1992 Ford Explorer Tranny shifting into drive, all others w

Transmission problem
1992 Ford Explorer Four Wheel Drive Automatic

Hi there,

I'm about to buy a used car for only the 2 months being in Canada. I found one which is good in all forms except one part.

The seller told me that the tranny (I asume that is a transmission) is really shifty into drive. To copy her quote:

"The tranny needs some more work I have no idea what or how much. It has decided to be really shifting into drive. All others work great! "

Will this result in a new transmission or could it be repaired and last another 2 months?

Thank you,

Ruud