Could an excessively low lubricant level will most likely cause hard shifting?

Yes, an excessively low lubricant level can lead to hard shifting in a vehicle. Insufficient lubricant may result in increased friction and heat within the transmission, impairing its ability to shift smoothly. Additionally, low lubricant levels can cause components to wear prematurely, further exacerbating shifting difficulties. Regularly checking and maintaining proper lubricant levels is essential for optimal transmission performance.