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Old 09-12-2010, 04:12 PM   #1
chucksdrt
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Default 727 2-3 shift help

Having problem with the 2-3 shift in a chrysler 727 the trans is fresh 5 front clutch all 15 new springs in front clutch pack billet servos front and rear and a turbo action reverse pattern valve body. The 1-2 shift is perfect but at part throttle cruising there seems to be an overlap issue on the 2-3 shift it bangs hard. At full throttle all seems well I was told by another trans shop that they think its a v/b issue. Thanks for any help
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Old 09-12-2010, 06:51 PM   #2
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Default Re: 727 2-3 shift help

What rocker arm are you using?


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Old 09-12-2010, 08:02 PM   #3
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Default Re: 727 2-3 shift help

the lever is a 4.2
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Old 09-12-2010, 10:24 PM   #4
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Default Re: 727 2-3 shift help

Keep taking lever away until the problem goes away. There are a few different int release springs , you can tailor it some more from there if you have the patience.
Depending on how fast your car is , I would stay with a 3.2-3.8 lever.


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Old 09-15-2010, 12:09 AM   #5
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Default Re: 727 2-3 shift help

Quote:
Originally Posted by Hutch View Post
Keep taking lever away until the problem goes away. There are a few different int release springs , you can tailor it some more from there if you have the patience.
Depending on how fast your car is , I would stay with a 3.2-3.8 lever.


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Hutch is right on the lever, its easy to over lever a torque flight, one other thing that can happen on the cheetah valve body (no trans brake I assume) is some people will turn the screw (more pressure) all the way up, sometimes that will cause a overlap on the 2-3 shift.
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Old 09-15-2010, 08:28 AM   #6
chucksdrt
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Default Re: 727 2-3 shift help

Ill have to check that since we did buy the v/b used.
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Old 09-16-2010, 06:32 PM   #7
chucksdrt
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Default Re: 727 2-3 shift help

We are going to put a 3.8 lever in it and try a restrictor in the front clutch passage.
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Old 09-17-2010, 03:33 PM   #8
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Default Re: 727 2-3 shift help

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Originally Posted by chucksdrt View Post
We are going to put a 3.8 lever in it and try a restrictor in the front clutch passage.
Welcome to the world of cheetah!
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Old 01-09-2011, 06:01 AM   #9
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Default Re: 727 2-3 shift help

When it comes to torqueflites, they always have been plaged with overlap and timing problems. The mith of tight clutch pack clearances go out the window when doing one of these. You can not build a torqueflite like the others. In order to prevent the hard thud of being in 2nd and 3rd at the same time, these mods will help you. You must try to use two springs in the 2nd gear servo to pull 2nd gear off quicker, and most important, slow down 3rd engagement by making the clutch clearance .080 to .110. This will help prevent being in 2 gears at once. I always try to adjust the 2nd band as follows, torque to 72 in pounds, then back off 2-1/2 turns, sometimes even more to reduce bind up. We hope this may help you in some way. Burt www.burtbrownracingtrans.com

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Old 01-22-2011, 05:18 AM   #10
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Default Re: 727 2-3 shift help

We have ran many Cheetah reverse valve bodies in the torqueflites very successfully I might add. If the restrictor didn't come with the V.B. use a soft plug that fits snug into the 3rd gear hole in the case, then drill a 1/8" hole in it then place it in the 3rd gear/direct apply hole in the case. In most cases, if you do the Mods stated above internally, and do not run anything less then 9 return springs in the high gear clutch pack. You may not have to install the 3rd gear restictor orfice plug. Also you should install a heavier spring in the reverse apply servo. I also drill a 1/16" hole in the reverse servo piston. I built my first Torqueflite in 1973 so been doing them a while. Burt
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