C4 leak when parked - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
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post #1 of 8 (permalink) Old 05-07-2007, 01:00 PM Thread Starter
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C4 leak when parked

When my '66 mustang sits for any amount of time, week or so, the tranny leaks a large quantity of fluid, qtr cup or more. The tranny runs great, doesn't leak when it's running; bottom of car is completely clean.

I've heard C4's are known for the converter draining back into the case, resulting in fluid coming out the vent tube.
This appears to be my problem. Simple fix? Any other idea's out there? Second, what was that black light trick I read earlier? Normally an additive is necessary, but there wasn't any comment regarding an additive. Can this be done with just the black light?

Thanks much



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post #2 of 8 (permalink) Old 05-07-2007, 07:39 PM
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C4 leak when parked

Yes, converter leakback is fairly common. Quick fix? None that I know of. I remedied the same problem by fitting an external tank (small). Its kind of hokey but it works. To avoid being ridiculed on line, I'll PM you with the details if you are interested and grant permission. Best regards. John--Las Vegas.
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post #3 of 8 (permalink) Old 05-07-2007, 08:26 PM
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C4 leak when parked

Quote:
On 2007-05-07 19:39, Juan wrote:
Yes, converter leakback is fairly common. Quick fix? None that I know of. I remedied the same problem by fitting an external tank (small). Its kind of hokey but it works. To avoid being ridiculed on line, I'll PM you with the details if you are interested and grant permission. Best regards. John--Las Vegas.
Hokey? Trans overflow tanks are now required on all Top Sportsman cars. See one here for a glide:
http://nasa.racingjunk.com/post/8807...flow-tank.html






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post #4 of 8 (permalink) Old 05-07-2007, 09:11 PM
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C4 leak when parked

Yep i use a overflow tank/catch can also.. On the leak issue sure it is not coming from the kickdown seal area.That is fairly common also with drainback.
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post #5 of 8 (permalink) Old 05-07-2007, 09:27 PM
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C4 leak when parked

on the chevys from factory on trucks there was a recall that had the same problem and the fix was to put a long hose from the breather zip tied up in the air to the dip stick tube

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post #6 of 8 (permalink) Old 05-07-2007, 09:48 PM Thread Starter
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C4 leak when parked

Great input. The breather tube is simply a 5/16 line, i was thinking about cutting/bending a new higher line to resolve the problem. A catch can is a great idea.

Any of you know about the black light trick? do i need an fluid additive or is the simply a visual with the light?
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post #7 of 8 (permalink) Old 05-07-2007, 09:50 PM
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C4 leak when parked

there is usually a additive involved

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post #8 of 8 (permalink) Old 05-07-2007, 09:59 PM
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C4 leak when parked

ATF will flouresce without an additive. So will engine oil. The dyes are used to diferentiate one kind of oil from another. Done this many times without additive.
As to preventing the drain back from the converter; isn't there a converter check valve (anti-drainback) in the pump?
Paul

<font size=-1>[ This Message was edited by: PaulS1950 on 5/8/07 1:04pm ]</font>
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