4l60e transmission no first or fourth gear, code P0756

I did a transmission filter and fluid change on my vehicle listed above 4 door and noticed shift solenoid b was broken. I replaced it with a new one from the hardware store but when I went for the test drive, first and fourth gears were gone. I put an obd2 code reader on it and received error code P0756 shift solenoid b stuck off. I'm rather stumped at this point please help? Also there's no blown fuses.