Re: 727 Leaking !!
[Re: okie]
#2049935
04/08/16 07:22 PM
04/08/16 07:22 PM
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Joined: Jan 2003
Posts: 26,522 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 26,522
Rio Linda, CA
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Try running it a little under FULL.
The INTERNET, the MISinformation superhighway
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Re: 727 Leaking !!
[Re: Andrewh]
#2050499
04/09/16 05:19 PM
04/09/16 05:19 PM
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Joined: Apr 2014
Posts: 632 Zombieland
Car Nut
mopar
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mopar
Joined: Apr 2014
Posts: 632
Zombieland
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why not replace the shifter seal then? it is a known leak point. Very easy to do too, took me less than 15mins. If you want to know how, I can post pictures.
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Re: 727 Leaking !!
[Re: okie]
#2050509
04/09/16 05:39 PM
04/09/16 05:39 PM
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Joined: Sep 2006
Posts: 3,017 Sac, CA
mopowers
master
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master
Joined: Sep 2006
Posts: 3,017
Sac, CA
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Does the shift shaft seal sit proud of the case on top? In other words, can you use something larger than the OD of the seal to install it and still have it seat in it's recess?
Last edited by mopowers; 04/09/16 08:45 PM.
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Re: 727 Leaking !!
[Re: okie]
#2050561
04/09/16 07:10 PM
04/09/16 07:10 PM
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Joined: Jan 2003
Posts: 26,522 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 26,522
Rio Linda, CA
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Every seal has been replaced except the shifter seal, have had 2 different shop work on it and it still leaks. In your OP you state the trans was "rebuilt". Anybody who rebuilds a 727 and doesn't replace EVERY seal isn't really rebuilding it. Demand that whoever did the work replace the shift shaft seal at no charge. Chances are, if they didn't replace that seal, they probably didn't replace the rear band lever pivot pin O ring either.
The INTERNET, the MISinformation superhighway
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Re: 727 Leaking !!
[Re: John_Kunkel]
#2050777
04/10/16 01:53 AM
04/10/16 01:53 AM
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Joined: Jun 2013
Posts: 1,521 Tacoma, Washington USA
Adam71Charger
pro stock
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pro stock
Joined: Jun 2013
Posts: 1,521
Tacoma, Washington USA
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Every seal has been replaced except the shifter seal, have had 2 different shop work on it and it still leaks. In your OP you state the trans was "rebuilt". Anybody who rebuilds a 727 and doesn't replace EVERY seal isn't really rebuilding it. Demand that whoever did the work replace the shift shaft seal at no charge. Chances are, if they didn't replace that seal, they probably didn't replace the rear band lever pivot pin O ring either. I will also add that the 'full' rebuild kit I got for my 727 didn't come with the shifter seal. That's probably what happened at your trans rebuild shop. Never the less, it is part of a rebuild and they should install it for you no charge
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Re: 727 Leaking !!
[Re: Andrewh]
#2050825
04/10/16 03:16 AM
04/10/16 03:16 AM
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Joined: Apr 2014
Posts: 632 Zombieland
Car Nut
mopar
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mopar
Joined: Apr 2014
Posts: 632
Zombieland
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I bought the tool for $2, now selling for $14 on eBay, eBay item number: 331806215927.
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Re: 727 Leaking !!
[Re: John_Kunkel]
#2050832
04/10/16 03:32 AM
04/10/16 03:32 AM
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Joined: Apr 2014
Posts: 632 Zombieland
Car Nut
mopar
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mopar
Joined: Apr 2014
Posts: 632
Zombieland
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In your OP you state the trans was "rebuilt". Anybody who rebuilds a 727 and doesn't replace EVERY seal isn't really rebuilding it. Demand that whoever did the work replace the shift shaft seal at no charge.
x3
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Re: 727 Leaking !!
[Re: okie]
#2051019
04/10/16 01:41 PM
04/10/16 01:41 PM
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Joined: Feb 2003
Posts: 8,761
Andrewh
master
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master
Joined: Feb 2003
Posts: 8,761
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Re: 727 Leaking !!
[Re: okie]
#2051025
04/10/16 01:52 PM
04/10/16 01:52 PM
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Joined: Dec 2010
Posts: 1,035 Missouri U.S.A.
71yelladustr
super stock
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super stock
Joined: Dec 2010
Posts: 1,035
Missouri U.S.A.
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The dipstick o ring and selector shaft seal are are common leak points. Another leak point that is commonly overlooked is the pivot pin for the L/R band lever. I have seen a lot of people "rebuild" these transmissions and not replace it. They will just remove the strut and flip the lever out of the way to take the servo out without replacing the o ring. To most it will look like the pan is leaking when fluid is actually coming out of the L/R pin hole in the rear of the case.
392 gen III hemi on E-85 727 trans Dana 60 10.02@134
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Re: 727 Leaking !!
[Re: okie]
#2051112
04/10/16 03:54 PM
04/10/16 03:54 PM
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Joined: Apr 2014
Posts: 632 Zombieland
Car Nut
mopar
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mopar
Joined: Apr 2014
Posts: 632
Zombieland
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No need to remove the transmission.
Last edited by Car Nut; 04/10/16 03:56 PM.
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