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727 upshifts, what to do next?? #489542
10/06/09 01:02 AM
10/06/09 01:02 AM
Joined: Jan 2004
Posts: 9,066
Eugene, Oregon
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minivan Offline OP
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minivan  Offline OP
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Joined: Jan 2004
Posts: 9,066
Eugene, Oregon
727 behind my 67-440..

I have adjusted the kickdown linkage everyway I can and the tranny still shifts 1-2-3 way to fast for my liking.. Usually into third gear before I get through the intersection.. I have 294 rear end gears so you would think it would stay in 1st and 2nd a little longer... Shifts way to early at WOT also ( no tach so I can't say exactly)

What do I do next?? Valve body work?? New governor?? Any help....

Re: 727 upshifts, what to do next?? [Re: minivan] #489543
10/06/09 01:17 AM
10/06/09 01:17 AM
Joined: May 2008
Posts: 5,078
Aurora, Colorado
451Mopar Offline
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451Mopar  Offline
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Posts: 5,078
Aurora, Colorado
It's the valve body.

Re: 727 upshifts, what to do next?? [Re: 451Mopar] #489544
10/06/09 04:58 AM
10/06/09 04:58 AM
Joined: Sep 2008
Posts: 35
ont, canada
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kenny b Offline
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Posts: 35
ont, canada
Could also be a stuck governor on the tailshaft. In the book on rebuilding 727's there is a testing procedure using pressure gauges.

Kenny B

Re: 727 upshifts, what to do next?? [Re: minivan] #489545
10/06/09 04:05 PM
10/06/09 04:05 PM
Joined: Jan 2003
Posts: 20,062
Rio Linda, CA
John_Kunkel Offline
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John_Kunkel  Offline
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Posts: 20,062
Rio Linda, CA

Disconnect the linkage from the top lever on the trans and operate it by hand, the lever should have increasing spring resistance as it is moved rearward and should hit a hard stop both for and aft. If the lever feels soft against the stops, the shaft might have broken loose from its internal cam. The pic below shows the weld that often breaks.

5528800-TPcam.jpg (68 downloads)
Re: 727 upshifts, what to do next?? [Re: John_Kunkel] #489546
10/06/09 07:22 PM
10/06/09 07:22 PM

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For my information does that lever you show in the pic have an internal spring? I felt no resistance on mine and added an external spring. It shifts perfect now. Before that it would over-center and bind. thanks

Re: 727 upshifts, what to do next?? #489547
10/06/09 10:16 PM
10/06/09 10:16 PM
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT Offline
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Posts: 27,347
Today? Who Knows?
That level pushes a spool valve that has a very light spring on it... It should reach a solid stop in the forward direction when the bent tab contacts the limit screw.. It should have light spring tension then hit solid in the rearward direction when the spool bottoms in it's bore..

Re: 727 upshifts, what to do next?? [Re: 1_WILD_RT] #489548
10/06/09 11:54 PM
10/06/09 11:54 PM
Joined: Jan 2004
Posts: 9,066
Eugene, Oregon
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minivan Offline OP
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minivan  Offline OP
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Joined: Jan 2004
Posts: 9,066
Eugene, Oregon
I will check mine and respond back here.

Last edited by minivan; 10/06/09 11:54 PM.

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