parts; helical gear, toro, self propelled lawnmower
 

Inside the the toro self propelled mower's gear box are two main
gears, a worm
gear and driven helical gear. Every site I go to lists the worm gear,
but none
the helical. Model is 16775,sn 9007923. Any idea why this particular
part would
not be listed? I'll call around on Monday but hope maybe someone
knows why...
and maybe where I can find one. The whole gearbox is $250 or so.
Thanks