A search brought this thread up.
My T-350 leaks haha I think everybody's does.
I made a bad show last night at the Monday cruise in. I pulled in a bit late and parked on the level. about ten minutes later there was about a half a qt of fluid on the ground and steadily leaking at the front of the pan. The right side of the car was very slightly lower. It looks like it was coming fron the shifter rod on the left side of the trans and ran around the pan then on the ground. I had to walk over to the local auto parts store and get a bag of oil dry to cover the mess. I was embarassed.
I went for months last year without a drop of leakage. Then near the end of the season the car got moved in the shop and it leaked about a quart. This has happend before. I did find that they pushed it backwards with the shifter in drive.
I did a test after this. I drove the car about 150 miles then checked the fluid while running and in park. level was fine. Then I let the car sit for a couple days. No leaks. Then we put the shifter in drive and pushed it backwards about 60 feet. then pushed it back to it's original spot. It sat over the week end and lost about half a qt in the shallow pan under the car.
I then repeated the test a few weeks later but instead we pushed the car in neutral. It sat again for a couple days and no leaks.
This probably wasn't the best test but I'm really trying to get to the bottom of this occasional leak stuff. It doesn't leak whie it is running, just when it sits for a while. I'm aware of the converter drain back. It still should not leak. None is coming out of the vent either.
I'm considering getting a deep pan and not add the extra fluid. Hopefully the drain back would be less than the 2 qts extra capacity. I only have a 11 inch converter. I do have a good size cooler which is slightly higher than the trans.
What do you think about the deep pan idea.??