Where is the lockup solenoid on 1990 Nissan 300zx?

The lockup solenoid on a 1990 Nissan 300ZX is typically located within the transmission, specifically in the valve body. To access it, you may need to remove the transmission pan and filter. It's recommended to consult the service manual for detailed instructions and to ensure proper diagnostic procedures are followed if you're experiencing issues related to the lockup function.