727 leak

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Topic author
SkylinePCG
Posts: 72
Joined: Tue Apr 16, 2013 11:28 am

727 leak

Post by SkylinePCG »

I have a 727 in a rig that mostly sits, and it has a slow transmission fluid leak. In the past I’ve cleaned off everything underneath with the intention of checking back later to see where it’s messy again, but the interval goes too long to be useful.

What I’m wanting to know is aside from the pan gasket, what other places can the 727 leak from?
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Yeller
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Joined: Thu Apr 01, 2021 7:54 am
Location: Rogers County Oklahoma

Re: 727 leak

Post by Yeller »

Shift lever, neutral safety/back up light switches, transfer case adapter and pump. Pump is usually easy to identify, it leaks out of the bell housing, however if it’s over full and sits for long periods it could be just coming out the vent, it’s located on the pump housing behind the torque converter. My guess would be pan or shift lever
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Topic author
SkylinePCG
Posts: 72
Joined: Tue Apr 16, 2013 11:28 am

Re: 727 leak

Post by SkylinePCG »

Excellent, thank you!

candymancan
Posts: 3652
Joined: Tue Mar 22, 2016 11:32 pm

Re: 727 leak

Post by candymancan »

Most common leak on these is the shift linkage on top of the lip drivers side. If its in a wagoneer you can pop off the seats and pull the carpet back and take the inspection plate cover off the hump and get easy access to it.

Mine when i got my Jeep was leaking gallons a day.. litterally. Youll need to drop the pan for this anyway so might as well get a filter and some dexron 3 to do a trabs fluid change
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1990 Jeep Grand Wagoneer 155k
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letank
Posts: 4010
Joined: Wed Oct 03, 2012 9:16 pm
Location: SF bay area

Re: 727 leak

Post by letank »

SkylinePCG wrote: Sun Mar 05, 2023 10:38 am I have a 727 in a rig that mostly sits, and it has a slow transmission fluid leak. In the past I’ve cleaned off everything underneath with the intention of checking back later to see where it’s messy again, but the interval goes too long to be useful.

What I’m wanting to know is aside from the pan gasket, what other places can the 727 leak from?
Mostly sit... than it is the converter draining back and the extra 2 quarts are expelled thru the vent.... same here... if driven everyday no leaks... if it sits, after 3 days it dumps some real stains....

check this link

https://www.jalopyjournal.com/forum/thr ... ak.644802/



When does it leak? I mean does it leak when it sits for a period of time or leak all the time? Mopar trannys are common to leak when they sit for a period of time because of convertor drain back, if there driven daily this usually doesn't happen. Hope maybe this sheds a little light or helps open up the beginning of getting you fixed.


of course the other reasons mentioned above are real too
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