Kickdown function
Thread Starter
Cruising
Joined: May 2023
Posts: 11
Likes: 0
Kickdown function
Hello.
I have a C3 1968 327 automatic. Can someone explain with certainty how the kickdown works on this one. I have a vacuum pipe down to the gearbox. Is this the only control of kickdown? On my gearbox there is a switch with a wire that goes into the car but is not connected. I suspect that my gearbox is newer....was a switch used in addition to the vacuum on later gearboxes?
I have a C3 1968 327 automatic. Can someone explain with certainty how the kickdown works on this one. I have a vacuum pipe down to the gearbox. Is this the only control of kickdown? On my gearbox there is a switch with a wire that goes into the car but is not connected. I suspect that my gearbox is newer....was a switch used in addition to the vacuum on later gearboxes?
Safety Car
Joined: Oct 2004
Posts: 3,926
Likes: 739
From: Youngstown Ohio
Welcome to the Forum. First off, that vacuum pipe has nothing to do with the kickdown......that goes to the vacuum modulator. If you're shifting OK (other than kickdown), then it's working OK. The switch with the disconnected wire is your problem. It controls your kickdown. Connect it, and make sure it is activated by pressing it in at the gas pedal when you fully depress it.
Thread Starter
Cruising
Joined: May 2023
Posts: 11
Likes: 0
Hello and thanks for the good answer. There is no switch inside my car just wire... is the switch on the gas pedal? Have to build this back again. If it's just a wire, I think this is plus down to the gearbox above the switch in the car...
Safety Car
Joined: Oct 2004
Posts: 3,926
Likes: 739
From: Youngstown Ohio
If yours is missing, You'll need to purchase a new one.....https://www.zip-corvette.com/69-77-t...wn-switch.html
Melting Slicks
Joined: Feb 2018
Posts: 2,327
Likes: 721
From: Marietta GA
Start reading and reading, the switch is one of the worst things to work on, unless you have a small rabbit size robot. Some guys remove the drivers seat, others were contortionist in a circus and the job is simple. If you can live without the kick down switch, so be it. Welcome to the Forum
Thread Starter
Cruising
Joined: May 2023
Posts: 11
Likes: 0
Hello. I have a 68 C3 327 automatic. The cooling system gets a lot of pressure when the engine is cold. Heats up very quickly but does not boil. It's fine to drive a trip with a lot of pressure. If I release the pressure when the engine is warm and put the lid on, the pressure does not return. Before cold start. Shouldn't be like this. Desperately need advice here.
Last edited by kjande; May 15, 2023 at 02:09 AM.
Race Director
Joined: May 2006
Posts: 18,734
Likes: 2,582
Hello. I have a 68 C3 327 automatic. The cooling system gets a lot of pressure when the engine is cold. Heats up very quickly but does not boil. It's fine to drive a trip with a lot of pressure. If I release the pressure when the engine is warm and put the lid on, the pressure does not return. Before cold start. Shouldn't be like this. Desperately need advice here.
https://www.corvetteforum.com/forums...ng-system.html
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