What could be the reason that the manual paddle shifter on the 11th generation Sonata won't shift past 3rd gear?

My 2018 GS7 has run over 50,000 kilometers. Occasionally, I feel a slight jerk when shifting from 2nd to 3rd gear. What could be the reason for this?

My 2012 C30 has been driven for 78,000 kilometers. Now, when I drive, the 2nd and 3rd gears feel jerky and lack power. What could be the reason?

What could be the reason for a Haima S5, 2016 model Enjoy Edition, not moving after shifting gears without accelerating?

Is it a problem with the gearbox if sometimes the 4th gear won't shift down to the 3rd gear in a 2015 Honda City with a manual transmission? Waiting online for someone knowledgeable about cars to answer.

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

What could be the reason for not being able to shift gears when the car is cold?

Car enthusiasts: Sometimes when driving a small car, the D gear won't shift up. The RPM suddenly goes up, but the gear doesn't match. What could be the reason?

What could be the reasons for not being able to shift gears?

What could be the reasons for not being able to shift gears?

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