Transmission throttle valve adjustment

[Doorkicker]

727 and using a cable system to the carb for TV to transmission. Everything I'm reading speaks to making adjustments with stock TV rods.

The way I have it currently adjusted is I've set the maximum TV to be at full throttle. But I'm not sure that is the correct ratio. It's not shifting very well.

Basically what is the ratio I should be looking for? For example should the TV cable be engaging the valve early in the throttle position or later in the throttle position?

 

[beanhead]

If you have it set for full pull at full throttle and don't like it, you're just gonna have to play with it a little to find the sweet spot, I know, that's what she said lol....seriously though just back it off a little bit at a time and test. You'll know you went too far the other way if it fails to kick down at pedal-to-the-floor (or you have to go nearly TO the floor if you have a part-throttle valve body). I just don't think there's any set rule as to where to end up with a cable setup.

 

[dvw]

From the results I've seen with throttle pressure cable vs linkage there always seems to be a lot of trouble getting then to function as intended. This is my 2 cents Full back on the lever will give the highest line pressure. If it shifts where you like it at wide open throttle, then that part of the adjustment is correct. If it shifts incorrectly at part throttle with a factory stock valve body and governor? Then the pivot ratio at the carb vs the lever at the transmission is incorrect. The early portion of lever movement doesn't even more the throttle pressure valve in the transmission. You can feel the looseness in the lever when moving it by hand. The pivot point distance between the carburator throttle shaft and cable attaching point may be to close or to far away. The same adjustment can be made at the throttle pressure lever at the transmission itself. Making this change will result in early or later part throttle pressure. Replicating the factory pivot point distances will result in factory shift points. Beyond that either valve body or governor changes need to be made. Aftermarket carburators don't always attach at the factory pivot distance. There is more than one throttle pressure arm style from the factory as well. So after over 60 years the part match may not be correct.
Doug