My 2002 Saturn sc1 started shifting extremely hard, and now slips also. Its giving the code for torque converter clutch solenoid which im not sure it has one. Which solenoid should I replace?

You should replace none. Testing should be performed to determine the real source of failure. Codes do not indicate faulty components specifically; more accurately, they indicate something not working as designed and troubleshooting will reveal why. www.repairpal.com/repair-shops