Wow must be the time of the season for this issue....my 78 has been out of commission for probably 4 months now, the transmission started acting up, it would drop gears, not upshift and the speedo was acting wonky....today I crawled under the car, assuming I would need to pull the tail end off....I noticed fluid leaking from the tail end...the more nuts I removed on the flex disc...the more fluid was failing out...finally got the disc off, and the nut was just sitting there....yoke pulled right off....turns out the idiot who rebuilt the trans in 2003 never replaced the nut...or staked it.....so now I am ordering the nut, missing washer and socket to put it all back together....guess this is a common issue...

__________________