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Old 02-16-2007, 08:45 PM
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wiring for Caddy 400 trans

ok i've done a search & couldn't come up w/the answer i needed soooooooooooo i'll ask here.
i need a wiring diagram for the electronic transmission kick down for my 78 Caddy 425/400 combo...thanks...joe

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Old 02-17-2007, 09:59 AM
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There's not much to wire. The kickdown solenoid simply needs a switch somewhere on the throttle linkage that closes at wide open throttle and sends +12V to the trans. Does your trans have one terminal or two on the connector? Some 70s-vintage TH400s have a second signal coming from the trans that operates emissions control hardware in certain gears. That's unrelated to the kickdown. This is also not to be confused with the 60s-vintage TH400s that have the dual stall speed torque converter.
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Old 02-17-2007, 11:41 PM
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I had a Gremlin At one time with a turbo 400 I hooked up the kickdown to the washer switch I was able to kickdown manually before even Depressing pedal Anyone who saw me push the button said wow thats kool You could wire it to any switch Just a thought
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Old 02-18-2007, 12:38 AM
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On my Turbo 400 ... I just fabricated up a simple bracket that holds a switch ... when it is pulled ( adjustable ) ... it sends the 12V to the Turbo 400 and activates the passing gear.
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Old 02-18-2007, 09:50 AM
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thanks folks i knew it was something simple BUT wanted to be sure how it was hooked up, that & the fact i hate to do electric and just wanted to be sure how it hooked up.....joe

Last edited by TooMany2count; 02-18-2007 at 04:05 PM.
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