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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Let me get this straight..........

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    1/05/2020 10:13 PM  #1

    6sally6
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    From: Surfside Beach,SC
    Registered: 4/02/2013
    Posts: 6,868

    Let me get this straight..........

    When adjusting the TV cable on an A/T if its too LOOSE.........that's when it shift slow and WILL burn up the tranny. Right?!
    If its too tight....will it also burn it up?!  Tighter gives firmer and later shifts. Right?!
    Thanx
    6sal6

    Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
     

    1/05/2020 10:24 PM  #2

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,517

    Re: Let me get this straight..........

    I'm assuming the situation in Ford automatics is similar to the GM ones I'm familiar with.  The whole idea of the TV cable is that the transmission can match shift firmness and shift point to engine output.  Therefore, when adjusted correctly the transmission operates as intended.  When not adjusted correctly the transmission operates out of its design parameters.  A slack cable will cause soft, slipping shifts that will burn up the trans eventually.  An overly tight cable will cause problems too, mostly harsh part throttle shifts, which can break stuff in the trans. 

     

    1/06/2020 11:25 AM  #3

    Rudi
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    From: Stuck in the 50's Welland Ca
    Registered: 4/01/2013
    Posts: 3,976

    Re: Let me get this straight..........

    The TV cable is not there to alter shift points, messing with the TV cable could be big trouble without making sure the TV pressures are within the correct parameters.
    An oil pressure  gauge has to be connected to the pressure tap on the right side of the transmission and adjusted in the 28-38 range with 33 psi being optimum.
     There is a proper way of doing this which I won't go into unless I have to, google the method if you are going to set up the tranny properly.
     As for you question Mike, tightening the cable will increase the TV pressure and slightly increase the shift point and firmness. 
      Like many things in this world, better tight than loose

    Last edited by Rudi (1/06/2020 11:27 AM)

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

    1/06/2020 1:10 PM  #4

    rpm
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    From: Bakersfield, Ca
    Registered: 9/17/2013
    Posts: 3,668

    Re: Let me get this straight..........

    While the TV cable might not be there to raise shift points, it certainly did so when I tightened mine up ~3/16". Not a lot, just a few hundred rpm, but enough to notice.

    Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
     

    1/06/2020 3:51 PM  #5

    Gaba
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    From: Van Alstyne Texas
    Registered: 1/15/2014
    Posts: 1,009

    Re: Let me get this straight..........

    Bearing Bob wrote:

    While the TV cable might not be there to raise shift points, it certainly did so when I tightened mine up ~3/16". Not a lot, just a few hundred rpm, but enough to notice.

    +1
     

    If it aint broke, I have'nt tried to "Fix" it yet!
     

    1/06/2020 5:17 PM  #6

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,517

    Re: Let me get this straight..........

    Shift RPM needs to be set by changing the configuration of the governor.  It can be altered by adjusting the TV cable, but its not the correct way to do it.  Thinking that its okay because its not loose and prone to slip is simply not correct.  Damage can also occur from overly harsh shifts, which is what on over tightened TV cable produces. 

    Shift firmness, likewise should be tailored in the valvebody, not by tightening the TV cable. 
     

     

    1/07/2020 12:50 AM  #7

    rpm
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    From: Bakersfield, Ca
    Registered: 9/17/2013
    Posts: 3,668

    Re: Let me get this straight..........

    Ya, well... butt. Figured since I rebuilt this tranny, if she blows I'll rebuild it or put in one that takes a third pedal. If it matters, I also checked my pressure with a gauge.

    Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
     

    1/07/2020 3:31 PM  #8

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,517

    Re: Let me get this straight..........

    Bearing Bob wrote:

    Ya, well... butt. Figured since I rebuilt this tranny, if she blows I'll rebuild it or put in one that takes a third pedal. If it matters, I also checked my pressure with a gauge.

    Blow it up and swap to a manual?  You'll get no argument from me

     

     

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