The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-23-2015, 05:30 PM   #1
thefaceman
Registered User
 
thefaceman's Avatar
 
Join Date: Apr 2015
Location: Dallas, TX
Posts: 15
th400 kick down

I understand that the th400 kickdown is vacuum actuated as opposed to cable. I need to install one, but have not found a thread here that shows or discusses an install. Anyone know of a thread or other site/video showing install? I have a holley carb on a 350 and th400 trans. Thanks.
__________________
------------------------------
66 C/10 LWB

http://i.imgur.com/EcqZpK7.jpg
thefaceman is offline   Reply With Quote
Old 10-23-2015, 05:52 PM   #2
chevy_mike
Never Ending Projects
 
chevy_mike's Avatar
 
Join Date: Jul 2006
Location: San Diego, CA
Posts: 3,836
Re: th400 kick down

No, a TH400 is an electrical kickdown. The vacuum connection controls when it shifts up but not down. There should be an electrical connection on the driver side, IIRC. Apply 12 volts to it, it kicks down. Depending on the vehicle, they had an electric switch that mounted to the carb and the arm would contact or under the dash with a bracket and the gas pedal arm hit it. My first C10, someone had just put a switch under the dash so you could manually down shift and hold it in gear. Turn the switch off and it would shift like normal.
__________________
.
1965 C10 Panel, Tiki Express http://www.67-72chevytrucks.com/vboa...d.php?t=506580 SOLD
1968 Chevy C10, Long, Fleetside, Hot Rod Hauler http://67-72chevytrucks.com/vboard/s...d.php?t=313233 SOLD
1965 Chevy C10, Long, Fleetside, Hot Rod C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415702 SOLD


We were given two ears and one mouth for a reason... listen twice as much and speak half as often...
chevy_mike is offline   Reply With Quote
Old 10-24-2015, 10:13 AM   #3
ranger danger
Registered User
 
ranger danger's Avatar
 
Join Date: Jan 2015
Location: Vacaville CA
Posts: 896
Re: th400 kick down

Get one of these and your good to go.
http://www.amazon.com/Lokar-KD-2400HT-Electric-Kic... http://www.amazon.com/Lokar-KD-2400HT-Electric-Kic...
__________________
1969 C20 Suburban "Rez Dog"
Rebuild America one testicle at a time.
US Army 1977-1979 12B Combat Engineer
US Navy 1979-1983 Gunners Mate Guns (GMG)
NRA Life Member

Unrestrained Children in back seats cause Accidents.
Unrestrained Accidents in back seats cause Children.
ranger danger is offline   Reply With Quote
Old 10-26-2015, 11:10 AM   #4
thefaceman
Registered User
 
thefaceman's Avatar
 
Join Date: Apr 2015
Location: Dallas, TX
Posts: 15
Re: th400 kick down

Great. Looks like there is a 72 inch version as well 72 inch version as well. I think that version would be too long. Also looks like i need to buy the mounting bracket mounting bracket to attach the cable to carb.

Is this something a putz like me can do in my garage? Anything transmission related scares me.
__________________
------------------------------
66 C/10 LWB

http://i.imgur.com/EcqZpK7.jpg
thefaceman is offline   Reply With Quote
Old 10-26-2015, 12:39 PM   #5
earl84
Registered User
 
Join Date: Aug 2011
Location: Montrose, CO
Posts: 972
Re: th400 kick down

Super easy to do. I bought these exact same parts, installed in about An hour. Hardest part was routing the electrical neatly.
earl84 is offline   Reply With Quote
Old 10-26-2015, 03:27 PM   #6
thefaceman
Registered User
 
thefaceman's Avatar
 
Join Date: Apr 2015
Location: Dallas, TX
Posts: 15
Re: th400 kick down

I'm holding you to that "hour". Thanks everyone for helping me out. I've made the order. Hopefully the weekend will provide some time for install. Then I'm off to burn some rubber. I'll let you guys know how it goes.
__________________
------------------------------
66 C/10 LWB

http://i.imgur.com/EcqZpK7.jpg
thefaceman is offline   Reply With Quote
Old 10-26-2015, 06:42 PM   #7
franken
Registered User
 
Join Date: Jun 2013
Location: Somewhere
Posts: 3,052
Re: th400 kick down

Why would an electric whatever need a cable? The ones I've seen are a plunger switch activated by the carb when it goes WOT.
You could fab one up with a momentary switch and 3' of wire.
franken is offline   Reply With Quote
Old 10-26-2015, 06:56 PM   #8
ranger danger
Registered User
 
ranger danger's Avatar
 
Join Date: Jan 2015
Location: Vacaville CA
Posts: 896
Re: th400 kick down

The cable actuates the plunger inside the aluminum housing mounted to the trans. That makes a contact inside the housing and activates the trans kick down. All you see in the engine compartment is a cable. Nice and sanitary.
__________________
1969 C20 Suburban "Rez Dog"
Rebuild America one testicle at a time.
US Army 1977-1979 12B Combat Engineer
US Navy 1979-1983 Gunners Mate Guns (GMG)
NRA Life Member

Unrestrained Children in back seats cause Accidents.
Unrestrained Accidents in back seats cause Children.
ranger danger is offline   Reply With Quote
Reply

Bookmarks

Tags
kick down, th400, vacuum

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:12 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com