Toro Z5035 zero turn tranny problem

just traded for this one, have about 600 bucks in it, has a 50 inch cut, good kaw engine, dont know what trannys it is running BUT the dreaded "left side stop pulling after 30 minutes" is happening. wondering what i need to do, junk it for parts or rebuild the tranny or buy a new or used tranny. i do have the number of the tranny but do not know if it is an ezt.
zc-dfbb-5w5a-3cpx
any help is appreciated