Last fall I bought a 2000 Boxster S, 6 speed MT that had the typical cracked head/intermix issue. I spent the winter pulling the motor, replacing the head, IMS, RMS, and about a million other items while I was in there. I did not touch the transmission, except to remove and reinstall. I got it all back together and on the road about a month ago. After a couple of drives I started noticing small oil drops on the ground after driving it. It ended up being from the transmission where the shift linkage goes into the housing. I researched it and it seems like a fairly common problem and not that big of deal except to fix it you really need to pull the transmission - something I didn't really want to do again, although I thought I'd be pretty good at it the second time around! Which leads me to the tile of this post... I decided to change the tx fluid and add some stop leak and see what happens... it couldn't hurt anything, right? WRONG! After two days of driving it with the new fluid and stop leak I noticed a stream of oil coming down my driveway and looked under the car and saw a huge puddle of oil directly under where the tx mates to the engine. Crap! At first I thought my RMS went out even though I had just replaced it. But it seemed a lot thicker - like tx gear oil. So back up on jack stands she went. I was really proud of my time - 1 hour and 20 minutes from start until the transmission was on the ground - not counting jacking it up/jack stands. I'm not familiar with transmissions, but apparently there is pretty much the same type of seal as the RMS on the front of the transmission. Now I get to replace this and figure out how to fix the seal at the linkage as well. Feel free to post suggestions for either if you have any. Long story short, I've seen others say the stop leak made things worse and in my case it took a very tiny occasional drip to pulling the transmission. I'm just hoping I didn't ruin/oil the clutch as well....
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