strange c4 leak when car has been sitting

[enferno]

i have a '66 coupe, 302 and a rebuilt c4 (10k miles on it or so). everything runs great, however, if i don't drive the car for 10-14 days (i work from home so not uncommon) the c4 will dump fluid on the driveway. this is ONLY when the car hasn't been driven or moved in about ~2 weeks. what would cause this? it never leaks a single drop when it's driven regularly, and i've crawled under to double check. any thoughts?

 

[Realmongo]

That's not unusual for these older transmissions. The old seals tend to dry and shrink up from lack of use, but then swell up once they have fluid circulating again.

 

[hipo_p51]

it more than likely leaks out the tail shaft seal. i have seen this on my own cars. just drive it more often, problem solved.

 

[hungrymonkey]

The last 3 C4's I have had, leaked from the tail shaft seal. Usually when I parked on an incline and not driven them in awhile.

Although mine seemed to leak a bit faster than a couple of weeks.

 

[Realmongo]

Another common leak point is the seal for the shift lever.