Davoforty

After a very short drive on Sunday on my 79 l82 4 speed I noticed today that I have a small leak. There was maybe a 1 1/2 to 2in diameter on my garage floor this afternoon I tried to take some pictures of where it's coming from I know they aren't the best pictures. Any suggestions? Thanks for your help!

kanvasman

Hard to tell but it appears to be the rear main seal leaking on the transmission. Has the car been sitting for a while? Maybe spray it off with some brake clean and drive it around again. If it comes back I would drop the driveshaft and examine the yoke going into the trans. If it has a worn spot where the seal touches it, it could just be a worn seal, or the yoke itself might be worn out. Neither is a big deal and I am sure there are lots of folks here that would love to help you out. Take it apart and show some pics. Good luck.

HeadsU.P.

That bluish-green droplets on the frame tells me its manual transmission lube. However, I don't believe its from the tail-shaft seal. The shaft, yoke, U-Joint and cap bolts are bone dry. I believe your drain / fill plug is on the passenger side. So is the wet stains on the crossmember.
Hard to say.

Bills17n72

well most of the ole C3s leak alittle oil ,I just put down a piece of cardboard and not worry about it!!

Davoforty

Thank you for the suggestions. I am going to jack it up this weekend to hopefully get better pictures and a better idea. It's strange because I put a piece of cardboard under it yesterday and looked this morning and there were no new drops on the cardboard. Wonder if it is only after a drive it starts to leak. Has anyone ever used any leak seal stop fluid in the oil? Looking at rear main seal leak stop or oil seal type of liquid. I have read positive reviews on them. Thanks again appreciate your help!

jackson

How 'bout start with checking puddle? ... is it motor oil or antifreeze or something else?

forman

you can do the seal without taking it out of the car its not that bad just get yourself a six pack and put some zep on the ol boom box and have at it

HeadsU.P.

Rear Main Seal is at the end of the crank.
Stop Leak in any form you use is a temporary fix. If it can plug up a external leak, it can also plug up an important fluid passage way internally. Its a band-aide in a bottle.

Your picture shows a Tailshaft housing. Maybe it appears moist at the seal but beyond it is bone dry. So dry, that you better lube that U-Joint.
Your leak is elsewhere and is being blown back by road wind.

Big2Bird

It's rust proofing itself. Leave it alone....................

Vettereturned

I only wished that mine leaked like that...

Davoforty

Great feedback, thank you! So on Monday I put a board with paper towels under it to see the color and smell of it but it hasn't had a drip since. Very strange. Also the leak in the garage was already dry and too tough to tell what the color/smell was. Which parts in what picture should I lube up? I thought everything looked dry and good besides that issue. I was also thinking it could be blow back from something else but there are no other leaks. Strange for sure!

HeadsU.P.

Your photo of the U-Joint reveals a grease fitting. Do the back one too. And all the half-shafts grease fittings. 6 in all.

If they all look as rusted as the front one, spray 'em down with some WD40 to repel more rust.