Nothing. It's shared.
Transmission 1qt Primary 1qt
There is no transmission drain plug. Your transmission uses the same oil from the primary. Draining your primary drains your transmission.
The transmission and crankcase are one piece on a Sportster.
40 oz.
through the clutch inspection cover. The Primary and transmission share fluid.
Primary oil and transmission are the same. The crankcase is different. They are separated.
The '99 Sportster uses three quarts of engine oil, and one quart of Sport-Trans in the Primary/Transmission.
sportsters do not have a separate transmission, it is actually integrated into the cases and does not have its own oil supply. the oil you put in the primary also works as the transmission lubricant by flowing back and forth from primary to tranny.
The oil drain plug is at the bottom of the oil tank (for engine). Bottom rear of primary case for primary & transmission.
Evolution and later Sportsters use one quart of Sport-Trans in the Primary/Transmission.
That plug is the drain plug for the primary and transmission oil supply.
The transmission on a 2003 Sportster is to the rear of the cylinders, just below the starter motor. If you kneel down on the left side of the machine and face the engine, the transmission is in a direct line behind the "derby" cover (the large dome cover in the primary) to the other side of the engine.