Transmission Not Go Into Gear problems of the 2012 Kia Motor Optima

Transmission has a hard pull when it down shifts from third gear to second gear and a harder pull on first gear this is a automatic transmission. In regular gears going in drive would actually do fine I noticed a week later when I was out driving for about an hour that the car would not go past second gear so I pulled off the road and had my car towed. The vehicle has never had any dashboard lights come on currently my car is in limp mode and will only go in reverse takes a few seconds to initiate an engage to go into first gear. Dealership does not really want to look at the vehicle if it does not have a check engine light code I have no idea what is wrong with this transmission I have 168,000 miles. It should give you some type of warning that something is going on with your transmission but it does not even light up on your dashboard if you go to press the pedal to accelerate it does not want to accelerate I just recently had my catalytic converter changed out so I know it is not that the gears on the transmission will not go past second gear now it is in what they consider limp mode or default mode someone really needs to look at the transmission on all the 2012 kia Optimas I have been seeing a lot of issues with these cars the lights that are considered as the low beams are not very bright either I just recently had those changed and new ones put in they do not give you enough light if you're driving at night this is a safety hazard.

The car will not accelerate at a safe time frame. For example if I need to cross a busy street. I have to wait until there are absolutely no cars coming because when I accelerate my engine revs but doesn't move. I've been almost rear ended several times because the transmission will not go into gear. The engine will hit 8 or 9 thousand rpm then the transmission decides to catch and throw my head into the seat. Which if there is a car in front of me I have to be careful not to rear end them because of the sudden acceleration.

First thing car was not shifting gears. Dealer replaced transmission. Second occurence pulled out and car lost power was able to pull off road turn ignition off and restarted car was ok. Dealer replaced engine control module. Next occurence Nov 2012 car did same thing restarted was ok engine light went off after 2 days. Now Jan 2013 cold morning started driving engine had no power. I got to a open road slowly pushed accelerator to floor with no response. Car is now in dealership I'm waiting for my phone call.