Just had a turbo 350 completely rebuilt,got about 100 miles on the transmission.When the car is parked for a long period of time it leaks almost all the dextron out.The tranny does not seem to leak while running because there is no sign of it blowing oil. Took it back to the guy who built the tranny (twice) he kept it for a few hours and said he can't find a leak.Any advice on where it might be leaking,I mean POURING.

Just had a turbo 350 completely rebuilt,got about 100 miles on the transmission.When the car is parked for a long period of time it leaks almost all the dextron out.The tranny does not seem to leak while running because there is no sign of it blowing oil. Took it back to the guy who built the tranny (twice) he kept it for a few hours and said he can't find a leak.Any advice on where it might be leaking,I mean POURING.

Dip stick tube seal?