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Author Topic: Unidentifiable Leak  (Read 6398 times)

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Offline ammachine390

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Unidentifiable Leak
« on: August 10, 2011, 02:01:39 PM »
The Concord has not been started or driven in more than a week, and when we came home from vacation, there was a puddle of trans fluid under it. When I was driving it everyday, it did not drip. However, this has happened before, so I doubt it's a new leak. When I had the car in the shop for a few weeks, it was leaking pretty badly, brought it home and started driving it, and no leaks.  So it only leaks after the car has not been driven for a while. Any ideas? Thanks.
« Last Edit: August 10, 2011, 02:03:56 PM by ammachine390 »
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Dan
1981 AMC Concord DL 258 Auto

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Offline mudkicker715

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Re: Unidentifiable Leak
« Reply #1 on: August 10, 2011, 02:05:46 PM »
Torque convertor is unloading. I had that problem on one of mine when it sat. Not sure of the cause however.
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Manitowoc WI

Offline ammachine390

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Re: Unidentifiable Leak
« Reply #2 on: August 11, 2011, 09:36:20 PM »
Is replacement of the torque converter the only way to fix the problem? Did you replace yours?
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Dan
1981 AMC Concord DL 258 Auto

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Offline rollguy

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Re: Unidentifiable Leak
« Reply #3 on: August 11, 2011, 11:56:00 PM »
Try Lucas transmission additive.  It is very thick, so you will need to put it in the sun before squeezing it down the dipstick tube.  It works wonders for things like this. 
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Offline mudkicker715

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Re: Unidentifiable Leak
« Reply #4 on: August 12, 2011, 01:01:09 AM »
Not sure what fixed it. Other than it is now a manual trans.

Sorry gotta disagree with rollguy. There is no pixie dust in a bottle that ever hides the real problem.
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Offline ammachine390

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Re: Unidentifiable Leak
« Reply #5 on: August 12, 2011, 02:09:27 AM »
Well I guess I should convert to a manual too, now that I have a reason too.  ::)

I have used the Lucas before to stop a different trans leak, that was later fixed, and it did not work. I have to agree mudkicker, there is no magic in a bottle, only band-aide in a bottle.
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Dan
1981 AMC Concord DL 258 Auto

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Offline rollguy

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Re: Unidentifiable Leak
« Reply #6 on: August 12, 2011, 12:16:43 PM »
Quote from: ammachine390 on August 12, 2011, 02:09:27 AM
Well I guess I should convert to a manual too, now that I have a reason too.  ::)

I have used the Lucas before to stop a different trans leak, that was later fixed, and it did not work. I have to agree mudkicker, there is no magic in a bottle, only band-aide in a bottle.

I have had luck with Lucas products.  I guess I would rather try a band-aide, then to keep bleeding!
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1980 Eagle Turbodiesel Wagon (only 2 known to exist as of 2008)- 7-7-2011 Flight to it's new nest @ Rambler Ranch
1983 Eagle Wagon  Tan over Copper
1982 Eagle SX4 "ALTREGL"  (avatar photo)
1982 Eagle 4 Door Sedan  Copper over Satin Black
1985 Eagle Sport Wagon October 2007 ROTM (SOLD)
4 Biofuel powered Benzs ('98 E300, '82 300 CD, '82 300 TD (wagon), '80 240 D)
1983 GMC Van (6.2 Diesel)
1985 Mitsubishi pickup (2.3 Turbodiesel)

Offline vangremlin

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Re: Unidentifiable Leak
« Reply #7 on: August 12, 2011, 11:45:00 PM »
Quote from: rollguy on August 12, 2011, 12:16:43 PM

I have had luck with Lucas products.  I guess I would rather try a band-aide, then to keep bleeding!

I agree, its like chicken soup - it can't hurt (other than a few bucks to buy the product).
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Offline ammachine390

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Re: Unidentifiable Leak
« Reply #8 on: August 13, 2011, 12:11:07 AM »
I thought products advertised to "stop leak" made gaskets swell, which can just cause other problems elsewhere further down the road.
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Dan
1981 AMC Concord DL 258 Auto

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Offline 85AmCfreak

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Re: Unidentifiable Leak
« Reply #9 on: August 13, 2011, 12:40:23 AM »
I have used Lucas in my 81 ford and was satisfied with the product, it gave me enough time to save the money to rebuild the trans. That being said you can't pour the stuff in and expect Miracles.
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Offline mudkicker715

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Re: Unidentifiable Leak
« Reply #10 on: August 13, 2011, 01:00:34 AM »
Seeing that this a concord where is it coming out. On an eagle nothing will stop from coming out. On a concord maybe its an easy fix with a gasket.
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Offline ammachine390

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Re: Unidentifiable Leak
« Reply #11 on: August 13, 2011, 02:51:57 AM »
Quote from: mudkicker715 on August 13, 2011, 01:00:34 AM
Seeing that this a concord where is it coming out. On an eagle nothing will stop from coming out. On a concord maybe its an easy fix with a gasket.

Why would it be so different from an eagle?

The last I saw it, it looked as if it was coming out of the pan, however, the pan gasket was replaced last November, and I retightened it a few weeks ago. But I don't think it can be the pan gasket as it doesn't ever leak if I drive it everyday, only leaks after sitting a few days.
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Dan
1981 AMC Concord DL 258 Auto

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Offline mudkicker715

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Re: Unidentifiable Leak
« Reply #12 on: August 13, 2011, 03:27:10 AM »
My eagle leaked at the point where it touched the transfer case. Thats one heck of a big gasket area to secure. Which should nEver have to do anything other than keep moisture out. Meaning if you had no gasket there at all it would never normally leak out. As the fluid never goes in there. A concord is more sealed up.
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Manitowoc WI
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