1997 Volkswagen Jetta GLS - Transmission Problem

1997 Volkswagen Jetta GLS
2.0 5 - Speed Manual
Run's And Drives Great ,
Only Problem Is The Transmission Is Bad
It Has NO Reverse , But All The Other Gears Work Fine

SO IM NOT SURE IF I HAVE TO PUT A NEW TRANSMISSION IN IT OR CAN I FIX THIS ONE ??