t/c lock up switch - Ford Powerstroke Diesel Forum
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  #1  
Old 09-24-2007, 12:03 PM
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t/c lock up switch

i just finished my home made lock up switch and wanted to know what speed or rpm i should lock and un lock it. right now it feels like it locks and unlocks around 45 mph but i do have 35in. tires any suggestions
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  #2  
Old 09-24-2007, 12:33 PM
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The good kits I have found lock up at 41mph, Just my 2 cents.
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Old 09-24-2007, 01:35 PM
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I have mine set to lock at 32 and unlock at 22... Works great for me everyday... Lock it a little sooner on the track...
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Old 09-24-2007, 01:52 PM
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my switch aint nothin fancy just a toggle you flip on and off. would this cause any damage to the lock up clutch switch on and off
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Old 09-25-2007, 05:47 AM
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According to my tranny builder the T/C lockup switch is a tranny saver. John wood said if I did not already have a switch he would have put one in my truck when he built the tranny.

Keep Strokin'
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  #6  
Old 09-25-2007, 05:50 AM
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sorry not trying to hijack....but what is this supposed to help. and when/why do it? i have seen a few threads on it but none say what the benifits are....
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  #7  
Old 09-25-2007, 06:21 AM
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yeah if you guys could explain a little more....I might have a light bulb turn on
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  #8  
Old 09-25-2007, 06:34 AM
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ok Cummins,, im curious how did you make a lockout switch? and what did you use?
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Old 09-25-2007, 07:18 AM
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The benefit of the switch is to get the Torque Converter Clutch to lockup sooner. The result is much less heat being created in the fluid from the "slipping" of the torque converter.
-Aaron
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Old 09-25-2007, 07:30 AM
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Mine is nothing more that a $.50 toggle switch from Radio Shack. One side is connected to the T/C lock up wire. The other, to a ground. When you flip the switch it grounds out and locks the T/C. It took me about 15 minutes to install. The hardest part was figuring out where I wanted the switch.

I use mine mainly for when I am pulling my 5er. Keeping the T/C locked, I can do engine braking. And the tranny doesn't go into coast when you touch the brake.

As for other benifits, you can lock the t/c over 25 mph and do some serious acceleration.

Anything under 25 mph and your engine starts to stall.

Any way's, I wouldn't think of towing with out it again.
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