I just got back from my summer road trip in my 14 Subaru Legacy. Normally I do not use cruise control unless my foot or leg gets really tired or painful. I noticed something unusual. I’d be cruising along at a set speed on flat ground, say 2400 rpm at 80 mph and if I turn on the cruise control, within a minute or so, the tach would jump up to 32-3400 rpm. If I shut off the cruise control and held the same speed, I’d be back down to 2400 rpm. The only way to control this was to put the transmission in manual and use the paddle shifter to make sure I was in he 6th gear range.
Has anyone else noticed this behavior with a CVT in cruise control? I also found that when I would hit the resume button after dropping a little speed from using the brakes, the throttle would go WOT and the tack would go almost to redline until the car got back up to speed. Never had a cruise control do that before.