C6 AUTOMATIC POURING FLUID ONCE ENGINE IS TURNED OFF - 460 Ford Forum
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post #1 of 13 (permalink) Old 11-19-2010, 04:43 PM Thread Starter
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C6 AUTOMATIC POURING FLUID ONCE ENGINE IS TURNED OFF

I have a 1977 ford c6 automatic transmission that pours out about 3oz of fluid between the torque converter and dust shield/bellhousing as soon as the engine is turned off. it has a NEW front seal, NEW torque converter and 11 quarts of fluid in the transmission including whats in the converter. can anyone tell me whats wrong? NOTE: IT ONLY LEAKS FOR A FEW SECONDS ONCE THE MOTOR IS TURN OFF

Last edited by blownstroker; 11-19-2010 at 06:55 PM.
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post #2 of 13 (permalink) Old 11-19-2010, 06:38 PM
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Front seal or cracked case or pump gasket.......IMO........11 quarts???????
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post #3 of 13 (permalink) Old 11-19-2010, 07:01 PM
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Did you install the trans with the converter bolted to the flexplate or with the converter installed onto the input/stator support?
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post #4 of 13 (permalink) Old 11-19-2010, 07:29 PM Thread Starter
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leaking c6

i installed the motor and transmission together then bolted the converter to the flexplate once it was in the truck

Last edited by blownstroker; 11-19-2010 at 07:37 PM.
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post #5 of 13 (permalink) Old 11-19-2010, 10:08 PM
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Sounds like a pressure relief problem I would think VB or front pump.

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post #6 of 13 (permalink) Old 11-20-2010, 10:04 AM
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You state that it stops leaking once turned off ? I've had a simiular problem with a different trans it turned out that the converter was leaking where the two halves are welded together. Your leak could also be from the front pump seal,gasket,or oring, or even a pump bolt if not torqed to spec. Hope this gives you some direction good luck.
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post #7 of 13 (permalink) Old 11-20-2010, 10:13 AM
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I had one that was doing something very similar to that. I replaced the seal and it still leaked. Didn't stop until I put a new bushing in the pump.
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post #8 of 13 (permalink) Old 11-20-2010, 12:31 PM Thread Starter
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leaking c6

Thanks for all the help
i will remove the transmission when i have time and keep you guys posted.
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post #9 of 13 (permalink) Old 11-20-2010, 01:20 PM
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You can also check the band lever pivot pin. The pin gets inserted through the bellhousing area below and off to the side of the pump. There is a cup plug that holds the lever in there. Sometimes the plug leaks. Leave the plug in there, clean out that hole with the brake clean then fill it with RTV.


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post #10 of 13 (permalink) Old 11-20-2010, 01:38 PM
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Before you do that....I'm sure that you've checked to be sure that the tranny ISN'T overfilled. I just don't remember the c6's taking that much fluid. I know the GM's do.....The problem of leaking out of the front is characteristic of a worn seal/pump bushing/worn converter....when the converter drains back, when it's off, it fills the body past the seal level. Having the tranny overfilled will make it even worse, not to mention it will foam the fluid because all the hard parts are running in the oil and frothing it. Just a FYI before you go through all the work of pulling it.
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post #11 of 13 (permalink) Old 11-20-2010, 01:43 PM
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C-6 with a stock convertor takes about 12 quarts total. If just doing a drop pan service they will take about 6.


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post #12 of 13 (permalink) Old 11-20-2010, 01:46 PM
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OK, it's been so long that I've dealt with a 3 speed that I couldn't remember......thanks. CARRY ON! lol
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post #13 of 13 (permalink) Old 11-20-2010, 05:32 PM
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Quote:
Originally Posted by maverick532 View Post
You state that it stops leaking once turned off ? I've had a simiular problem with a different trans it turned out that the converter was leaking where the two halves are welded together. Your leak could also be from the front pump seal,gasket,or oring, or even a pump bolt if not torqed to spec. Hope this gives you some direction good luck.
He stated it starts leaking when it is shut off which leads me to believe it is a VB problem or pump relief.

Eric Millard
bigblok86gt@yahoo.com

528ci of N/A power

Circle R Racing Engines

Trick Chassis
Beloit,WI 53511
608-313-9197

http://www.trickchassis.com/

"LOL, WE DONT RACE DYNOS" Quoted for the truth!
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