TV linkage is about 3/4 of inch away from the valve. In idle position. The valve was all the way in at wot. The needle for the ball in the valve body is staying up against the ball also. It seems like the needle arm would more likely move with the tv throttling braket. But it don't. Trans isn't going from 2-3 an no 4th. No fragments in pan. No burn smell either. I've been reading and studying this joker for over a wk. Trying to figure out why it won't shift. And I started my trouble shooting at the tps. I noticed this when I flushed the fluid. I checked the tv cable then and because the valve was compressed completely at wop. And there was about 1/2 inch gap I thought it was right. It may have been. I just ain't to sure about this. From what all I've read an heard. Seems like the braket would b close to the valve. I can slide the valve rod out to the braket. Anybody care to help with this.

 

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I never before paid much attention to the TV mechanism needle part. Guess I'll have to go out and pull the pan off my spare 700R-4 tomorrow afternoon. I'll print your post, and see if mine is the same or not.

 

Hey, I appreciate that. I believe it was bent. And the lever should've not been away from the valve that way. Now I'm still learning this 700r or transmissions in general for that matter. But from all I've read the last two wks about em. A tranny is just a big ol hydraulic pump. And this 700r is one of the more tidious of the bunch. In the manner that so many different things effect the way it functions. I know now why they so expensive to have built. Expensive tools!!! The needle on the linkage assembly is a safety. In the event the tv cable, or assembly defects, it will push the ball up and allow consistent pressure to the valve so it don't burn up the trans. It also creates a softer shift. That's how the operator would know. the way I understand it this tv is basically a pressure regulater. And the accelerator governs it. Therfore the lever aught to almost be pushing the valve from the off position. Probably wouldn't hurt if it did. Thanks for the reply.

 

Most everything I've read the last two wks, says that if the tv cable has the plunger all the way in at WOT then its correct. That's not necessarily true. That just means you should have your high pressure. You also gotta make sure your low pressure is correct. Just as important as high pressure is. So is low pressure. Yea, on a track that theory is probably fine. But in everyday driving it's not. Stop and go traffic will burn it up. One can find thread after thread talking about full throttle pressure . But few threads about low pressure points. That's where the geometric on throttle body intake comes in at. Fact is, this transmission 700r" should not be ran without a pressure gauge on it period. U Because there is just to many springs, seals, and switches. just to many kinds of critical elements that can fail. And these kind of mechanisms do fail. Anybody who has this type of tranny would be doing theirselves a favor to install a pressure gage on the dash. I guess that's why the 4l60E done away with the cable. So ppl would keep their meat sticks off of it. Seems folks like to believe that cable is how they suppose to adjust the shift pattern, or just don't know exactly how to set it.
I've almost got it back together. Maybe the rain will stop and I can finally see if I've wasted my time or not. I don't think it's burned up, so I haven't rebuilt it. I burned up 8 or 10 350 an 400 back in the day. They always smelled burnt. This one don't. And knowing about the safety needle. And it was up. I feel more confident. I just basicly tuned up the valve body . And corrected that linkage and put new springs on it. I also because of the constant use. I put in another throttle valve and spring in it. Just for the cause. See what happens.

 

Sorry I wasn't able to follow through, something came up. Just got home an hour ago, but I'm still curious about this, and will check mine tonight.

 

Since you're delving into theory, here's some more: Line pressure gain seems directly linear to throttle opening. So, open the throttle 1/4 of the way, line pressure increases accordingly. But engine torque output isn't necessarily linear. Put a twin 58 MM TB on a 350, 1/4 throttle may well get you more than 50% of the torque that that 350 can make. This is a large part of why TCI created the constant-pressure valve body. And it does wonders for helping a trans survive a big block. But the higher the pressure, the more power it eats, and the more it impacts your MPG. My next 454 / 700R-4 combo is definitely getting the TV cam welded up and re-profiled, for exactly these reasons. Most of us do end up with not enough pressure just above idle. Even when we're adjusted by the common rule. Best to adjust things so that you have full TV when the throttle is only about 90% open, because that last 10% generally doesn't gain anything for most engine combos. Put a twin 48 MM TB on a 502, like GM did, then that last 10% matters. But put a twin 52 MM TB on a 350..