A drain plug gasket is a washer type device made of plastic or other non porous material and is used between the drain plug and the oil pan to prevent leakage when the drain plug does not fit snugly in the oil pan
It should be on the drain plug.
Replace the drain plug gasket and don't over tighten it.
No transmission drain plug. You have to drop the pan, then replace the filter and gasket.
It has an O-ring.
There is no drain plug. You can try to suction out the lube but you really need to remove the rear cover to completely drain the differential. And buy a new gasket (or make your own from gasket stock material) to reinstall the cover; use a gasket sealant sparingly on the gasket and bolt threads to get a good seal.
Replace the gasket with a fiber gasket.
Sorry, no drain plug. You have to drop the pan, change the filter, clean the old gasket from the mating surfaces and add a new gasket whenever you change the transmission oil.
Yes.
There is a fill plug but to drain it you must take off differential cover and replace gasket onto clean mating surfaces.
Could be the leak is coming from higher up like a pan gasket or rocker cover gasket, and collecting on the drain plug. Bad drain plug gaskets usually leak continuously whether the engine is running or not.
The oil drain plug on a 1995 Nissan Pathfinder is located under the engine. Maintenance includes replacement of the oil pan gasket.
Probably just the gasket on the plug (if it's tight). Make sure the plug isn't stripped.