C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

TV Cable adjust

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Old May 8, 2017 | 03:59 PM
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Default TV Cable adjust

I know this has been gone through before. I have read the threads, FSM. I just get confused by if I should tighten the cable first etc, seems to read different depending on where you read. Did some disassembly and moving around stuff may have slipped the cable, so want to adjust before driving very far. 1985 L98., stock, nothing special.

I pushed in the d shaped detent on the TV cable. While depressed I pulled the cable back as far as it would go towards the firewall. Released the detent button. Pulled the throttle very hard to wide open throttle, the unit did ratchet forward. Released the throttle. I understand that it should now be set. Does this sound correct, I can be a little bit rock headed when it comes to simple instructions Thank you
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Old May 8, 2017 | 04:36 PM
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Originally Posted by FrostyMountain
I know this has been gone through before. I have read the threads, FSM. I just get confused by if I should tighten the cable first etc, seems to read different depending on where you read. Did some disassembly and moving around stuff may have slipped the cable, so want to adjust before driving very far. 1985 L98., stock, nothing special.

I pushed in the d shaped detent on the TV cable. While depressed I pulled the cable back as far as it would go towards the firewall. Released the detent button. Pulled the throttle very hard to wide open throttle, the unit did ratchet forward. Released the throttle. I understand that it should now be set. Does this sound correct, I can be a little bit rock headed when it comes to simple instructions Thank you
Yes you are on the right track except the first adjustment is done by using gas pedal inside the car, adjust and test if the shifts are too harsh go for a extra click at the Throttle Body(grabbing throttle and twisting). If still harsh you can try to get 1 more click using a pair of pliers but that is a last resort
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Old May 8, 2017 | 04:38 PM
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1) Have a friend hold the gas to the floor.

2) Adjust cable to max tension.
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Old May 10, 2017 | 04:41 PM
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This is where such a simple thing seems to confuse me. So i have already as I described first pushed in the detent, then pushed or pulled just the cable toward the firewall to take out slack. Pulled the throttle to wide open and it did ratchet forward., released the throttle, and in an ideal world that should set it to factory specs. What you appear to be saying is I should know pull the throttle back again and set it to or3 or 4 or more clicks by counting the ckicks this time. I know it is simple but its still confusing the heck out of me.
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Old May 10, 2017 | 06:23 PM
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Originally Posted by FrostyMountain
This is where such a simple thing seems to confuse me. So i have already as I described first pushed in the detent, then pushed or pulled just the cable toward the firewall to take out slack. Pulled the throttle to wide open and it did ratchet forward., released the throttle, and in an ideal world that should set it to factory specs. What you appear to be saying is I should know pull the throttle back again and set it to or3 or 4 or more clicks by counting the ckicks this time. I know it is simple but its still confusing the heck out of me.
It is a little confusing, because USUALLY, that cable is an adjustment used to fine tune the shift schedule.

But the 700/4L60 is a little different because it is super sensitive to low pressure. For this reason, we want it adjusted to max tension at WOT.

On any other car, we'd be setting it differently. But that would be a mistake on the 700R4/4L60.
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Old May 10, 2017 | 11:36 PM
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Originally Posted by FrostyMountain
I pushed in the d shaped detent on the TV cable. While depressed I pulled the cable back as far as it would go towards the firewall. Released the detent button. Pulled the throttle very hard to wide open throttle, the unit did ratchet forward. Released the throttle. I understand that it should now be set.
It's not the cable (I call the steel wire the cable) that you push back toward the firewall, it's the black plastic threaded part. Then you open the throttle as far as it will go. The black plastic part should move forward, making a clicking sound as it does so.
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Old May 11, 2017 | 12:29 AM
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Originally Posted by Cliff Harris
It's not the cable (I call the steel wire the cable) that you push back toward the firewall, it's the black plastic threaded part. Then you open the throttle as far as it will go. The black plastic part should move forward, making a clicking sound as it does so.

further to cliffs comments, i found on my 85 it wasnt like a slow click click click. it would just do a big movement all at once.

just mentioning in case you were expecting a slow clicking with increasing foot pedal pressure. thats not how mine worked
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Old May 11, 2017 | 10:24 AM
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Yep mine clicked fast. It seems that a harder shifting, tighter cable is safer for the tranny that a looser softer shift. Ill leave as is. Ecklers shows new stock cables for less than 30 dollars, perhaps Ill order one to make sure everything ix operating as new, now that I understand the simple adjustment
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Old May 11, 2017 | 10:48 AM
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it's a pain in the *** to install FYI. So unless yours is broken somehow which I highly doubt, I wouldn't mess with it.
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Old May 11, 2017 | 12:10 PM
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Originally Posted by VikingTrad3r
it's a pain in the *** to install FYI. So unless yours is broken somehow which I highly doubt, I wouldn't mess with it.
It's not a Total Pain but if not needed why even go there, So if it moves Freely, Adjusts and it has and still has it's throttle end clip (even thought you can get a replacements)
Amazon Amazon
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Old May 11, 2017 | 06:36 PM
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OK advice well taken. What concerned me is that the cable housing (plastic sheath covering the metal cable, has a dozen or so notches in it . Before I adjusted it per above, I could count 10 notches, before the adjuster covered the notches. Now the cable must be considerably tighter, as all those notches are visable behind( firewall side) of the housing, guess the cable is tighter. It is guitar string tight
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Old May 11, 2017 | 07:49 PM
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Originally Posted by FrostyMountain
OK advice well taken. What concerned me is that the cable housing (plastic sheath covering the metal cable, has a dozen or so notches in it . Before I adjusted it per above, I could count 10 notches, before the adjuster covered the notches. Now the cable must be considerably tighter, as all those notches are visable behind( firewall side) of the housing, guess the cable is tighter. It is guitar string tight

With the throttle closed you should be able to move the cable up and down with some tention, when the throttle wide open yes it's pretty tight
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Old May 11, 2017 | 07:51 PM
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I don't use the "step on the pedal" method anymore. Broke too many old TV cable adjusters like that.
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Old May 11, 2017 | 10:48 PM
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Consider the initial setup to be just that, you can fine tune a tiny bit to your car.

As others have said, the black connector with the detent is the reference. Typically a tiny bit towards the throttle level will likely soften the shifts, a tiny bit back may be possible depending on throttle pedal range, it it's a little short of full throttle level, it won't hit max and pop the connector forward. I'd rather use the pedal to initial set because of that, sets the furthest back possible

Adjust based on your shifts, too soft is bad, too hard is bad. Depends on throttle level, of course, but also on driving style. I imagine autocross is a lot different than street.
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Old May 12, 2017 | 12:21 AM
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Originally Posted by confab
1) Have a friend hold the gas to the floor.

2) Adjust cable to max tension.
Reverse this

Adjust the cable to min setting.
Then get in the car and mash the throttle to the floor

(engine off)
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