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Re: 727 input shaft seal leaking on a fresh rebuild.
[Re: MoparforLife]
#801064
09/14/10 10:39 AM
09/14/10 10:39 AM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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vent hole is there above the input shaft also,just check and make sure its not over filled when my 727 was over filled and ran real hard it would spit it out the vent was it a good seal,I have gotten were I wount use the cheap seals,I go to the dealer and get a mopar seal for that spot for sure drop the xfer off the back of it first would be they way to go your right,no fun at all on a 4x4,at least you dont have to jack it up as high  with greese or dip in atf,just so its not dry on start up  good luck pat 
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Re: 727 input shaft seal leaking on a fresh rebuild.
[Re: buildanother]
#801066
09/14/10 11:43 AM
09/14/10 11:43 AM
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Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem
master
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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Quote:
Agreed on making sure trans is not overfilled. [/quote
]
the fluid expands quite a bit hot!
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Re: 727 input shaft seal leaking on a fresh rebuild.
[Re: Pat_Whalen]
#801069
09/14/10 04:51 PM
09/14/10 04:51 PM
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Joined: Jan 2003
Posts: 25,801
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,801
Rio Linda, CA
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Are you saying that the fluid only drips from the bell when sitting shut off or is this just the only time you've looked?
The INTERNET, the MISinformation superhighway
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Re: 727 input shaft seal leaking on a fresh rebuild.
[Re: Pat_Whalen]
#801071
09/14/10 05:04 PM
09/14/10 05:04 PM
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Joined: Jan 2003
Posts: 8,940
Holly/MI
Dean_Kuzluzski
master
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master
Joined: Jan 2003
Posts: 8,940
Holly/MI
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Did you change the bushing that supports the converter snout?
Edit: I think they call that the pump drive bushing? Is there a new one?
Last edited by Dean_Kuzluzski; 09/14/10 05:05 PM.
R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04
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Re: 727 input shaft seal leaking on a fresh rebuild.
[Re: MoparforLife]
#801075
09/14/10 08:20 PM
09/14/10 08:20 PM
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Pat_Whalen
OP
super gas
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OP
super gas
Joined: Aug 2003
Posts: 4,481
Mesa, AZ
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Quote:
Did you put a coating of grease on the seal where the converter rides. It is not all that common but you know s*** happens. Big thing is it works right.
No kidding. I was very surprised/happy when it actually shifted properly and doesn't appear to have any other major defects.
If memory serves me correctly, I did cover the seal in ATF, not grease. Should it have been grease? If so, what kind?
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Re: 727 input shaft seal leaking on a fresh rebuild.
[Re: scratchnfotraction]
#801076
09/14/10 08:21 PM
09/14/10 08:21 PM
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Pat_Whalen
OP
super gas
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OP
super gas
Joined: Aug 2003
Posts: 4,481
Mesa, AZ
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Quote:
vent hole is there above the input shaft also,just check and make sure its not over filled
when my 727 was over filled and ran real hard it would spit it out the vent
was it a good seal,I have gotten were I wount use the cheap seals,I go to the dealer and get a mopar seal for that spot for sure
drop the xfer off the back of it first would be they way to go
your right,no fun at all on a 4x4,at least you dont have to jack it up as high
with greese or dip in atf,just so its not dry on start up
good luck pat
Mike,
I relocated my vent hole to the top of the case and plugged the old vent hole location. I wish it were that easy.
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Re: 727 input shaft seal leaking on a fresh rebuild.
[Re: 6pkaar]
#801077
09/14/10 08:22 PM
09/14/10 08:22 PM
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Pat_Whalen
OP
super gas
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OP
super gas
Joined: Aug 2003
Posts: 4,481
Mesa, AZ
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Quote:
Did you have the converter hanging on the input shaft since the tranny was rebuilt? I've heard the weight of it can distort the shape of the seal, then when it's installed the seal will leak.
Negative, converter only went on when the trans was ready to be installed. I heard about this and made a point not to do that.
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Re: 727 input shaft seal leaking on a fresh rebuild.
[Re: John_Kunkel]
#801078
09/14/10 08:24 PM
09/14/10 08:24 PM
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Pat_Whalen
OP
super gas
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OP
super gas
Joined: Aug 2003
Posts: 4,481
Mesa, AZ
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Quote:
Are you saying that the fluid only drips from the bell when sitting shut off or is this just the only time you've looked?
If I wipe the bell clean and let it sit, no dripping.
If I start it and run it in the driveway in park, a small "stream" will form on the underside of the bell but not drip (this may be fluid left over from inside of the bell since I typically park uphill.
If I park it in the driveway after driving it and getting it up to temperature, that is when five-10 drips will appear on the ground directly under the bell, and then a small "almost drop" will form, hanging there, taunting me. Until I wipe it away and repeat the cycle.
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Re: 727 input shaft seal leaking on a fresh rebuild.
[Re: dOrk !]
#801079
09/14/10 08:25 PM
09/14/10 08:25 PM
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Pat_Whalen
OP
super gas
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OP
super gas
Joined: Aug 2003
Posts: 4,481
Mesa, AZ
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Quote:
Take the dust-cover off and point the vehicle down-hill slightly and see if there is a leak then.
No dust cover installed yet.
I'll try parking it downhill today after I take it for a ride.
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Re: 727 input shaft seal leaking on a fresh rebuild.
[Re: Dean_Kuzluzski]
#801080
09/14/10 08:26 PM
09/14/10 08:26 PM
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Pat_Whalen
OP
super gas
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OP
super gas
Joined: Aug 2003
Posts: 4,481
Mesa, AZ
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Quote:
Did you change the bushing that supports the converter snout?
Edit: I think they call that the pump drive bushing? Is there a new one?
Yes, the pump drive bushing was changed.
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Re: 727 input shaft seal leaking on a fresh rebuild.
[Re: challengermike]
#801081
09/14/10 08:28 PM
09/14/10 08:28 PM
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Joined: Aug 2003
Posts: 4,481
Mesa, AZ
Pat_Whalen
OP
super gas
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OP
super gas
Joined: Aug 2003
Posts: 4,481
Mesa, AZ
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Quote:
did you fill it in neutral,they dont pump in park.
I don't want to say one way or the other. I don't recall filling it in neutral, but I do remember checking it properly after driving it around, letting it sit, put in neutral on level ground and it was full.
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