Question edited for clarity.
Question moved to model category.
Error code P0700 signifies that a malfunction has been detected in your vehicle's transmission controls. Most modern automobiles feature a specific control module as it relates to the vehicle's automatic transmission. This module is known as the Transmission Control Module (TCM).
The service and repair manual with diagram will provide you step by step help to locate and fix the problem easily and you will get the manual from the given link https://toolsnyou.com/
If you put new piston rings in the engine without doing anything to the cylinders themselves, you most likely have a sealing problem between the rings and the cylinder walls. This will cause blowby and pressurize the crankcase causing the problem. Also check for a clogged PCV valve.