Car jerks into 1st gear when stopping at a light and accelerating. Car gets stuck in 4th gear and will not accelerate until it reaches 4th gear speeds. Very dangerous to be trying to get up to highway speeds and car not wanting to accelerate beyond 10-20mph. Car is not safe to drive. Took to a Kia dealership and they said they couldn't replicate. I told them to drive the car more and they were able to replicate, however no check engine light has appeared so Kia dealership is telling me they can't do anything. They told me to keep driving it and bring it in if it gets worse. I do not feel safe driving this vehicle anywhere. Car has 67,000 miles on it and I am the second owner since 10,000 miles. I have done all maintenance that is required/needed all at the dealership.

Update from Oct 27, 2021: Transmission went out. Had to take to another shop to diagnose the issues. Took back to Kia and they replaced the transmission (at my cost). Kia would take no fault even though I have done all required maintenance at the dealership. $3000 later I have a new transmission.

My truck has been having this issue for several months now where its like when your driving a stick and you don't take your foot off the clutch fast enough you get that sensation like your going to stall but you don't. Well...I have had the dealership run scans and check for malfunctions several times now and they keep saying that they can't find anything. I have witnessed my RPM's jump from 1-3 and back down quickly while driving at a consistent speed on the highway. When this happened its almost like the engine lags for a couple seconds and I have on several occasions been concerned that it will just stall on me. It has not happened yet but I really wonder if this is a problem of the dual transmission option. I have never used the manual option so I'm not sure why it is doing this. When I brought it in initially the mechanic told me it was probably caused by using the ECO button which I had not been using either.

For now I have to just hope and pray that nothing drastic happens cause they can't explain why my transmission is doing this. Please tell me I'm not the only one experiencing this.