C-4 leaking at servo

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Mar 8, 2016 | 03:15 PM

benbuilder

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C-4 leaking at servo

I am back asking questions again. 1977 302 with a c-4 auto. I bought it as a basket case. Last week I was able to get the engine running with the rebuilt carb.

Today I wanted to test drive so I started filling the transmission with the engine running. It was taking the fluid fine and then all of the sudden a large amount of fluid started draining out of the servo area on the passenger side.

I have checked and rechecked to be sure it is not the cooler lines or the dipstick. I am sure It is the servo gasket.

Is this normal for a truck that was sitting? I don't want to get over my head. I took apart a parts transmission I have to see what is going on in there and I am comfortable replacing the gasket.

Should I replace more than this gasket? I have called three local parts stores and none of them have this gasket. I am not done searching as i am sure once I go on line I will find it.

Any thoughts on this?

Thanks

Last edited by benbuilder; Mar 8, 2016 at 03:25 PM. Reason: left out word

Mar 8, 2016 | 03:49 PM

GLR

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From: NY and VA

I think the vent is above that area. Are you sure it's not coming from there?

Mar 8, 2016 | 03:52 PM

benbuilder

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I read something about the vent. I will look into that now. Thanks

Mar 8, 2016 | 04:46 PM

benbuilder

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I looked at my transmission and on the internet. I am fairly sure mine does not have a vent

Mar 8, 2016 | 04:52 PM

GLR

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From: NY and VA

They all have a vent. Or should have. Some are on the tailshaft, some like
https://www.google.com/search?q=c4+f...Ldvt4SFBzjM%3A

Isn't a cooler line above that servo cover?
Tail shaft vent
https://www.google.com/search?q=c4+f...aau64ny3uNM%3A

Mar 8, 2016 | 05:16 PM

GLR

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Joined: Sep 2003

Posts: 53,968

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From: NY and VA

TCI Automatic Transmission Servo Sealing Rings 523007 - Free Shipping on Orders Over $99 at Summit Racing
http://www.ebay.com/itm/like/331385855320?lpid=82&chn=ps&ul_noapp=true

Mar 8, 2016 | 05:49 PM

benbuilder

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Yes thanks, my vent is in the tail not as shown in other pictures above the servo. I guess I will order the gasket and replace it.

Is this an odd situation? I did a search on this site and found no other posts regarding this issue

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Mar 10, 2016 | 05:55 PM

benbuilder

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I ordered the servo gasket. I am waiting for it to come in. I also picked up a new filter and gasket. I took off the pan and drained all the fluid, I removed the filter knowing that there is a spring and a small metal valve or sleeve of some sort under the filter. I had a bucket under the valve body which caught the spring but I cannot find the metal piece. I am working in a clean garage floor. I have searched everywhere. I began to doubt if the meat part was used. I went to a parts c-4 tranny I have, and took it apart. I found both pieces, the spring and the sleeve. so I know it is required. I have never driven this truck, but is it possible that the spring was installed but not the metal sleeve and someone drove the truck?