Leaking 904 Transmission.

Yes, jack it up, put it on stands and actually go under there with a flash light and look.

RRR- another crystal baller here.

You need to actually put in the work to own one of these cars. Not everything is solved thru the internet. Gaskets fail some times over night. These cars leak, it’s 50year old technology.
Syleng1
On second thought I'm 70 years old and have a bad back. To say if you own one of the older cars you should be willing to crawl underneath it and troubleshoot it is ridiculous. I'm trying to get an idea what the problem is so I can get a feel what it would cost to fix. Im retired and on fixed income. Also my if there's anyone in th St. Louis Missouri area that can help work on it Id appreciate it.