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Old 08-02-2003, 03:26 PM
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Leaky C4

Hello I have a slight problem I just put a new 3500 stall converter into my 69 mustang C-4. I bolted everything thing up and it worked great I drove it around for a bit and then stomped on it about 5 seconds later the entire street was filled with smoke.
I came back and tranny fluid was pouring out the bottom of the bellhousing. Now when I start my motor and leave it in park there is a solid stream of fluid pouring out. Could I have dusted the front pump seal, or I hope not even broken the front pump. Any input would be great thanks

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Old 08-02-2003, 05:06 PM
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leak on c4 trans

take trans out and check tork hub for wear and pump bushing failure. If no wear is found check converter for leak in welds, replace pump bushing, seal and pump gasket and if pump is a 69 replace o-ring as well. later year c4 pump body didnt use an o- ring on pump only a gasket.Make sure you have engine dowel pins in the block gotta keep every thing in line or bushing will wear out on one side.
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Old 08-02-2003, 06:14 PM
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Sounds like the converter was not completely seated, the aftermarket converters are a little tight to get in and this is what can happen. Usually I rotate the engine with the trans and converter bolted up and applying pressure with the bolts slightly, if the bolts were tight on the bell housing when you torqued them then you can guarantee this is what happened.

I try to make sure the bolts for the bellhousing are seated with finger pressure and the trans is fitting flush and the engine rotates normally before I can say the converter is seated properly. Likely you just blew the front seal.
“She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself.”

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Old 08-03-2003, 11:18 AM
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I am trying to remember for sure. It is pouring down rain right now, so I don't want to go to the garage to check. I think the bell housing on the C-4 actually mounts to the front pump and then the case. The leak is most likely from the front pump seal or convertor. On fords, you have to watch how the convertor bolts to the flex plate/flywheel. Most of the convertors had a drain plug or 2 that have to be lined up with the holes in the flywheel. They will bolt up wrong, forcing the convertor to be crooked. This will wipe out the bushing and seal in the pump. There is also a chance that the plug came out of the convertor. I have seen that happen before, when the plug wasn't tight before the convertor was installed.
Like someone said, the convertor should wiggle with the nuts off. If not, it is not installed correctly. I would check for the plugs first, as that is the easiest, then remove the nuts and check that before pulling it out.

Good Luck

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