Why would your car feel like it shifting gears going down the high way but not in low speeds like in town?

Why would your car feel like it shifting gears going down the high way but not in low speeds like in town?
Automatic transmission shifts can be related to fluid temperatureand some vehicles also have sport style settings that can changeshift quality. If the shifting is irregular and causing unusuallyhigh engine speeds this could be a symptom of transmission gearslippage. Gear slippage can result in transmission damage, andshould be checked as soon as possible. Automatic transmissions arecomplex systems, and their overhaul/replacement can be veryexpensive repairs.