I've been running my Stage 2 modified 700R4 for several years now without a hint of trouble (save for bit of trash that got stuck in the TCC solenoid passage and disabled the lock up functon).
I have all the geometry correction linkages attached to my 4150 style Holley carb however I've never been able to get ratchet function out the cable adjuster. That said, with little or no extension on the jacket (for lack of a better description) I still have good shift function and I beat on the transmission at the track on a regular basis.
My question concerns the TV cable adjustment and how it relates to line pressure within the transmission. Is line pressure increased or decreased with the extension of the jacket at the carb linkage? Step on the throttle with the jacket fully retracted and it ratchets out a certain amount to set the cable adjustment. That's following the prescribed procedure in the GM service manual as well as consistent advice here in the forum.
Any insight is appreciated. I'm not looking for a lesson on how to make the adjustment, but more specifically what the adjustment does.

 

If you were to adjust it so that the TV cable itself was all the way out of it's jacket at half throttle, then you would have maximum line pressure at half throttle. This might be fine if granny was driving a stock 454, and didn't mind violent shifting. But the shifts should be late.
If you could adjust it opposite, then you'd never have full line pressure, even at WOT. This would lead to slippage. It should shift softly, the way most grannies expect. But it should shift early.

 

That said, then it's best to make an error in adjustment with the jacket more extended than the other way around, correct?
The reason I ask is that in this particular setup, for whatever reason, there is no action with respect to the jacket extending. I've done dozens of these, in many applications and have always had some level of adjustment and excellent shift manners.
This trans has a host of mods including the .500" boost valve, modified valve body, etc, etc and I've had no issues with shifting either while driving like "granny" or at the drag strip.
It just got me to wondering. I've had the jacket pulled out slightly (despite having zero adjustment the conventional way) and have had no trouble. Burning up transmissions is not something I enjoy doing (and I've fried a couple, TV cable adjustment notwithstanding).

 

Just set the jacket so that the cable cannot extend any further when the throttle is wide open. That way you don't limit how far the throttle can open, but you'll have maximum available line pressure when you are at WOT.

 

if you wanted to invest more TCI makes a kit that eliminates TV cable adjustments then using it for a kick down only.Constant line pressure is 200.

 

That's interesting!
I'll look into it.
Thanks.

 

Read through these guys' "TV 101" article and investigate your transmission in comparison. http://www.tvmadeez.com/

 

Good read so far. I'm heading out to the driveway to check on a few details.
Thanks sofa.

 

Hmmm. Interesting development.
Having read the article and performed one of the preliminary tests I find that I'm WAY out of spec. At WOT (either by hand or via the gas pedal) I still have consideable slack on the inner TV cable. Using pliers, I'm able to extend the cable about 3/8ths of an inch.
It may be just good fortune that this trans hasn't cooked already. Perhaps the mods to the various boost valves have spared me.
Time for some bracket modifications and some line pressure testing.
Great article!

 

I used their TVMadeEZ kit on my Edelbrock carb- it was the 3rd or 4th and final kit I tried, and it actually solved all my drivability issues and concerns. The pressure gauge is $$ well spent IMHO.

 

In doing some trouble shooting, I found under WOT there was still about 3/8ths of an inch of cable still available to be pulled out of jacket. That would explain the no ratchet condition during cable adjustment.
Despite having all the "correct" parts from Holley (thumbnails) for cable geometry there was still not enough adjustment available. I modified the the throttle/TV cable bracket to allow for increased adjustment (increased the distance from the throttle lever to cable jacket attachment point) and now have the ratcheting function of the TV cable.
Thing is now, the shift RPM is in excess of 4000 rpm when cruising. I had to draw the cable jacket out of the adjuster another two "teeth" to get some kind of drivability.
I will say that compared to what it was like before I modified the bracket is night and day (and it was reasonable if not spectacular before) however it still has me puzzled.
I'm going to buy a new TV cable for a carbed V8 Camaro (82-84) to see if that may change the adjustment characteristics.