Hello and thank you for your post. I am a master certified GM tech, with 15 years Saturn experience,and can help you to resolve your issue.
After a case cover replacement , some vehicles may have low power as a result of the transaxle being stuck in an intermediate range. A Service Engine Soon indicator light (for DTC P1882) may also be illuminated.
The variable ratio control lever may be misaligned. This misalignment may be due to servicing of the case cover assembly without removing the valve body.
In order to ensure proper variable ratio control lever alignment, remove the control valve body assembly before the case cover assembly is removed.
When reinstalling the valve body assembly, one end of the variable ratio control lever must be properly positioned in the ratio control motor pintle (location #1), and the opposite end of the lever must be properly positioned in the variable drive pulley follower (location #2), which is located in the case cover.
hope this helps