727 Torqueflight low reverse shaft o'ring
#2631998
03/12/19 06:05 PM
03/12/19 06:05 PM
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Joined: Nov 2009
Posts: 252
Seattle, WA.
edp
OP
enthusiast
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OP
enthusiast
Joined: Nov 2009
Posts: 252
Seattle, WA.
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Hi all,
I believe the o-ring on the low/reverse shaft in my 727 is leaking. this is a 74 trans in my 71 GTX clone. Leak seems to be coming out of the shaft hole in the housing above the pan, at first thought it was typical pan gasket issue but not the case. Wasted time messing around with that instead of diagnosing the leak clearly.
Im wondering if one can turn the rear tailshaft housing and not have to remove it complete so the retainer tab of the housing clears the hole so the pin can slide back and also if once pan is off one can "reach around" the valve body to push on the pin inside the case to get it to slide out the rear hole to replace the o-ring (s).
I've never done this and haven't pulled a valve body off a trans in 30 yr's so Im looking for clear input and experience here! I've found some threads addressing this but nothing that clearly says its doable like Im thinking. I love the ones that say "just break the housing tab" for clearance.....
thanks all!
Evan
Last edited by edp; 03/12/19 06:06 PM.
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Re: 727 Torqueflight low reverse shaft o'ring
[Re: edp]
#2632005
03/12/19 06:20 PM
03/12/19 06:20 PM
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Joined: Jun 2003
Posts: 21,428
It's a dry heat
gtx6970
Too Many Posts
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Too Many Posts
Joined: Jun 2003
Posts: 21,428
It's a dry heat
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Hi all,
I believe the o-ring on the low/reverse shaft in my 727 is leaking. this is a 74 trans in my 71 GTX clone. Leak seems to be coming out of the shaft hole in the housing above the pan, at first thought it was typical pan gasket issue but not the case. Wasted time messing around with that instead of diagnosing the leak clearly.
Im wondering if one can turn the rear tailshaft housing and not have to remove it complete so the retainer tab of the housing clears the hole so the pin can slide back and also if once pan is off one can "reach around" the valve body to push on the pin inside the case to get it to slide out the rear hole to replace the o-ring (s).
I've never done this and haven't pulled a valve body off a trans in 30 yr's so Im looking for clear input and experience here! I've found some threads addressing this but nothing that clearly says its doable like Im thinking. I love the ones that say "just break the housing tab" for clearance.....
thanks all!
Evan
I've done it, numerous times on later models with the OD unit, but I dont see why it cant be done with a simple 72 - 904 trans
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Re: 727 Torqueflight low reverse shaft o'ring
[Re: edp]
#2632266
03/13/19 12:29 PM
03/13/19 12:29 PM
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Joined: Jan 2003
Posts: 25,791
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,791
Rio Linda, CA
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Im wondering if one can turn the rear tailshaft housing and not have to remove it complete
No, the park rod extends into the tailhousing and will prevent it from turning. As suggested, clean the end of the shaft and seal it with RTV. Works best if the fluid level is drained to below the shaft.
The INTERNET, the MISinformation superhighway
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Re: 727 Torqueflight low reverse shaft o'ring
[Re: John_Kunkel]
#2632304
03/13/19 01:57 PM
03/13/19 01:57 PM
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Joined: Nov 2009
Posts: 252
Seattle, WA.
edp
OP
enthusiast
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OP
enthusiast
Joined: Nov 2009
Posts: 252
Seattle, WA.
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OK, thanks for the tips. MY old high school teacher / Mopar racer friend, - from Wikipedia below: ![[Linked Image]](https://upload.wikimedia.org/wikipedia/commons/5/55/Al_Young_with_Championship_Dodge_Challenger_Drag_Car_at_MOHAI.jpg) who lives up the street from me suggested possible tailshaft housing gasket as well as shaft o-ring and the fixes are: 1) slight tap - veeery light - (.060ish) on the shaft to re-seat o-ring 2) tap, clean and RTV hole plus remove tailshaft housing and new gasket there too - DONT break tang off as some fixes show being done 3) pull trans and reseal shaft on bench will try the first two and see how it goes. I wonder if you can get behind the inside end of the shaft & push it out the hole w/o removing valve body. I also dont know if that'll make the low band "fall apart" & then not be able to reassemble - dont want to go down that road.
Last edited by edp; 03/13/19 02:11 PM.
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Re: 727 Torqueflight low reverse shaft o'ring
[Re: edp]
#2632386
03/13/19 06:37 PM
03/13/19 06:37 PM
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Joined: Feb 2003
Posts: 2,810
Sobieski Wi
bee1971
master
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master
Joined: Feb 2003
Posts: 2,810
Sobieski Wi
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If your going to remove the tail shaft housing and replace the gasket
Why wouldn’t you pull the valve body , loosen the rear band adjustment , push the pin out using your fingers on both ends as to not push it out all the way , just enough to expose the o-ring , and replace the o-ring ?
It really isn’t that difficult to do - Even if the rear band strut came loose or fell out , you can pop it back in contrary to what you read on the internet
I have done a handful for myself and friends , I am no transmission expert
1971 Dodge Charger Superbee
2011 Ram Sport 1500 Quad Cab Deep Water Blue Loaded
Siberian Huskies
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