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Indicator light for torque converter lockup

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Old Apr 3, 2011 | 05:10 PM
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Indicator light for torque converter lockup

How would be the best way to wire a simple LED in the dash that with light up when the torque converter locks up on my E4OD?
 
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Old Apr 4, 2011 | 08:04 AM
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From: Easton,Ks
This is the way I did it.
Note LED can get hot so mounted LED on hood release bracket.



/
 
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Old Apr 4, 2011 | 10:18 AM
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Your awesome subford, Thanks a million. I didnt waqnt to hook it straight off the P/Y wire because the draw of the LED might keep the tranny from seeing the correct voltage needed for lockup.

I didnt want to hook up the "switch" just yet...Im undecided on whether or not thats a good idea, my tranny is already slipping in reverse. I would just like to "monitor" and see when the ECU decides it wanted to use lockup.


So, In my case, this would work? Also, is that a dual fused link for the LED?

 
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Old Apr 4, 2011 | 12:43 PM
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From: Easton,Ks
Originally Posted by mdula
So, In my case, this would work? Also, is that a dual fused link for the LED?
No those are stock fuse links you already have.
The 1 Amp fuse is for the LED circuit.
Originally Posted by mdula
I didnt waqnt to hook it straight off the P/Y wire because the draw of the LED might keep the tranny from seeing the correct voltage needed for lockup.
The LED is powered from the battery and not the transmission. The computer grounds the P/Y wire to turn on the LED and to engage the clutch. You might check the voltage on the P/Y wire with the clutch engage from the computer and see if the voltage goes to near zero with the LED and without the LED. I would like to know this myself but have not had a chance to check it yet.
I would think if the transistor in the Computer can ground a solenoid then and added LED would not matter but I do not know for sure.
 
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Old Apr 4, 2011 | 01:32 PM
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Cool, I'll try this when I get home, and let you know. Have you had any negative opinions on using the switch? I was mainly interseted to improve tranny life through less wear and tear.
 
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Old Apr 4, 2011 | 03:10 PM
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From: Easton,Ks
No I have not heard any negative opinions on using the switch.
I use the switch for keeping the clutch in while going down steep hills for engine braking.
Because if I do not use the switch the clutch will disengage as soon as I touch the brake.
Of course I have to push the button in that is in the end of the shifter also to go into third gear when going down steep hills.

Just do not forget to turn the switch off before coming to a stop,
 
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Old Apr 4, 2011 | 03:12 PM
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IS it an issue shifting in and out of 3rd and 4th with it locked? Hard shifts, internal damage...etc...
 
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Old Apr 4, 2011 | 03:19 PM
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From: Easton,Ks
Originally Posted by mdula
IS it an issue shifting in and out of 3rd and 4th with it locked? Hard shifts, internal damage...etc...
Not that I am aware of.
By the way hard shifts are easier on the transmission than smooth shifts.
Smooth shifts means more ware on the clutch disks in the transmission and will generate more heat.
 
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Old Apr 4, 2011 | 04:01 PM
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Looks like I got a project tonight! I'll run a volt meter on it and drive it before wireing a switch to get an idea if there is a voltage draw from the LED. Thanks
 
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Old Apr 4, 2011 | 04:12 PM
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From: Easton,Ks
The voltage would be coming from the LED.
 
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