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

Changing the TV cable?

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Old Nov 27, 2006 | 11:42 AM
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Default Changing the TV cable?

I am in the process of doing this, it looks like the exhaust has to be dropped off the exhaust manifolds to have room to reach the cable on the transmission? Is there any other way? The exhaust manifold nuts are rusted solid. It looks as though the stud will break.
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Old Nov 27, 2006 | 02:32 PM
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Originally Posted by Aardwolf
I am in the process of doing this, it looks like the exhaust has to be dropped off the exhaust manifolds to have room to reach the cable on the transmission? Is there any other way? The exhaust manifold nuts are rusted solid. It looks as though the stud will break.
I remember when I broke 2 studs on my Ypipe trying to remove the Ypipe. I had to replace the whole system with Hooker Headers.

Vic
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Old Nov 27, 2006 | 02:52 PM
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Yeah I was thinking about that! A nice time to just put headers on. I'd like to use the car this week though. I'm going to try hooking the cable up, inside the pan. I can reach enough to remove the bolt that holds the cable down on the trans.
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Old Nov 27, 2006 | 04:21 PM
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A few years ago I dropped the front Y to remove my stock headers for porting and had no real problems with getting the nuts off the studs.

Of course I soaked them well with PB Blaster the night before and again about an hour before tackling the job. Still I guess they were not rusted too solidly.

You will run the risk of breaking off the studs if they look very rusted though.

According to my '88 GM Shop Manual it isn't necessay to drop the front Y to remove the TV cable. The diagram shows the TV cable going into the R Rear of the A4.
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Old Nov 27, 2006 | 04:30 PM
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The exhaust pipe runs between the tunnel and trans. pan there, I can just barely reach to turn the bolt out. It's really tight.
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Old Nov 27, 2006 | 04:51 PM
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I see; it's never as easy as in the "book" is it.

Hope you can get the cable changed w/o dropping the exhaust, good luck.
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Old Nov 28, 2006 | 02:49 AM
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Originally Posted by Vic'89
I remember when I broke 2 studs on my Ypipe trying to remove the Ypipe. I had to replace the whole system with Hooker Headers.

Vic
The studs for the stock y pipe are removable on stock manifolds. They can be replaced with new ones. They simply screw onto the bottom of the stock manifolds. A good muffler shop sells them individually.
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Old Nov 28, 2006 | 10:11 AM
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Yeah but if you bust one off you have to drill it out. Or if there is enough of the stud left, weld a new nut on and try to turn it out.

I'm going to try buying a 10MM ratcheting box wrench. I turned the bolt loose but it just won't turn with my finger.
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Old Nov 28, 2006 | 11:24 AM
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Can't think of any reason to change one unless it's broken, but there's plenty of room to drop the pan and access the cable. Does help to have it on a lift, but what operation under the car isn't easier that way? Once the pan is off you can pull on it and make sure it springs back - if so, I'd simply make sure it's adjusted correctly and leave it as is. New fluid and a good gasket makes more sense.
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Old Nov 28, 2006 | 12:25 PM
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It has new fluid and a new gasket. I just put a shift kit in. The TV cable does not adjust, so Pete K said to replace it.
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Old Nov 28, 2006 | 12:32 PM
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What do you mean "doesn't adjust"; the cable head doesn't move outward when you move the throttle to WOT??

The proper way to test operation of and adjustment of the TV valve is to measure line pressure at 1,000rpm & 1,400rpm in "P" and in "D".
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Old Nov 28, 2006 | 01:22 PM
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When I do the adjustment the cable always adjusts fully extended. The shift points are very close together then. If I retract the cable to half way, the car shifts pretty normally. Pete said the cable was worn out and to change it.
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Old Nov 28, 2006 | 02:00 PM
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If it was that way before you installed the shift kit then change it. Otherwise, check your work.
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Old Nov 28, 2006 | 02:59 PM
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Yes it was that way before doing the kit. I had some trouble this fall at an HPDE with the car not shifting correctly.
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Old Dec 25, 2006 | 10:21 PM
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I got the cable changed. I used a pen magnet on the bolt. It was out almost as fast as you could turn it with your fingers. My old cable was bad. I installed the new cable and did the readjustment, it only advanced one or two clicks forward. I was reluctant to button the trans. pan up because I thought it should adjust farther out. But that's all it needed. My stock cable was to worn there to adjust that little. The car is working great!

At my last HPDE the car lost fourth. The valve body got dirty. Also the TV cable extend out to much. It was worn and all the WOT overcame it.

Thanks for the help with these threads.
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