TRANSMISSION'S ALL LEAK

[ACUDANUT]

  Okay, what's the deal.  All of my cars seem to leak tranny fluid when parked.  They all are BB 727's.  I have tried everything under the sun to keep them from leaking, and I have come to believe this is normal. Am I crazy ?

[Plumcrazy]

There's no reason they should leak.  I would try cleaning them off and then add some UV tracer dye to the fluid. Every leak has a source, the dye makes it much easier to see.

[krnai555]

  Okay, what's the deal.  All of my cars seem to leak tranny fluid when parked.  They all are BB 727's.  I have tried everything under the sun to keep them from leaking, and I have come to believe this is normal. Am I crazy ?

I know this is old, and chances are I might get no response, but I gotta try! Im having a similar issue. When I drive the car there is no leak. Everything is perfect. Even about 40 minutes after parking the car, theres no leak. But after about an hour or so, tranny fluid starts to slowly drip out. Its not a ton, but it is leaking. I replaced the gasket to the pan and am pretty sure theres no leak from there.

If you found a way to fix yours please let me know!

Thanks

[John_Kunkel]

When cars sit for a while the converter drains back into the trans and raises the fluid level, this is when some leaks appear. A properly sealed trans shouldn't leak even with the elevated fluid level.

As stated above, the only way to stop leaks is to pinpoint the source. Some leaks can be found easily by merely cleaning the trans thoroughly with brake clean and follow the drip to its source.

[histoy]

 If you'd like to try a seal restorer, here's a good one.   ATP - AT-205-Reseal.  You can order it from Amazon for $10 or less.  We bought a '64 Corvette that had been driven less than 700 miles in 12 years.  The transmission was leaking from several places.  I added 1 bottle of this and it sealed all the leaks.  When the car sat all last winter and the converter drained down, I had only 1 small spot on the garage floor, and it resealed the first time I drove the car this year.  I added the sealer 2 years ago, and I haven't had to add any fluid since.

[Mopar Nut]

  Okay, what's the deal.  All of my cars seem to leak tranny fluid when parked.  They all are BB 727's.  I have tried everything under the sun to keep them from leaking, and I have come to believe this is normal. Am I crazy ?

I know this is old, and chances are I might get no response, but I gotta try! Im having a similar issue. When I drive the car there is no leak. Everything is perfect. Even about 40 minutes after parking the car, theres no leak. But after about an hour or so, tranny fluid starts to slowly drip out. Its not a ton, but it is leaking. I replaced the gasket to the pan and am pretty sure theres no leak from there.

If you found a way to fix yours please let me know!

Thanks

Check the neutral safety switch and shifter seal in front of the nss.

[ws23rt]

The dipstick tube to case seal could be a place that might only leak after convertor drain back.

[ACUDANUT]

Good luck. 

[A383Wing]

shifter shaft seals are the main leak when converter drains back into trans

[Bronzedodge]

Yeah, I'll agree - dipstick tube and low reverse band linkage shaft.  It's not the pan gasket, it's just above in front of the tailstock.  I've known a lot of folks replace the shiftier shaft seal and forget the inner seal for the throttle lever also.

[John_Kunkel]

The dipstick tube to case seal could be a place that might only leak after convertor drain back.

The "FULL" fluid level is above the tube seal. Most of the seals are below the full level.

[Ghoste]

And it isn't unheard of for the dipstick tube to have a stress crack in it down near the point where it enters the trans.

[Challenger340]

Nope, not "normal" to leak.

1969, so a 46 year old BB H.D. 727 original to the car, rebuilt once back in the 80's, not a drop... ever.

Have you had your transmission out and resealed complete ?

[birdsandbees]

My 440 Auto Bird has never put a drop of fluid on the floor in the 26 years that I've had it.