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Joined: Jan 2012
Posts: 15
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I have a turbo 400 automatic transmission. When I am in the top gear is the transmission suppose to kick down into passing gear when I floor the pedal? Could this be a vacuum problem or something not connected? Any help would be appreciated.
Thanks
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Joined: Jan 2004
Posts: 2,263
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Joined: Jan 2004
Posts: 2,263 |
On a TH400 the kickdown is actuated with an electrical switch which is mounted on the carb.
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Joined: Jan 2012
Posts: 15
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Someone told that it was an electrical switch but didnt know where it was. I will check the carb. The previous owner put a new 4 barrel on the engine so maybe he didnt hook it up. Thanks TOHCan for the tip. What would I be looking for on the carb? Is it typically located in the front or back of the carb? Thanks again
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Joined: Jan 2002
Posts: 7,719
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Posts: 7,719 |
This will be a black switch mounted to a bracket on the driver's side of the carb with a plunger jutting out from the front of it that the throttle lever hits as it approaches WOT (wide open throttle).
It will have 2 wires to it.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement
2006 Mustang V6 Pony, Vista Blue. Factory ordered.
2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it)
Old projects, gone but not forgotten:
1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it.
1980 Turbo Trans Am
1970 Mustang fastback, 351C 4Bbl, auto
1988 Mustang GT, 5 speed
1983 F-150 4x4, built 302
1994 Chevy K2500 HD 4x4, 454 TBI
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Joined: Apr 2010
Posts: 6,758
FGF Premium Member
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FGF Premium Member
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Colorado68's pic shows it best: 
Engine Test Stand Playlist: https://www.youtube.com/playlist?list=PLwoxyUwptUcdqEb-o2ArqyiUaHW0G_C88restoring my 1968 Firebird 400 HO convertible (Firedawg) 1965 Pontiac Catalina Safari Wagon 389 TriPower (Catwagon) 1999 JD AWS LX Lawn tractor 17hp (my daily driver) 2006 Sequoia 2017 Murano (wife's car) 202? Electric car 203? 68 Firebird /w electric engine 2007 Bayliner 175 runabout /w 3.0L Mercuiser__________________________________________________________
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Joined: Jan 2012
Posts: 15
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Joined: Jan 2012
Posts: 15 |
Awesome, Thanks a lot for the help. I checked this earlier and dont remember seeing this on my carb. It is a new 4 barrel that was purchased through summit. There are no other marks on it but the words Summit. I will check this in the morning. Thanks again.
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Joined: Jan 2002
Posts: 7,719
Power Member
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Power Member
Joined: Jan 2002
Posts: 7,719 |
If you do not have the OEM one, which is not reproduced and really difficult to locate used, Lokar makes an excellent replacement that utilizes a cable, works great with aftermarket carbs, and it really easy to install.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement
2006 Mustang V6 Pony, Vista Blue. Factory ordered.
2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it)
Old projects, gone but not forgotten:
1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it.
1980 Turbo Trans Am
1970 Mustang fastback, 351C 4Bbl, auto
1988 Mustang GT, 5 speed
1983 F-150 4x4, built 302
1994 Chevy K2500 HD 4x4, 454 TBI
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