Automatic transmission will not go into drive 1999 Daewoo Leganza?

If a 1999 Daewoo Leganza's automatic transmission won't engage in drive, it could be due to several issues. First, check the Transmission Fluid level; low fluid can prevent proper shifting. Additionally, a malfunctioning transmission solenoid, a faulty shift cable, or internal transmission damage may also be to blame. It's advisable to have a professional mechanic diagnose the issue for a proper fix.