Why does it always shift from 5th to 3rd gear automatically even when the speed hasn't changed?

2008 Yaris 1.6 automatic, driven 130,000 km. Now, when the engine is cold, it can't shift from 3rd to 4th gear, and it can't accelerate beyond 70 km/h.

I have a question for everyone. I have a 2009 Honda City automatic 1.5. There's some jerkiness when shifting from 1st to 2nd gear, but it's better from 2nd to 3rd. Since it's a used car, I'm not sure how many kilometers it's been driven. Can changing the transmission oil solve this issue? How many liters are needed for a gravity change of the transmission oil?

What could be the reason for a vehicle with an 8-speed automatic transmission to jerk when shifting from 3rd to 2nd gear?

Is it necessary to change the transmission fluid for a 2010 Suzuki SX4 Hatchback 1.6 Automatic that has traveled 160,000 kilometers and hasn't had a transmission fluid change yet? The gear shifting is currently very smooth.

Hey car enthusiasts, how do you guys shift gears with a 1.3L manual? 2nd gear at 20-40, 3rd at 40-60, 4th at 60-80, and 5th above 80!

Hi everyone, when I'm accelerating with my FJ and shifting gears, I notice that the shift from 4th to 5th gear feels more pronounced and abrupt. Is this normal? There are no error codes. It's not noticeable during normal driving, but if I deliberately pay attention to each gear shift, I can feel a slight jolt from 4th to 5th. To notice this, I have to keep the throttle steady without releasing or pressing it more. During the 4th to 5th shift, there's a noticeable abrupt feeling. However, if I ease off the throttle during the 4th to 5th shift, there's no issue at all. Any thoughts or suggestions are welcome. Thanks!

Does the S gear shift up and down? Why can it only be in 1st gear and not in 2nd, 3rd, or 4th gear?

[Shocked] What's up with this car? Starting in S mode, I floored the pedal, the RPM hit 4000 and it was still in 2nd gear without shifting up automatically. It only shifted to 3rd gear after releasing the throttle for 3 seconds.

I have a 2021 model Santana. When I'm driving between 50 to 60 km/h, the gear is in 5th, but the display shows 2nd or 3rd gear. However, the 2nd and 3rd gears seem to be neutral. What's going on?

Why is there an impact when shifting from R to D gear?