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transmission leak


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heinz57
User

May 31, 2010, 2:01 PM

Post #1 of 13 (2978 views)
transmission leak Sign In

Have 1981 ford Ford F-350 4.9 6 clyinder, old Budget van. Transmission is leaking where filler tube inserts to transmission case. The tube has an "o" ring near the end but there is a rubber grommet that sits in the transmission where the filler tube inserts. I have searched for but cannot this grommet. Quite sure this is C-4 tranny. None of the 4 local parts stores carry any thing that fits. Anyone have an ideas, suggestions where to look??


Hammer Time
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May 31, 2010, 2:04 PM

Post #2 of 13 (2970 views)
Re: transmission leak Sign In

Why would you say there is a rubber grommet? They never seal rubber against rubber. Every one I have ever seen had an Oring in the tube inserted into a machined round hole.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Sidom
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May 31, 2010, 2:24 PM

Post #3 of 13 (2967 views)
Re: transmission leak Sign In

I'm with HT on this one.....I've seen both styles you are talking about but never both on the same tube....

Sounds like someone may have been trying to "rig" something up to fix a leak....


heinz57
User

May 31, 2010, 2:58 PM

Post #4 of 13 (2962 views)
Re: transmission leak Sign In

A couple months ago I had to replace the flexplate. when I put tranny back in I swear there was a grommet in the case that simply fell to pieces when I replaced the filler tube and it has been leaking ever since. What I may have seen was dirt and grim build up, but I thought there were bits of rubber in. In searching for a replacement I found many grommets for tranny filler tubes but none for the C-4 and 4.9 combo. So the "O" ring, although it still looks good must be bad. Thanks for clearing that up. Had never dropped a tranny before so I did not know what to look for.


Tom Greenleaf
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Jun 2, 2010, 5:40 AM

Post #5 of 13 (2946 views)
Re: transmission leak Sign In


Metal of tube is bolted or may use a wrap like a wire loom holder. Gasket/grommet
is tight into trans but not meant to be the support
for the tube.

Surprised they used the C-4 instead of a C-6 on a F-350 but that's what showed.

Difference would be 11 or 17 bolt pan respectively,

T



Hammer Time
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Jun 2, 2010, 9:32 AM

Post #6 of 13 (2940 views)
Re: transmission leak Sign In

That setup wouldn't have an O-ring though. It has to be a rubber against metal seal.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
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Jun 2, 2010, 9:46 AM

Post #7 of 13 (2937 views)
Re: transmission leak Sign In

Right - no "O" ring used. That type plug is or should be like barbed rubber and stay in trans if you pulled the tube out for whatever reason. If no good to seal it must be part of a rebuild kit or a Ford only part as I couldn't find it separately. Bet a real trans shop would have stuff like that.

Might find stuff like that at a Hot Rod parts site like those who want chrome everything and could expect that rubber to give up playing around with it too much if old,

T



heinz57
User

Jun 7, 2010, 8:35 AM

Post #8 of 13 (2924 views)
Re: transmission leak Sign In

Thanks for the replies. This must be an odd one because the filler tube does have an "O" ring on the end, even an indent to hold it inplace. The tube inserts quite a way into the case, inch, inch and a half so the "O" ring goes past the grommet. Why it has both I have no idea. I picked up what NAPA told me was a universal grommet for the C-4, C-5. It went into the case fine but was too thick to get the tube in. Then I tried putting it on the tube first and then inserting and it pushed the grommet up on the tube. I will try local transmission shops. Appreciate your input.


Hammer Time
Ultimate Carjunky / Moderator
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Jun 7, 2010, 9:30 AM

Post #9 of 13 (2918 views)
Re: transmission leak Sign In

I would suspect someone may have swapped the tube at an earlier time. They just do not seal rubber against rubber because it doesn't work.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Jun 7, 2010, 12:09 PM

Post #10 of 13 (2908 views)
Re: transmission leak Sign In

IMO this is too important to ignore

Whatever it takes get the right dipstick and tube for this,

T



heinz57
User

Jun 8, 2010, 9:25 AM

Post #11 of 13 (2890 views)
Re: transmission leak Sign In

Probably best to just replace the filler tube providing it comes with the seal. This truck does 17 bolt pan so I assume this is a C6 and not a C4 tranny?


Tom Greenleaf
Ultimate Carjunky / Moderator
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Jun 8, 2010, 4:55 PM

Post #12 of 13 (2881 views)
Re: transmission leak Sign In


Pan gasket for C-6 should look like this above.

Get the dang tube and whatever seal it used. When I Googled it they were available in chrome or brass to "dress us" the thing. Not necessary but could be a way??

C-6 if it has that was the OMG best trans ever made by anyone! Ok a plug for FORD from me....



T



heinz57
User

Jun 9, 2010, 8:44 AM

Post #13 of 13 (2864 views)
Re: transmission leak Sign In

Okay and thanks for your help.






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