This was kind of funny tonight. I had my transmission rebuilt this past spring. It has worked great all summer but about a month ago it developed a leak. I don't think it leaks while being driven but it seems to leak overnight or the next day after I park it. So tonight, when I got home from work, I slid underneath again (this time on the driver's side) with a flashlight and I think I discovered where it is coming from. What is this doo-hickey called and how do I fix it?
On a side note, and the funny part, after I took the pics I was uploading them to my computer and enlarged them for a good look. By accident, I finally discovered where the v.i.n. is on my transmission and it is for sure the original transmission as it matches the car's vin. I figured it was the original this spring when I decoded the transmission tag on the passenger's side but this confirms it for sure.