I drive a small automatic car. For the most part, it struggles a bit with steep uphills, and picks up speed when going downhill. That’s to be expected.
But then I noticed some downhills actually slow it down. I’ve noticed during a two-hour motorway trip I often do to visit family, there are some specific downhills, not all, just some, where my car always slows down and I have no idea why.
Ideas?
Depending on the car it may be so quit you can’t. The only other way to know if it’s down-shifting would be to check the RPM gauge when the cars slows on downhills - it should jump up ~few thousand RPM (or kilometers depending on where you live).