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  #1  
Old 06-07-2008, 08:01 AM
YourConfused YourConfused is offline
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looking for ideas on no 3rd brake issue

Hey all,

So I bought a 'new' trans a little while ago and have been fighting allot off issues with it. One thing that has not been addressed by Mike is the lack of 3rd gear braking. In the many pm's I never received any thought from him on what could be causing this condition. I have read that not having the sol A resistor (behind the batt) connected will cause this. Well I have it plugged in and the resistance tested good also, even after a drive when it was heated a bit.

So, what else can cause a trans to have no engine brake effect while the shifter is positioned in the 3rd gear slot?

Any takers would be appreciated.

Thanks,
Shaun
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Last edited by YourConfused; 06-07-2008 at 08:03 AM. Reason: details
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  #2  
Old 06-07-2008, 11:40 AM
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kwren kwren is offline
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I will be a taker!

Quote:
Originally Posted by YourConfused View Post
Hey all,

So I bought a 'new' trans a little while ago and have been fighting allot off issues with it. One thing that has not been addressed by Mike is the lack of 3rd gear braking. In the many pm's I never received any thought from him on what could be causing this condition. I have read that not having the sol A resistor (behind the batt) connected will cause this. Well I have it plugged in and the resistance tested good also, even after a drive when it was heated a bit.

So, what else can cause a trans to have no engine brake effect while the shifter is positioned in the 3rd gear slot?

Any takers would be appreciated.

Thanks,
Shaun
Simply take it back to the shop and get another transmission installed! Of course, it is in warranty

Have a great weekend!!!
Keith
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  #3  
Old 06-07-2008, 07:39 PM
YourConfused YourConfused is offline
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Quote:
Originally Posted by kwren View Post
Simply take it back to the shop and get another transmission installed! Of course, it is in warranty

Have a great weekend!!!
Keith
here is the warranty: ()

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Originally Posted by longassname View Post
If you break it in two you get both halves.
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blk 92' LSL w/ average mods

pics here http://s306.photobucket.com/albums/nn277/yourconfused/


Cash68: "Hmm, I wouldn't brag about beating Escorts. That's like saying you tricked a retarded person."
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  #4  
Old 06-07-2008, 10:12 PM
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kwren kwren is offline
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Why no warrenty?

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here is the warranty: ()
............
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  #5  
Old 06-08-2008, 12:27 AM
YourConfused YourConfused is offline
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Back On Topic...

I am still wondering what could be the cause of no engine brake in 3rd gear.

Does the brake band have anything to do with it?

Anyone with ideas?
__________________
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin


blk 92' LSL w/ average mods

pics here http://s306.photobucket.com/albums/nn277/yourconfused/


Cash68: "Hmm, I wouldn't brag about beating Escorts. That's like saying you tricked a retarded person."
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  #6  
Old 06-09-2008, 11:13 PM
oab_au oab_au is offline
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Quote:
Originally Posted by YourConfused View Post
Hey all,

So I bought a 'new' trans a little while ago and have been fighting allot off issues with it. One thing that has not been addressed by Mike is the lack of 3rd gear braking. In the many pm's I never received any thought from him on what could be causing this condition. I have read that not having the sol A resistor (behind the batt) connected will cause this. Well I have it plugged in and the resistance tested good also, even after a drive when it was heated a bit.

So, what else can cause a trans to have no engine brake effect while the shifter is positioned in the 3rd gear slot?

Any takers would be appreciated.

Thanks,
Shaun
I think your problem is related to the line pressure that has been increases when the the valve body was modified.

This raises problems with the Transfer clutch that can bind due to the higher pressure.
It also causes problems with the over-run clutch, because when the box is in D or 3rd position, the over-run clutch is not allowed to operate while the throttle is on or it will cause interlocking.
It knows this because it is looking at the line pressure, that it expects to drop to a set level to show that the throttle is closed.

This is the same pressure that the modification has raised, so it never gets to the set pressure that tells it that the throttle is closed and its OK to apply it.

Harvey.
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  #7  
Old 06-09-2008, 11:45 PM
YourConfused YourConfused is offline
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Quote:
Originally Posted by oab_au View Post
I think your problem is related to the line pressure that has been increases when the the valve body was modified.

This raises problems with the Transfer clutch that can bind due to the higher pressure.
It also causes problems with the over-run clutch, because when the box is in D or 3rd position, the over-run clutch is not allowed to operate while the throttle is on or it will cause interlocking.
It knows this because it is looking at the line pressure, that it expects to drop to a set level to show that the throttle is closed.

This is the same pressure that the modification has raised, so it never gets to the set pressure that tells it that the throttle is closed and its OK to apply it.

Harvey.

That sounds like a logical answer. Thanks for the input.
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"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin


blk 92' LSL w/ average mods

pics here http://s306.photobucket.com/albums/nn277/yourconfused/


Cash68: "Hmm, I wouldn't brag about beating Escorts. That's like saying you tricked a retarded person."
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  #8  
Old 06-10-2008, 12:17 AM
YourConfused YourConfused is offline
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So this brings me to the question of where the transmission should shift. Due to the fact that the ecutune 2v7 chip raises red line to 7300 rpm should the transmission shift at that that rpm or at the stock 6K rpm? Or are there other factors in this game also?
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"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." Benjamin Franklin


blk 92' LSL w/ average mods

pics here http://s306.photobucket.com/albums/nn277/yourconfused/


Cash68: "Hmm, I wouldn't brag about beating Escorts. That's like saying you tricked a retarded person."
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  #9  
Old 06-10-2008, 03:52 AM
oab_au oab_au is offline
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Quote:
Originally Posted by YourConfused View Post
So this brings me to the question of where the transmission should shift. Due to the fact that the ecutune 2v7 chip raises red line to 7300 rpm should the transmission shift at that that rpm or at the stock 6K rpm? Or are there other factors in this game also?
It will still shift at the same speed as normal. 6500??

Harvey.
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Tell it like it is!

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04 Liberty 30R Auto Premium. 92.000kls.
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  #10  
Old 06-10-2008, 06:55 PM
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Trevor Trevor is offline
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Quote:
Originally Posted by oab_au View Post
I think your problem is related to the line pressure that has been increases when the the valve body was modified.

This raises problems with the Transfer clutch that can bind due to the higher pressure.
It also causes problems with the over-run clutch, because when the box is in D or 3rd position, the over-run clutch is not allowed to operate while the throttle is on or it will cause interlocking.
It knows this because it is looking at the line pressure, that it expects to drop to a set level to show that the throttle is closed.

This is the same pressure that the modification has raised, so it never gets to the set pressure that tells it that the throttle is closed and its OK to apply it.

Harvey.
Line pressure which is involved with the control of automatic shifting, is regulated by the TCU via solenoid A. The base line pressure, as could be affected by a mechanical modification, is regulated. The use of a bleed system is very affective in the instance off adjusting against increased pressures.

It could be argued that the regulated pressure could be raised on a percentage basis, but pulse length modulation of solenoid A and the time element, means that such would be minimal.
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