UKPassats

So the other night I saw this pop up on facebook seen it a few times before and no one seemed interested but at £200 I couldn't not look at it and ended up buying that night. Aptly named "The Reaper" its quite a sight but at the same time full of nice clean original bits. Now the issue is the auto gearbox only selects reverse been told it's had fluid and filter changed and front solenoid so my guess is shot box? I know nothing about autos but would like to see it drive again so if anyone has some knowledge on autos or an alternative that will fit it would be appreciated!