Is it D or S for a long downhill? The answer is S-slot
What is the S or second gear on the automatic transmission car used for? So how dangerous is the long downhill long downhill section that most of us driving might encounter?
Many people's concept of long downhill is a few kilometers downhill of mountain roads, that is, you have not been to the Yunnan-Guizhou Plateau, often tens of kilometers of long downhill, have you seen? Manually transmitted vehicles can control the speed by hanging the gear in the low gear during long downhills, using the engine's anti-drag.
Automatic models must not be low-grade downhill, because the low-end is ECU-controlled, in the case of continuous acceleration of the speed, only automatically upshift, so that only the brakes can be used to control the speed, after the speed is reduced, wait until the downhill time will automatically upgrade, the cycle repeats, resulting in an increase in the burden of the brake system. What if your car does not have M, S or 2nd gear?
All in all, brake thermal attenuation is definitely not alarmist, M gear, S gear or L gear must be there, their role is definitely not decoration. Have you learned to make reasonable use of every function of the vehicle to minimize the risk during driving? Thanks for your attention, favorite, likes, your support is my endless motivation.