Throttle Valve cable adjustment

Daron

Active member
Some folks on the list were getting confused with the TV adjust procedure. I hijacked the following to illustrate how it goes:

tvrise.gif


The Throttle Valve Cable is attached to the throttle linkage. When the throttle is depressed, the cable is "pulled" progressively with throttle position. In addition to providing forced downshifts (kickdown), and progressively later (higher speed) upshifts at higher throttle settings, the throttle valve also adjusts main line pressure in the transmission. Operating a transmission with the TV cable out of adjustment, can, not only produce early, or late upshifts, but incorrect line pressure, as well. What this means, in simple terms, is that TV pressure that is too low, will produce main line pressure that is also too low, and will eventually "burn" the transmission clutches.

To adjust, on the throttle linkage you will have three things attached if you have cruise, two if not. One of them is of course for the gas, the one that is for the cruise control has a long slot in it (if you have cruise control), and the other is the TV cable (which is actually a cable), this is the one you need to adjust.

With close inspection you will see it has a sort of D shaped button you can depress and slide the sleeve (cable housing) back and forth. The sleeve is what you want to adjust, by depressing the button. Press the D button and slide the sleeve toward the drivers side wheel as far as it will go and let go of the button. Now open the throttle to the wide open position and release. You should be able to hear the sleeve click (rachet) as it slides through the cable housing. Make sure that the cable returns (with no binding) when the throttle is released.


Hope that helps
 

jwaller

Evil Genius/SyTy Guru
listen to the ole wise man....he knows what he's taliking about...sometimes. :smile: :grin:
 

mrweelr

New member
I think I adjusted mine incorrectly because when my truck shifts from 1st to 2nd, it lurches really hard. In fact, it's shifting way to abruptly for me - feels like a delayed shift. When I adjusted it before, I slid the sleeve all the way toward the driver's side and then pushed on the gas pedal all the way. I'm going to try again by rotating the throttle assembly by hand and listening to the number of clicks. Does anyone know exactly how many clicks is correct?
 

JoeLutz

New member
mr wheeler,
Don't count clicks, just rotate the throttle as far as it will go by hand and the cable will pull through to where it needs to be. If it still shifts too hard, then bring it in another notch. It is supposed to be a firm shift though.
Daron,
You are one sick animal lover :grin:

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<font size=-1>[ This Message was edited by: joeelutz on 2002-01-04 17:35 ]</font>
 

mrweelr

New member
I played with the TV cable some more and I fixed the hard shifts. Pulled the sleeve in two more clicks and now it shifts beautifully. No more 1-2 shift that feels like I'm getting rear ended at 5 mph every time! I noticed it doesn't kickdown as easily anymore either which was a problem before. The truck would downshift at the slightest push of the throttle. Now it feels just right. Thanks for posting this tip Daron.


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Jeremy
SY#434
Santa Clara, CA

<font size=-1>[ This Message was edited by: mrweelr on 2002-01-07 22:30 ]</font>
 
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