Welcome to this forum! It sounds most likely that your intermediate band is broken as Glacier991 previously stated. You could try to adjust the intermediate band to confirm this theory. If the adjusting stud keeps tightening without stopping, then you will know that the band is broken. If it does tighten up to 120 In/Lbs, then back it off 2 turns, and see how it drives. If it still doesn't go into 2nd gear, then your servo piston could be rotted out. The governor could also be stuck if this happens when it's cold, but goes away when it warms up. Check the modulator's vacuum line for leaking ATF if you have problems in other gears as well.