Today, while changing the oil on my 08 957S, I noticed a leak that appeared to be from the transmission. I took a couple of pics and then looked at PET, but I'm having a difficult time seeing where this is on the PET diagram. Can anyone please clarify this leak location (see pics below)?

 

My bet would be the rear main seal. Probably due to a failed oil separator.

 

O ring on the torque converter. Very common.
$5 part
$500 labour (tranny has to come off)

 

+1.
It's the input shaft seal of the torque converter that is the source of the leak.

 

Thanks, guys. I don't know much about transmissions (yet). Is number 5 in the PET diagram below the seal to which you are referring?

Has anyone done this themselves? If so, is it a DIY for a newbie that is meticulous?

 

This also makes me wonder about something else.....I've had an intermittent and faint squeaking on idle for years. What I've noticed is that when I put the car into gear the squeaking stops. Could this be something in the torque converter and perhaps related to this seal?

 

As an update, it was the RMS (oil separator is fine). It is still under extended warranty so I had the dealer do it. The RMS plus a cabin blower motor and pollen filter came to nearly 4K!!!