I have a trans leak making me nutso. I keep thinking I know where the leak is but after new parts in the spot (speedo cable output, dipstick, rear band apply shaft) It still leaks. I run the trans through the gears while driving the car till hot and then top up to the hot mark on the dip stick with the engine idling in neutral. The fluid level is fine till the car sits.

Here's the questions - After sitting a few days to a week the fluid level on the stick goes way up. I've assumed it's due to converter drain back because after driving the car the level on the stick goes back to were it was when I topped it off originally.

So is converter drain back normal on a A-727? I don't know the year of the trans, but it's the common cable shift type from the 60's/70's cars and trucks.

And

Is it impossible to not have a leak when the fluid level gets above the top of the pan after the converter drain back? The Mopar I had before this one seemed to have the same converter drain back but didn't leak.

I'm stumped.