If one broke, probably the other is rotten too. As they work against each other it is most likely worthwhile to replace the pair -- they're cheap.

Getting them hooked is sometimes a challenge, one I usually solve with a bottle jack under the front edge of the front muffler and an 18" long screwdriver.

The leak from the two screens is under the transmission's torque converter in the bell housing. If it is tranny fluid the source is probably the transmission front seal. Also remember the cooler lines leak right near there.

If it is oil, it is getting there by migrating from somewhere else. The closest place is the rear seal, but that is the worst news, so clean it up and try to locate the real source of the oil if it worries you. At 415K you probably are not on your first rear seal.
--
Art Benstein near Baltimore