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Can I fix the delayed 1-2 manual shift on my 727?
#1686816
10/17/14 11:55 AM
10/17/14 11:55 AM
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Joined: Jan 2003
Posts: 12,039
Benton, IL.
DaveRS23
OP
Special needs idiot
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OP
Special needs idiot
Joined: Jan 2003
Posts: 12,039
Benton, IL.
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727 with Trans-Go shift kit, 5,800 A&A gov, and 4,000 PTC converter. 3.91 rear gears in a street/strip car. I have been running this tranny for a while and it works real well. Good automatic shifts and right on 5,800. But if I jump on it with the selector in 1 and manually shift to 2, the delay for it to shift to 2nd is enormous, often hitting the rev limiter.
No matter how early I slip the shifter to 2, the actual shift is way late. The 2-3 shift is right after the shifter is moved, so the delayed manual 1-2 shift is the only issue I have with this tranny.
This is not the first tranny I have had that has a delayed manual 1-2 shift, but this one seems to be a bit more exaggerated than others.
Any way to get the tranny to go into 2nd when I move the shifter? And no, I don't want to put a manual valve body in.
Thanks!
Master, again and still
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: DaveRS23]
#1686817
10/17/14 12:37 PM
10/17/14 12:37 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
727 with Trans-Go shift kit, 5,800 A&A gov, and 4,000 PTC converter. 3.91 rear gears in a street/strip car. I have been running this tranny for a while and it works real well. Good automatic shifts and right on 5,800. But if I jump on it with the selector in 1 and manually shift to 2, the delay for it to shift to 2nd is enormous, often hitting the rev limiter.
No matter how early I slip the shifter to 2, the actual shift is way late. The 2-3 shift is right after the shifter is moved, so the delayed manual 1-2 shift is the only issue I have with this tranny.
This is not the first tranny I have had that has a delayed manual 1-2 shift, but this one seems to be a bit more exaggerated than others.
Any way to get the tranny to go into 2nd when I move the shifter? And no, I don't want to put a manual valve body in.
Thanks!
I don't know anything about them. I know I have 2 727s from Coan Trans in Kokomo Ind that absolutely destroy the tires on the 1-2 shift whenever I shift it manually or in full auto and they do not have manual valve body's in them. Very firm shifts for both shifts and have lasted a long time now, could not be happier with both trans. 
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: lewtot184]
#1686820
10/17/14 01:44 PM
10/17/14 01:44 PM
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Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
Silver70
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
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You can remove the accumulator spring.
68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: JohnRR]
#1686822
10/17/14 02:09 PM
10/17/14 02:09 PM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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What RPM are you manually shifting at?
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: GTX MATT]
#1686823
10/17/14 03:29 PM
10/17/14 03:29 PM
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Joined: Jan 2003
Posts: 12,039
Benton, IL.
DaveRS23
OP
Special needs idiot
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OP
Special needs idiot
Joined: Jan 2003
Posts: 12,039
Benton, IL.
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The tranny has the rigid (not flex) band, and the rev limiter is set at 6,500. I believe the lever is a 4.2. I don't remember if the accumulator spring is in there or not.
I do realize that the car is better off shifting for itself. That is why I went to the trouble to tune the WOT shift point. And the tranny shifts great at the track. I am not looking for the tranny to shift exactly at 5,800 when manually going to second. Just respond quick enough that the car doesn't nose over and hit the limiter.
But on the street playing around, I can't give it full throttle until it gets up a little speed. You know, roll into the throttle as the tires will hold it. But that requires a manual shift to second so that it doesn't short shift at part throttle as I roll into it.
So my choice is to either hit the throttle with the selector in 2 and the tranny will short shift because it is at part throttle. I guess I can't get it to full or near-full throttle quick enough. Or hit it with the selector in 1 and then shift to 2 as I get the thottle to the floor, but that is going to cause the tranny to hold in low too long. I probably move the lever to 2 somewhere around 4,000 or so.
So stopping the drum is key, huh? Any tips there?
Last edited by DaveRS23; 10/17/14 03:31 PM.
Master, again and still
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: DaveRS23]
#1686824
10/17/14 03:44 PM
10/17/14 03:44 PM
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Joined: Jan 2003
Posts: 25,757
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,757
Rio Linda, CA
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When the trans shifts 1-2 automatically the rear band isn't involved, when you manually shift 1-2 the rear band is involved; the band release time is the difference in the two shifts.
If throttling back slightly eliminates the delay, the TP linkage can be shortened.
The INTERNET, the MISinformation superhighway
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: DaveRS23]
#1686825
10/17/14 07:58 PM
10/17/14 07:58 PM
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Joined: Jan 2003
Posts: 74,979
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,979
U.S.S.A.
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Quote:
The tranny has the rigid (not flex) band, and the rev limiter is set at 6,500. I believe the lever is a 4.2. I don't remember if the accumulator spring is in there or not.
So stopping the drum is key, huh? Any tips there?
What material is on the band ?
Also in a way stopping the drum is key because that is the shift, no magic other than it has to happen.
Maybe John K. can explain how the rear servo releasing the rear band is connected to the front servo applying the band , if the 2 are connected , or mutually exclusive of each other ?
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: lewtot184]
#1686827
10/17/14 09:22 PM
10/17/14 09:22 PM
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Joined: Jan 2003
Posts: 12,039
Benton, IL.
