So I dropped my exhaust to install headers (yay). While it is off, I want to investigate my ZF tailshaft leak. Ok, so I'm thinking the rear seal is bad, but I sprayed it down with brake cleaner twice and it still leaks. I haven't started the engine in like a month now (I know, I'm lagging on this project).
The seal is dry as can be, but the oil keeps coming from the yoke center- like along its axis. Is that even possible? Is there a hairline crack or something?
maybe its running from the top, but mmm, for a month now? I clean it up and 3 days later the drops hit the garage floor/
So looking at the pic, the oil seems to come from the flat surface 3/8 inch from the u-joint. I want to call Bill B (the ZF Doc) to confirm, but this would be the first time in my life I ever saw bad d/s yoke metallurgy.