First post here. Have a 2000 Boxster that I track. Last weekend, noticed some slippery stuff on the floor of the garage at the track. Like motor oil, but might be brake fluid (it was lighter in color; I use RBF 600). Anyway, went poking around and found possible source. There is a place on the right side of the tranny (if you are looking at the rear of the car), on the top - a small tube protruding from the top, at an angle, with a small black, plastic cap (see photo). The cap is loose fitting, but does not come off (I can spin it and lift it a bit, but it's not meant to come off without more force). The area around this port was wet. I did not check my clutch slave cylinder, but a guy had a transmission at the track and he showed me where that it. I may have to go back and look. Clutch performed well over the weekend, and I didn't notice any brake fluid loss in the master cylinder in the front of the car.
Does anyone know what this port is, and could it be, would it make sense, that this is a source for a leak? If not, then I've got to look at the slave cylinder.
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