DaveRS23
OP
Special needs idiot
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OP
Special needs idiot
Joined: Jan 2003
Posts: 12,039
Benton, IL.
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The band material is not Kevlar. But I am not sure other than that.
I can certainly back the kick-down linkage some. I was hoping to keep it where it is, because the low speed shifts are good and the WOT shift is right where I need it.
I may try that tomorrow and see if there is a sweet spot between where the low speed shift point is now and where it ends up if I can get the manual shift point to co-operate.
Master, again and still
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: John_Kunkel]
#1686828
10/17/14 09:29 PM
10/17/14 09:29 PM
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Joined: Jan 2003
Posts: 12,039
Benton, IL.
DaveRS23
OP
Special needs idiot
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OP
Special needs idiot
Joined: Jan 2003
Posts: 12,039
Benton, IL.
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Can much be done to get the band to release quicker in this case? Rear band, right?
Master, again and still
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: John_Kunkel]
#1686830
10/18/14 08:59 PM
10/18/14 08:59 PM
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Joined: Jan 2003
Posts: 12,039
Benton, IL.
DaveRS23
OP
Special needs idiot
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OP
Special needs idiot
Joined: Jan 2003
Posts: 12,039
Benton, IL.
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It has the TF-2 kit. I will pull the pan and rear servo and make sure that the heavier spring is there. And I can drill the piston, too.
Is the #40 drill the largest that should be used or is it a starting point? In order to clean up the 2-3 overlap, I ended up pulling the valve body 3 times. I tried a .010-.015 smaller orifice each time till it cleared up. Could I do the same thing with the rear piston? Start with the #40 drill bit and go up .010 or so at a time till the shift responded?
Master, again and still
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: DaveRS23]
#1686831
10/18/14 10:46 PM
10/18/14 10:46 PM
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Joined: Jan 2003
Posts: 74,979
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,979
U.S.S.A.
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Quote:
It has the TF-2 kit. I will pull the pan and rear servo and make sure that the heavier spring is there. And I can drill the piston, too.
Is the #40 drill the largest that should be used or is it a starting point? In order to clean up the 2-3 overlap, I ended up pulling the valve body 3 times. I tried a .010-.015 smaller orifice each time till it cleared up. Could I do the same thing with the rear piston? Start with the #40 drill bit and go up .010 or so at a time till the shift responded?
What year is the trans ? If pre 70 maybe get the valve John mentioned and possibly tweak the passage, or switch to the later VB ??
Drilling the hole bigger and bigger till you fix the not really a problem may cause a problem ... allowing the band to slip in reverse, reverse doesn't have the sparg helping to hold the drum ...
Just a thought .
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: lewtot184]
#1686833
10/19/14 01:50 AM
10/19/14 01:50 AM
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Joined: Feb 2009
Posts: 342
dracut mass usa
sparcy
enthusiast
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enthusiast
Joined: Feb 2009
Posts: 342
dracut mass usa
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just had that problem with my 727 1-2 seemed to wind out too much for me . I have a tf 2 I have the lokar cable for t v my brother owns a tray shop he said drop the pressure a little and its working fine .
IF YOU ARE NOT WRECKING STUFF YOU ARE NOT LEARNING !
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: sparcy]
#1686834
10/19/14 01:59 AM
10/19/14 01:59 AM
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Joined: Jan 2003
Posts: 74,979
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,979
U.S.S.A.
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Quote:
just had that problem with my 727 1-2 seemed to wind out too much for me . I have a tf 2 I have the lokar cable for t v my brother owns a tray shop he said drop the pressure a little and its working fine .
Unless you made changes to the Lokar setup it's the problem , it is not designed to work properly on a Mopar.
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Re: Can I fix the delayed 1-2 manual shift on my 727?
[Re: JohnRR]
#1686835
10/19/14 12:53 PM
10/19/14 12:53 PM
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Joined: Jan 2003
Posts: 12,039
Benton, IL.
DaveRS23
OP
Special needs idiot
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OP
Special needs idiot
Joined: Jan 2003
Posts: 12,039
Benton, IL.
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Quote:
Quote:
It has the TF-2 kit. I will pull the pan and rear servo and make sure that the heavier spring is there. And I can drill the piston, too.
Is the #40 drill the largest that should be used or is it a starting point? In order to clean up the 2-3 overlap, I ended up pulling the valve body 3 times. I tried a .010-.015 smaller orifice each time till it cleared up. Could I do the same thing with the rear piston? Start with the #40 drill bit and go up .010 or so at a time till the shift responded?
What year is the trans ? If pre 70 maybe get the valve John mentioned and possibly tweak the passage, or switch to the later VB ??
Drilling the hole bigger and bigger till you fix the not really a problem may cause a problem ... allowing the band to slip in reverse, reverse doesn't have the sparg helping to hold the drum ...
Just a thought .
It's a post 70 tranny. And I expect to find the heavier Trans-Go spring in the rear servo.
If I back off the kick-down linkage, it will affect the part throttle shift point and likely, the WOT shift point as well. I would prefer to try to avoid that.
I will try drilling the piston as John suggested and see if that clears up the delay. If it doesn't, it doesn't seem that experimenting with enlarging the hole further has a big down side. I don't use reverse very much and can monitor any issues that may be introduced. Besides, the mod is easily reversible.
Ideally, I would hope to address the delay issue without impacting the shift points. If the choice would be that or a soft reverse, then the soft reverse would be the lesser of two evils. For me.
Any thoughts?
Master, again and still
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