oil residue inside bellhousing

It is probably a gasket between a bellhousing and an engine block. My started leaking shortly after my clutch and rear main seal were replaced.....

 

Just a guess. freeze plug.

 

Possible it is grease from your throw out bearing. Your rear structure gasket would be an external leak. Only thing left is rear main, grease from throw out bearing, and transmission main shaft seal. I don't see a lot of transmission leaks at main shaft, but it does happen.

 

I had transmission shaft leak once. It was a steady leak when the motor was running drip, drip, drip marking it's spot.

 

had the same problem, kept driving till clutch's worn.

whe we drop tranny to replace clutch I removed flighwheel, replaced seal, fit new bolts and new pilot bearing

 

Look on the bright side...at least you don't have a brakesaver. It's sucks no doubt, I know your pain. I would not use the silicone myself, just a good oil bath and install. Those are very delicate, it don't take much to make a leak.

 

Ran across your thread as I was looking back over some of the older post.... Just thought I'd pass this on as I'm CERTAIN that it will dry up your leak. I had badly worn front main on a 60 series ... forgot to tell the wash rack guys to stay away from it when pressure washing engine. Needless to say, when I got to my south FL. customer and backed into the door.. idled truck to run air as I slept for a little more than an hour. Pulled away and was closing doors when the guy came and told me that I must have a bad oil leak.. walked over to the spot and there was a thick oil spot bout the size of a really big turkey platter! Found out about this product from some of Scotty Kilmer's youtube vids so I called the Mfg to ask how much to add to a fresh oil change. 4 bottles was the answer. So did that and the leak slowed over the next thousand miles or so.... at about 2200mi.. bone dry,.. along with every other little leak on the engine! Never had any increase in temps or any other problems with the motor. I've told many folks about this stuff over the years and have had many of them call me to thank me as it solved their leaks and saved some of them a small fortune. Here's the cool thing.. you can use it in your hydraulic systems... tranny... rear-ends... dino or synthetic! I've even put it in my hubs.. So.. at $10/bottle.. it was the best $40 I'd spent in a minute. If you have questions.. just give'em a call.. they are glad to answer you questions... View attachment 74488