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heinz57
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May 31, 2010, 2:01 PM
Post #1 of 13
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transmission leak
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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??
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Hammer Time
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May 31, 2010, 2:04 PM
Post #2 of 13
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Re: transmission leak
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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. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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.
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Sidom
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May 31, 2010, 2:24 PM
Post #3 of 13
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Re: transmission leak
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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....
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heinz57
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May 31, 2010, 2:58 PM
Post #4 of 13
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Re: transmission leak
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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.
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Tom Greenleaf
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Jun 2, 2010, 5:40 AM
Post #5 of 13
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Re: transmission leak
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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
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Hammer Time
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Jun 2, 2010, 9:32 AM
Post #6 of 13
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Re: transmission leak
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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.
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Tom Greenleaf
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Jun 2, 2010, 9:46 AM
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Re: transmission leak
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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
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heinz57
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Jun 7, 2010, 8:35 AM
Post #8 of 13
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Re: transmission leak
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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.
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Hammer Time
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Jun 7, 2010, 9:30 AM
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Re: transmission leak
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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.
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Tom Greenleaf
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Jun 7, 2010, 12:09 PM
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Re: transmission leak
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IMO this is too important to ignore Whatever it takes get the right dipstick and tube for this, T
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heinz57
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Jun 8, 2010, 9:25 AM
Post #11 of 13
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Re: transmission leak
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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?
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Tom Greenleaf
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Jun 8, 2010, 4:55 PM
Post #12 of 13
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Re: transmission leak
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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
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heinz57
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Jun 9, 2010, 8:44 AM
Post #13 of 13
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Re: transmission leak
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Okay and thanks for your help.
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