I know this kind of a dumb question but I really don't understand it all. So what does the TC lock up solenoid really do? Is the TC suppost to spin with it in gear? I changed out my TC lockup solenoid for manual toggle for overD and now tranny doesn't shift right. Could the lockup be my problem? The car drove fine before this, just not with overD. Could I take out the lockup all together? Do you think this would solve my problem?