I pulled codes from our '94 today. KOEO: First code is 629, Torque Converter Clutch Circuit Fault. Second code is 176, O2 sensor not switching-system is or was lean-left or front HO2S. Within the past month, we replaced the transmission with one that was professionally rebuilt at a shop near us. I'm wondering if the 629 code could be stored from the previous tranny? Also, the cruise control diaphragm was NOT connected. While at a wrecking yard for some other parts, I noticed how the CC diaphragm was SUPPOSED to be connected. When I got home, I connected ours the way it was on the rigs in the wrecking yard. THEN the CEL came on. For the first couple minutes of driving, no light. If the CC diaphragm caused a vacuum leak, could that cause the computer to store the 176 code? My wife said that it did start 'differently', so i put the line to the CC diaphragm back the way it was. I tried pulling the jumper while the codes were being output, but the codes are still there. And of course, my tabs expire in a few days and I need to run emissions to get new ones. The x seems to run fine, no driveability problems, not sure of the mileage. I'm just curious to see if you experts have any other thoughts and/or options.