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random wire i need to know about

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Old Mar 13, 2010 | 06:32 PM
  #1  
beatereater's Avatar
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Car: 84 Trans am
Engine: 355
Transmission: TH400
Axle/Gears: 343 rear end
random wire i need to know about

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Old Mar 13, 2010 | 06:33 PM
  #2  
beatereater's Avatar
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Car: 84 Trans am
Engine: 355
Transmission: TH400
Axle/Gears: 343 rear end
Re: random wire i need to know about

i have no clue wat this is.. it comes out of the transmission.. i have only dealt with manuals and would like to keep it that way but i couldn't pass this up...
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Old Mar 13, 2010 | 06:55 PM
  #3  
camaronewbie's Avatar
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From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: random wire i need to know about

It's the detent cable or the TV cable - depending on what transmission this is from. If it's a TH350 or TH400, it's called a detent cable - it it's a TH700R4 then it's a TV cable.

The difference - a TV cable precisely opens and closes the Throttle Valve in the transmission (hence the name TV cable), and because of the precise nature of insuring this valve is opened accordingly to properly shift the transmission, it has to be geometrically correct and adjusted just right - otherwise a TH700R4 can burn up in a hurry if its not properly aligned and adjusted.

A detent cable kinda does the same operation, but is not nearly as precise.

Either way, it gets connected to the throttle linkage - if it's a TV cable, you'll need the correct geometry corrector if using an aftermarket carb, along with the proper throttle cable bracket to make sure everything is lined up and geometrically correct.

Hope that helps.
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Old Mar 13, 2010 | 07:15 PM
  #4  
beatereater's Avatar
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Joined: Apr 2009
Posts: 44
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Car: 84 Trans am
Engine: 355
Transmission: TH400
Axle/Gears: 343 rear end
Re: random wire i need to know about

thanks for the info.. although i was afraid i would need it.. the transmission is a th400, would you know where to get a connector like you were talking about.?
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Old Mar 13, 2010 | 07:27 PM
  #5  
beatereater's Avatar
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Joined: Apr 2009
Posts: 44
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Car: 84 Trans am
Engine: 355
Transmission: TH400
Axle/Gears: 343 rear end
Re: random wire i need to know about

and what would happen if i didnt hook it up?
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Old Mar 14, 2010 | 03:35 PM
  #6  
camaronewbie's Avatar
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Joined: Sep 2002
Posts: 9,192
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From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: random wire i need to know about

I'm no expert with the older detent cables - it effects the shifting of your transmission - I wouldn't run without it connected. It connects to a stud on your carb linkage - ask in the transmission board if there are particulars for connecting it - since it's a TH400, I don't think it's as critical to have the geometry or the adjustment as precise - but check with someone who knows.
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Old Mar 14, 2010 | 03:40 PM
  #7  
bcmag's Avatar
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Re: random wire i need to know about

this cable has a huge influence on operational line pressure!if you dont hook it up you smoke every piece of friction in the unit!
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