I suppose I'd better introduce myself before launching into a question, especially in my first post! I joined this site a while back, but so far have been just reading and learning. Thanks to everyone for the technical and other posts -- they have been very helpful in my understanding of my new car.
I recently acquired an '02 Caterham "America," which is the car produced specifically to compete in the SCCA E Production class. It has the SVT Zetec and Quaife/T9 5 speed. I've only had the car for a couple of months, and have been itching to get to the track and drive it. I finally got out last weekend, and managed a first in class in my very first race. Gotta credit that to a great car!
Anyway, after this first track weekend, I noticed a substantial amount of transmission oil sprayed all over the tunnel and underneath the floor pan. I've managed to trace it back to a leak from around the cap situated behind the shifter, at the very top rear of the gearbox. (I'll call this the shifter "box," as it appears to be walled off and separate from the main gearbox.) This "cap" (I don't know what it should really be called) is about 2" in diameter, and appears to press into the back of the tail housing without a gasket. There is a small lip in the case at the bottom of the area where the cap presses in, which is where the oil was leaking out. It appears to be there intentionally to allow for breathing or seeping of excess oil -- it does not look like a chip or break in the case.
I checked the oil level at the fill plug, and it's up to the bottom of the plug. The shifter box still has a lot of fluid left in it as well. It appears that the last time the gearbox was serviced, the shifter box was filled with transmission oil, and that excess (?) oil is what has leaked out.
My question is this: Should the shifter box have been filled and kept filled? If so, should I seal up the lip at the bottom of the cap so that the fluid does not leak out again? I've searched to find information about this gearbox, but with little success. As the shifter box is not open to the rest of the gearbox, it appears to me (novice mechanic, at best) that it should be lubricated by a heavier grease, rather than transmission fluid, and that the two would not necessarily mix. This would explain the lip/opening at the bottom of the cap -- if the shifter mechanism is lubed by grease rather than transmission oil, a small opening would not allow the grease to spill out. I'm not sure this makes any sense, hence my question.
Does anyone know these gearboxes, and have any advice for how this part of the unit should be lubed and sealed? Thanks in advance for any replies/advice.