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Leaky Transmission
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   Forward Look Technical Discussions -> Transmission and Rear AxleMessage format
 
furvedere
Posted 2024-04-07 2:03 PM (#634589)
Subject: Leaky Transmission



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Location: Rochester, NY		58 Plymouth with 64 Torqueflite. I have reason to believe there’s a heavy leak coming from above the transmission pan on driver side. I’m thinking it’s the shift linkage seal. I’ve got car up on lift to work on it. Going to drop what oil is left in it. Is changing that seal difficult? Any advice appreciated. Thank you, Bob
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56D500boy
Posted 2024-04-07 2:27 PM (#634591 - in reply to #634589)
Subject: RE: Leaky Transmission



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Location: Lower Mainland BC		.
I don't know much about 727 torqueflites but I think that a leak on the left (driver's) side can happen at four possible points:

1. At the neutral safety switch

2. At the park cable



3. The shift cable adjusting point

4. At the shifter shaft seal



Confirm which one is the actual problem.





(727_904_NeutralSafetySwitch.jpg)



Attachments
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Attachments 727_904_NeutralSafetySwitch.jpg (34KB - 19 downloads)
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57chizler
Posted 2024-04-08 2:13 PM (#634618 - in reply to #634589)
Subject: RE: Leaky Transmission



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Location: NorCal		here is no shift "linkage" seal, the lever with linkage is the kickdown and that seal is easy to change. Remove the lever and the washer below it and pry out the seal...it's all rubber...new one pushes back in easily.

But, before digging in, spray the area with brake cleaner to remove the leakage and determine the actual source of the leak with a flashlight and mirror. As Dave noted, common leak spots are the KD shaft seal, dipstick tube, NSS, the rear band lever pivot pin, shift cable, Park cable and the cooler line fittings.
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57chizler
Posted 2024-04-08 2:25 PM (#634619 - in reply to #634618)
Subject: RE: Leaky Transmission



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Location: NorCal
If the KD seal is the leak source the part number is 2466584.



(TP Shaft Seal 2466584.jpg)



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Attachments TP Shaft Seal 2466584.jpg (30KB - 16 downloads)
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furvedere
Posted 2024-04-08 9:17 PM (#634627 - in reply to #634589)
Subject: Re: Leaky Transmission



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Posts: 295
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Location: Rochester, NY		Thanks guys. I pinpointed leak awhile ago by wrapping a rag around it must be kick down linkage I’m thinking. Will check all mentioned areas though. Sure enough it was leaking right off the rag instead of one of the pan bolts on driver side. I’ll see if I can duplicate it and take photo. Not sure if I know how to post photo here though.
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Zorc
Posted 2024-04-09 7:20 AM (#634635 - in reply to #634627)
Subject: Re: Leaky Transmission



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Posts: 94
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Location: North Germany		Hy,
i had the same problem some time before. I had problems to understand the problem , but at the end i had change the o-ring. Very easy, very clean, everything fine.
Maybe my link will help you :
http://www.forwardlook.net/forums/forums/thread-view.asp?tid=78732&...

Roger
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furvedere
Posted 2024-04-17 10:01 PM (#634741 - in reply to #634589)
Subject: Re: Leaky Transmission



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Location: Rochester, NY		So with car up on hoist, I cut a rag into long thin strips and tied them around each possible leak point. The kick down linkage is the only place it’s leaking and it’s leaking real bad. Thanks for all the tips. Think NAPA would be a good source for that little seal? I’ve got to read that last link yet…I take it the pan and fluid have to be dropped to replace.
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57chizler
Posted 2024-04-18 12:22 PM (#634754 - in reply to #634741)
Subject: Re: Leaky Transmission



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Location: NorCal
furvedere - 2024-04-17 7:01 PM
…I take it the pan and fluid have to be dropped to replace.


No, as I stated earlier, loosen the pinch bolt on the lever, remove the lever and the washer below it and pry out the seal...it's all rubber...new one pushes back in easily. When the old seal is removed, some fluid might run out...be prepared to catch it.
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dels56
Posted 2024-04-18 6:34 PM (#634762 - in reply to #634589)
Subject: Re: Leaky Transmission


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Here is a look at the housing with a seal in place.

Del



(IMG_8482 2.jpg)



Attachments
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Attachments IMG_8482 2.jpg (119KB - 7 downloads)
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furvedere
Posted 2024-04-23 5:48 PM (#634847 - in reply to #634589)
Subject: Re: Leaky Transmission



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Posts: 295
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Location: Rochester, NY		I appreciate all the replies and info. Thank you. I’m sure it’s the kick-down linkage shaft seal as I tied a thin rag on it and all other leak prone connections. It’s only kick down linkage seal that’s leaking. I have the part number…Thank you but can’t find it. Have called local parts stores. Where do I find 2466584 o-ring?

Edited by furvedere 2024-04-23 5:51 PM
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furvedere
Posted 2024-04-24 12:15 PM (#634862 - in reply to #634589)
Subject: Re: Leaky Transmission



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Posts: 295
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Location: Rochester, NY		https://www.classictransmissionsolutions.com/throttle-lever-shaft-ki...

Found it and just ordered it here. ?? Thanks for all your help guys. I appreciate it.

Bob
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