1990 Chevy Silverado torque converter locked up

I recently installed a used 700r4 in my 1990 silverado. This transmission had a torque converter, but it was in pretty sad shape. I used the the new torque converter that was in my truck, and worked with the other trans. The problem is when I test drove my truck it acts as if it is a manual trans, ie: it dies when you put it in gear, and it doesn't matter which gear it is in. I suspect that it is a converter clutch apply valve problem, but I'm not sure. I also checked the converter clutch apply valve solenoid for continuity and it was fine. I replaced the other trans because it lost reverse.