2000 chevy metro leaks transmission fluid
Yea! A Metro owner. Welcome. Well, you have such a big, burly wrap-around engine in there, it's gonna be hard to see the...lol, just kidding.
So, it's an automatic, I presume? There aren't that many places for them to leak, fortunately. The obvious places are the pan gasket for the bottom pan on the transmission/transaxle case, the two cooling lines coming out of the case and going to front of car to a fluid cooler either mounted in front of the radiator or in the radiator assembly itself, and the two drive axe seals. There is a hidden seal on the front mainshaft, but if it is leaking, fluid would come out on the lower plate between the transaxle and the rear of engine. The plate may be or have an inspection cover to remove, but the fluid would be dripping out the very bottom there and fluid would be present inside the inspection cover.
That should cover the main leak prone areas. Sometimes a dipstick tube's O-ring may fail and oil seeps out around the tube.
Good luck with the metro. Once you find the leak, it should be pretty apparent how to fix it. Installing driveaxle seals would be hardest, or most involved.