Kia K900 transmission shifts harshly at speeds over 20 miles per hour on Kia K900

Some Kia K900 owners report experiencing harsh transmission shifts at speeds over 20 miles per hour, which may be due to several underlying issues. Low transmission fluid levels are frequently cited as a cause of shifting problems, leading to harsh transitions. Additionally, misaligned throttle position sensors and malfunctioning shift solenoids can contribute to improper shifting behavior. Some owners have noted transmission slipping, which can stem from improper maintenance, a faulty transmission control module, or worn-out clutches, all of which may result in harsh shifts. Furthermore, low transmission fluid levels are often linked to other problems, such as delayed shifting and the vehicle being stuck in limp mode. In instances where the car fails to exceed 20 mph, it may be in safe mode due to an underlying issue, or the transmission could be stuck in first gear. It is crucial for owners to address these issues promptly to avoid further damage and seek inspection from a qualified mechanic if problems persist.