

Downshifting an automatic transmission is crucial to optimize engine performance and maintain control of the vehicle, especially when going down grades or downhill. When descending a slope, the vehicle's weight causes it to gain speed due to gravity. By downshifting, the engine can utilize higher RPMs, which increases engine braking. This helps to prevent the vehicles from accelerating uncontrollably and allows for better handling around curves or during sudden stops.

In situations like right turns or entering a city, maintaining a higher gear can often be sufficient, as these scenarios typically do not demand the same level of control over speed and braking. Reaching a speed limit may not necessarily require downshifting, as many automatic transmissions are designed to shift smoothly within the appropriate speed range. Thus, downshifting should primarily occur when driving down hills to effectively manage speed and preserve braking systems.