that,s really a very tense condition i also have cuore 2000 same problem leakage of oil.when u park yours car after 5 to 6 h ,standing in front of yours car where the oil present on the floor center or right or left under the car.there are some rubber seals which one are dangerous gear lever seals ,gear box jean,shaft seal if these are faulty then the gear box shell be removed out from engine. but there will be possible the reverse switch or (goda) seals leakage so don,t worry this is simple work in my case my cuore,s (goda) seal and gear box jean was faulty, now this is ok good luck