Can I drive my '03 Ford Explorer with this problem?

Can I drive my '03 Ford Explorer with this problem?

The O/D Off light is flashing. It says check transmission. I hooked up the magic code reader and it said I need a control solenoid pack or something. I'll fix that. Any idea how much it would cost? But I was wondering if I should still drive the car. I only drive a few miles a day. It has 180K miles so I feel like it's been a strong car and if it lasted this long it should be good. What do y'all think?