th400 kickdown switch
Thread Starter
Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
th400 kickdown switch
i am trying to find the underdash switch for my th400 kickdown.
i tried corvette central, midamerica, ecklers, and lectric unlimited.
searching on those sites for th400 kickdown switch doesnt show what i need.
any suggestions.
i tried corvette central, midamerica, ecklers, and lectric unlimited.
searching on those sites for th400 kickdown switch doesnt show what i need.
any suggestions.
Burning Brakes
Joined: Jun 2008
Posts: 1,086
Likes: 1
From: Michigan
This is probably what you want. After installation push the stem all the way forward (kind of hard) until you hear a noise. It will then set itself the next time the gas pedal goes to WOT.
http://willcoxcorvette.com/advanced_...ssion%20switch
http://willcoxcorvette.com/advanced_...ssion%20switch
Le Mans Master
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
Thread Starter
Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
i was using the wrong words in the retailers search engine.
transmission switch brings up what i need at every place i try now.
transmisson kickdown is what i was using and that doesnt work.
transmission switch brings up what i need at every place i try now.
transmisson kickdown is what i was using and that doesnt work.
4th Gear
Joined: Oct 2009
Posts: 4
Likes: 0
From: Byron Illinois
I am looking to install this part as well. How tough is it? Is there a good way to test the selenoid on the transmission to make sure that works? I also see some of the wires are bare, not melted or anything, just not covered. This part was gone when I bought the car, wondered why it did not downshift when putting the accelerator down. Any other help would be appreciated as to testing and wireing it up. Thanks
Burning Brakes
Joined: Mar 2003
Posts: 891
Likes: 165
From: Oswego IL
I am looking to install this part as well. How tough is it? Is there a good way to test the selenoid on the transmission to make sure that works? I also see some of the wires are bare, not melted or anything, just not covered. This part was gone when I bought the car, wondered why it did not downshift when putting the accelerator down. Any other help would be appreciated as to testing and wireing it up. Thanks
If pressing on the gas pedal does not fully engage the switch, you can slide a small piece of rubber gas hose, or the like, over the cylinder arm of the switch and it will allow some greater movement.
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Burning Brakes
Joined: Jun 2008
Posts: 1,086
Likes: 1
From: Michigan
Good advice here. As mentioned the switch is self adjusting. Perhaps the switch is o.k. but just out of adjustment. Reach up and push the arm on the switch toward the direction of the engine. It takes a little force so push hard at the base of the arm. When you hear a snap or thump or click or noise it has reset. The next time you push the gas pedal to WOT it will set itself.
At WOT with the switch in the on position you should be able to check the wire connector to see if it is hot.
At WOT with the switch in the on position you should be able to check the wire connector to see if it is hot.
Burning Brakes
Joined: Mar 2003
Posts: 891
Likes: 165
From: Oswego IL
I had one switch that I could not seem to get adjusted after resetting several times, bending the gas pedal, etc. To get it adjusted just the way I wanted it, I used a small piece of rubber gas hose, which brought it pretty close but not perfect. The fix was going to the auto store and buying short piece of a larger rubber hose that slid over the rubber gas line. Overall the armature was about 3/8 to 1/2 inch wider in diameter when I was done which allowed the kickdown to work great ever since.
Burning Brakes
Joined: Jun 2008
Posts: 1,086
Likes: 1
From: Michigan
Sean, I would bet your pedal would push the switch far enough to energize if you would do the "self adjust" I mentioned in my post. If the pedal arm pushes the switch arm at all it should self adjust. The piece of hose over the switch arm is a good idea if you can keep it from working itself out of position.
