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Old 06-08-2009, 10:06 AM
Evil Stu's Avatar
Evil Stu Evil Stu is offline
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Default THM 400 Kickdown

All,

70 GTO with a thm400

The car has had the harness replaced with a painless one and there is no kickdown, Everything else on the cars works but these wires were not run. I'm not much on electrical things but I want a kickdown. How do i wire one of these?

I think one side of the switch goes to ground but I don't know where the other should go?

Type answers slow...small words...

Stu

  #2  
Old 06-08-2009, 10:25 AM
"QUICK-SILVER" "QUICK-SILVER" is offline
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Use any switched hot wire for power. Usually the black wire with yellow stripe that goes to the wiper motor is a good switched source.

Hook up a switched hot wire to one terminal on the passing gear switch, and run another wire from the other terminal on the passing gear switch to the plug-in on the transmision.

The passing gear switch just turns power on to the solenoid in the transmission.

  #3  
Old 06-12-2009, 11:12 PM
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BVR421 BVR421 is offline
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your gto should have a kickdown switch just above the gas pedal? The pedal linkage hits the slider and makes electrical contact at about 3/4 throttle. The slider is a self adjusting deal when you click it all the way out then push back in. It adjusts the same way as the TV adjustment on a TH350 at the carb linkage if you've ever had one of those.
I think even original 4sp cars had the 2 wires for the kickdown in the loom just not used. Look for those wires above gas pedal. A kickdown switch is just a switch between a 12v source (when car is running) and the solenoid on the side of the trans.

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Old 06-20-2009, 01:01 PM
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BVR421 BVR421 is offline
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Maybe too late now but yesterday another post had this excellent pic of the kickdown I mentioned
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