What causes my 87 Cadillac not to kick into passing gear?

If your 1987 Cadillac isn't kicking into passing gear, it could be due to a few potential issues. Common causes include a faulty throttle position sensor, issues with the Transmission Fluid level or quality, or a malfunctioning kickdown cable. Additionally, problems with the transmission itself, such as worn components or a failing governor, could affect its ability to shift into passing gear. It's best to have a professional diagnose the issue for accurate troubleshooting.