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09-15-2024, 06:07 PM | #1 |
Senior Member
Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,763
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1969 TH400 transmission kickdown setup
Hi folks,
I have a 1969 CST/10 with a 350 engine, Quadrajet, and TH400 transmission. The kickdown mounts on the Quadrajet back left stud and is pressed with the original press lever that mounts on the throttle assembly. When this was on the truck before engine overhaul, I didn't get a picture and the overhauler chucked the kickdown and said "you don't need that." When I drove the truck to the transmission shop and had them overhaul the transmission, I asked them about the kickdown, and they said "you don't need that." A few years went by and I connected a 12V source to a light switch, and the other terminal on the light switch to the transmission, and took it for a test drive. When I floored the gas pedal, I simultaneously flipped the light switch. I concluded "I need that." So, I bought the kickdown switch from a forum member and now I'm installing it. This is what it looks like when idle and when full throttle. Does this look like the correct setup and correct action on the switch? |
09-15-2024, 07:20 PM | #2 |
Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,468
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Re: 1969 TH400 transmission kickdown setup
Here's mine, on my '70, but just the side view.
__________________
~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
09-15-2024, 07:28 PM | #3 |
Senior Member
Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,763
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Re: 1969 TH400 transmission kickdown setup
OK it looks like on yours the half-round cut out on the presser foot straddles the bottom unused hole instead of like I have it straddling the accelerator rod hole. I will see if mine fits better that way. It seems like the presser foot should hit the switch in a more straight-on way. Your switch looks quite different.
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kickdown, th400 |
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