Small Engines (Lawn Mowers, etc.): Snapper LE1433H, hydro drive, drive tractor

Question
I too have this Snapper that has a good reverse but will not go forward. Just like a previous poster. (/07 I think)
The Mod is LT140H330BV, S/N 85526555 and there is noted on the same tag Part 84238.

Any help will be appreciated.  

Answer
Is you model number LT140H33DBV 33" 14 HP Hydro Drive Tractor Series D?

Snapper Model # 84238

Snapper manual link:  http://bsintek.basco.com/BriggsDocumentDisplay/default.aspx?filename=ahinuJvLlSZ...

Owner's Manual link:  http://bsintek.basco.com/BriggsDocumentDisplay/default.aspx?filename=dgjqwJvLlSZ...

Hydro Gear (transmission) Tuff Torque K55

I believe you have the hydro...is this correct?

Have you checked the hydro oil level?

Let me know.
Eric