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10-23-2015, 05:30 PM
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#1 |
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Registered User
Join Date: Apr 2015
Location: Dallas, TX
Posts: 15
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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.
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10-23-2015, 05:52 PM
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#2 |
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Never Ending Projects
Join Date: Jul 2006
Location: San Diego, CA
Posts: 3,836
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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.
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. 1965 C10 Panel,  Tiki Express http://www.67-72chevytrucks.com/vboa...d.php?t=506580 SOLD1968 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... |
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10-24-2015, 10:13 AM
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#3 |
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Registered User
 
Join Date: Jan 2015
Location: Vacaville CA
Posts: 896
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Re: th400 kick down
__________________
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. |
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10-26-2015, 11:10 AM
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#4 |
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Registered User
Join Date: Apr 2015
Location: Dallas, TX
Posts: 15
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Re: th400 kick down
Great. Looks like there is a
 72 inch version as well. I think that version would be too long. Also looks like i need to buy the 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. |
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10-26-2015, 12:39 PM
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#5 |
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Registered User
Join Date: Aug 2011
Location: Montrose, CO
Posts: 972
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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.
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10-26-2015, 03:27 PM
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#6 |
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Registered User
Join Date: Apr 2015
Location: Dallas, TX
Posts: 15
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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.
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10-26-2015, 06:42 PM
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#7 |
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Registered User
Join Date: Jun 2013
Location: Somewhere
Posts: 3,100
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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. |
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10-26-2015, 06:56 PM
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#8 |
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Registered User
Join Date: Jan 2015
Location: Vacaville CA
Posts: 896
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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. |
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