65 C4 Transmission question

Woody3882

Member
Jun 19, 2018
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Bradenton Fl 34212
I have a 1965 fully restored Mustang with an automatic C4 transmission. The trans is original but rebuilt with only 2k on it. The car has been parked in the garage for the last month with no problems or leaks, (I faithfully check underneath for leaks). Today I found a steady drip of transmission fluid. I did the usual inspection to find that it is coming from a tube that is at the top drivers side of the transmission. it is a very tight spot to get to but I barely got the camera to to it. If you look at the picture you can see a drop ready to fall. Can anyone shed some light on what my problem is. I really do not want to pull the trans if I don't have to. If you would please look at the pictures and view the small tube dripping, it is circled in red. I would appreciate any help one can give.
Thanks I appreciate it
Dana Wood
[email protected]
 

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rgsauger

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Aug 8, 2018
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Houston
The only places on a C4 that can leak over there are the shift shaft seals to the best of my knowledge. You have a shift shaft seal and a throttle shaft seal. Not bad to change. Got to pull the pan and valve body and go up from the bottom. Look it up in YouTube
 

Woody3882

Member
Jun 19, 2018
43
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Bradenton Fl 34212
Turns out that the C-4 has a fluid overflow on the top. out of the overflow is a 1/4 "" piece of tubing that runs along the drivers side of the transmission. when the overflow drips it runs down the casing and along the pan gasket so it is hard to figure where the leak is coming from. The weirdest part is, the car was sitting for months with no problems and then one day it just started, It puked out about a cup of trans fluid and just stopped and hasn't leaked since..
 

2Blue2

will be trying this sex one when I can find it
Mar 5, 2019
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Just had to burp?
Who knows , cars are funny sometimes.
 

GOvert

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Jan 27, 2007
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north central Tennessee Valley
Once I had one (a C-4) that would do that after sitting for a month or so and the best that I could figure is the torque converter lost its suction? and would unload into the trans causing the fluid to come out of the overflow tube. If I ran it every week, it would not do that.
 
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