Re: 727 Transmission Problems
[Re: DodgeCharger]
#2062368
04/26/16 11:44 PM
04/26/16 11:44 PM
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Joined: Jul 2004
Posts: 19,317 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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Sound like it wasn't serviced cos the fluid doesn't just look like motor oil overnight............
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: 727 Transmission Problems
[Re: dvw]
#2062497
04/27/16 03:00 AM
04/27/16 03:00 AM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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The rear clutch is toast. It's the only component applied in all forward gears. Doug Yep no forward with the rear clutch gone. I take it you tried manual low also ? Ron
Last edited by 383man; 04/27/16 03:01 AM.
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Re: 727 Transmission Problems
[Re: DodgeCharger]
#2062540
04/27/16 08:26 AM
04/27/16 08:26 AM
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Joined: Mar 2006
Posts: 9,835 MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,835
MI, usa
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What would cause the rear clutch to fail? Maybe a seal left loose? Cut or worn piston seal in the rear clutch, seal rings broken or worn on the input shaft, broken diaphragm spring in the rear clutch are the 3 most likely possibility's. Doug
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Re: 727 Transmission Problems
[Re: DodgeCharger]
#2062549
04/27/16 09:08 AM
04/27/16 09:08 AM
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Joined: Nov 2010
Posts: 3,696 jersey
Spaceman Spiff
master
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master
Joined: Nov 2010
Posts: 3,696
jersey
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When I tore the splines out of the front planetary, I had no forward gears, but reverse still worked. Of course it was under full throttle, 1-2 shift, and made a loud bang when it happened
526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!
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Re: 727 Transmission Problems
[Re: DodgeCharger]
#2062788
04/27/16 04:48 PM
04/27/16 04:48 PM
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Joined: Jan 2003
Posts: 25,785 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,785
Rio Linda, CA
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What would cause the rear clutch to fail? Maybe a seal left loose? Performance valve bodies raise the line pressure which puts extra strain on the rear clutch Belleville spring....not uncommon to see one fail shortly after overhaul since the seals are fresh and deliver full pressure to the spring. The one on the right is more susceptible to failure due to the long internal "fingers".
The INTERNET, the MISinformation superhighway
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Re: 727 Transmission Problems
[Re: John_Kunkel]
#2063239
04/28/16 09:56 AM
04/28/16 09:56 AM
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Joined: Sep 2003
Posts: 19,388 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,388
north of coder
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What would cause the rear clutch to fail? Maybe a seal left loose? Performance valve bodies raise the line pressure which puts extra strain on the rear clutch Belleville spring....not uncommon to see one fail shortly after overhaul since the seals are fresh and deliver full pressure to the spring. The one on the right is more susceptible to failure due to the long internal "fingers". should this part be replaced as a precaution ? i'm guessing there is no method to check other than a good visual inspection for cracks and to see the if the "fingers" are all the same heights.
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Re: 727 Transmission Problems
[Re: 440Jim]
#2065897
05/02/16 02:01 PM
05/02/16 02:01 PM
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Joined: Dec 2004
Posts: 2,703 Mohnton, Pa
DodgeCharger
OP
master
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OP
master
Joined: Dec 2004
Posts: 2,703
Mohnton, Pa
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The seal was all torn up and no clutch material left on clutches. Explain the Bellevue spring. His transmission going by the case number looks to be a 1977. Wich Bellevue spring should he have? Looks like it should be improved?If it is the wrong one would it take out the seals? Thanks,
Last edited by DodgeCharger; 05/02/16 02:04 PM.
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Re: 727 Transmission Problems
[Re: DodgeCharger]
#2065997
05/02/16 04:32 PM
05/02/16 04:32 PM
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Joined: Jan 2003
Posts: 25,785 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,785
Rio Linda, CA
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The piston casting numbers that Jim posted will tell you which piston goes with which spring. Even if the parts match is correct there's no way to tell if the spring is good. New is cheap insurance as is minimal clutch plate clearance.
The INTERNET, the MISinformation superhighway
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Re: 727 Transmission Problems
[Re: John_Kunkel]
#2066074
05/02/16 06:44 PM
05/02/16 06:44 PM
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Joined: Mar 2006
Posts: 9,835 MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,835
MI, usa
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The piston casting numbers that Jim posted will tell you which piston goes with which spring. Even if the parts match is correct there's no way to tell if the spring is good. New is cheap insurance as is minimal clutch plate clearance.
John how tight can you run? Tighter than .025" Doug
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Re: 727 Transmission Problems
[Re: dvw]
#2066089
05/02/16 07:07 PM
05/02/16 07:07 PM
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Joined: Jan 2003
Posts: 25,785 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,785
Rio Linda, CA
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You could probably get away with that but expect some creeping in Neutral.
The INTERNET, the MISinformation superhighway
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