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4 Spd. to TH400 (what about kickdown operation)

Discussion in 'The Garage' started by Scott A, Jun 10, 2004.

  1. Scott A

    Scott A 1/2 ton status

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    The previous owner installed the TH400. I noticed there is no wire that should be hooked up to the kick down connector on the driver’s side of the transmission. Don't I need to get the gas pedal kick down mechanism from an original TH400 truck, and then wire it to the transmission?

    UPDATE: I went to the junkyard and found the switch and all the wiring out of a 79 Suburban with a TH400. It bolted right in, one wire to the fusebox the other to the transmission and I am all done. /forums/images/graemlins/cool.gif
     
  2. cybrfire

    cybrfire 1 ton status Vendor GMOTM Winner

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    Put it on a button on the steering wheel. Just needs 12v and when you want to pass push and hold the button.
     
  3. lason

    lason 1/2 ton status

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  4. Scott A

    Scott A 1/2 ton status

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    I think I will just look at the Junk Yard for a factory TH400 kickdown pedal. I guess any 73 and up, Suburban, Truck or Blazer will do, that originaly came with a TH400. Should I grab the whole pedal? or is this a separate electrical part that attaches to my exsisting pedal or firewall??
     
  5. 84gmcjimmy

    84gmcjimmy 1 ton status

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    What does this kickdown thing do? /forums/images/graemlins/confused.gif
     
  6. MTBLAZER89

    MTBLAZER89 3/4 ton status Premium Member GMOTM Winner

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    I have a 400 equpped truck that is going to scrap where is the switch at?
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    Bolts to the pedal assembly or floor somehow...can't recall how, but when I pulled one some time back, I didn't grab the pedal, so I don't THINK it was a special pedal assembly.

    Works pretty much like the brake light switches as I recall. Very simple at least.
     
  8. Scott A

    Scott A 1/2 ton status

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    The switch is down by the gas pedal.

    What does it do:
    (It kicks the transmission into 2nd gear with you step on the gas all the way.)
     
  9. 84gmcjimmy

    84gmcjimmy 1 ton status

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    oooh okay. Thanks /forums/images/graemlins/thumb.gif
    Sorry for the hi-jack /forums/images/graemlins/doah.gif
     
  10. mrk5

    mrk5 The Sticker Guy Moderator Vendor GMOTM Winner Author

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    Here's a pic of a factory setup. Electrical connection on the left. To the right is the slide switch. As you depress the pedal the rod above the pivot point at the bottom of the picture comes toward you and contacts that brownish peg poking out to the right. The switch is just bolted to the pedal brace there. Should just need the switch and I'd guess it will bolt right in.
    [​IMG]
     

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