I need help with a grasshopper 928d

[Granitebulldog]

I have a grasshopper 928D. The right drive transmission will not back up or doesn't have reverse. My dealer says it needs a new drive transmission, does anyone have any other theories on this. It does work perfectly in forward. Any help is appreciated. Thanks a lot!

 

[mechanic mark]

1995 Grasshopper 928D Drive Assembly Mower Parts- The Mower Shop, Inc. make sure woodruff key item 4 is not sheared, if it is replace it with Grasshopper part, also check for hydraulic leaks, fluid level at resevoirs, let us know how it goes, thanks.