School Me On The Torque Converter Lockup Switch - Ford Powerstroke Diesel Forum
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Old 09-07-2010, 04:04 PM
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School Me On The Torque Converter Lockup Switch

I am interested on doing the TC lockup switch, the easy one with just the wires and a switch. I am wondering what wire(s) i need to tap into and what i need to do to make it work. I have been reading around, and i have only found info for the complicated one, that doesnt flash the dash light. i am also wondering what goes on when I flip the switch. I have seen videos of a cummins with a tc lockuo switch, and it sounds like a manual trans.
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Old 09-07-2010, 07:39 PM
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im curious as well.
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Old 09-08-2010, 06:16 PM
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me three lol
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Old 09-08-2010, 06:30 PM
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TC lockup does just that- locks the converter and keeps it locked. Ive had mine done for years and once in a while it comes in handy. lol. Under the hood beside the master cylinder against the drivers side fender(on my 02 anyway, and some other years) there are 3 large square electrical plugs(pin type). In one of those plugs is a purple wire with yellow stripe. Using a scotchlock to attach a piece of wire to that wire< run the new wire into the cab. Take a second wire and ground it somewhere under the dash. now take the wire from under the hood and the grounded wire and attach them to a flip switch of some sort. When the truck is running and in gear, if you flip the switch and complete the circuit(grounding the wire attached to the purple wire) the converter will lock. Takes about 5 dollars and 15 mins.
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Old 09-08-2010, 06:43 PM
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^^^^ what he said. i wired mine up about a month ago. its kinda more than useful if you ask me. keeps trans heat way down if you use it all the time....when you can. i have a E4OD so all gears can lock up except for 1st you have r4100 so all gears will lock up. the clutch on a TC isnt like a clutch in a manual tans at all. its not made to slip like a manual trans clutch is, so be easy on it. i try to match RPMs when i engage it.
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Old 09-08-2010, 07:05 PM
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Is Locking up the Torque convert locked all the time going to have effects on your tranny good or bad???
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Old 09-08-2010, 07:15 PM
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if you dont stop you will be fine lolol

idk about good or bad. its gonna be a harder shift. it may make you TC last longer. but if you abuse your TC clutch then that wil go in a heart beat.

for ex; dont sit at a stop light building boost and then hit the switch.
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Old 09-08-2010, 07:16 PM
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im so doing this tomorrow or friday.. ha piece of cake.
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Old 09-08-2010, 07:17 PM
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yeah its really simple
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Old 09-08-2010, 07:18 PM
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It'll keep it cooler. I try not to lock it in first. And never keep it locked under 20 MPH unless I'm in 2nd on the selector. If I'm going between 20 and about 35 I keep OD off other wise it sounds bad. Just don't let it make grinding noises You'll learn fast how to do that. I can drive it now to make it sound like a manual. It's pretty fun.
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