Looking for a measurement TH350 cable.

[HO455]

Can anyone measure how much travel the detent cable (Kick down cable) has? Basically from the bracket to the end of the cable fully extended. Blue arrow to blue arrow at full throttle.

I have just replaced my TH400 with a TH350 and I am unable to get the throttle to open completely with the cable hooked up. I have what appears to be the common Chevrolet small block bracket that bolts to the last 2 bolt on the intake manifold. I have lifted the tab on the new cable and adjusted the cable as far forward as it will go. This only lets the secondaries on the Qjet open about 30%.

I'm starting to believe that maybe the transmission end of the kick down may be the problem. If I knew how much the cable should be able to move I can compare that to mine before I start pulling things apart.

I've got a couple of hours searching for the solution but all the different factory brackets seem to to put the cable at the same distance on the manifold. With all OEM components there isn't any reason I can see why this isn't working properly. Last photo is the bracket style I have installed.

[yuccales]

Obviously our throttle linkage is different, but maybe you can find a reference point.(coil bracket, valve cover bolt?)

1st pic is measured from center of TV bolt.
2nd pic is wot. 8 inches.
3rd pic is at idle, about 6 and 3 quarters of an inch.
4th pic is secondary plates wide open. (bad pic I know)

[HO455]

Thank you for taking the time to do this I appreciate it. It looks like your getting 1 and 3/4 inch of movement from the cable.

[yuccales]

Originally Posted by HO455

Thank you for taking the time to do this I appreciate it. It looks like your getting 1 and 3/4 inch of movement from the cable.

Hope it helps.

[HO455]

Originally Posted by yuccales

Hope it helps.

When it quits pouring rain I will go out and see what I can figure out.

[AussieinNC]

Th350 is a detent cable only, not a pressure feed cable for line pressure like a 700R4.

Take detent cable off the carb and slowly pull it out, you should feel the lever in the trans push the valve in, then a little more pressure to get to the last cable out position.
If you can feel the valve move, the cable is most likely not installed correctly inside the trans.

Have someone hold the accelerator fully open and pull the detent cable fully out.

You should be able to slip the end of the detent cable onto the pin on the carb throttle plate.

I have seen folk not put the square end of the cable fully into the square hole in the bracket...it must fully seat inside the bracket.

I have also seen the inner cable out too far in the square connector base....push on the tab on side of the square block and push the inner cable towards the front. this should let you now connect the detent cable...

To set it...have someone push gas pedal to floor, then pull outer detent cable backwards to remove all slack in the inner cable.

Pics of your setup will help

[bigmac73]

there should be a tab you can pull up and adjust the cable length that travels through on the square part that is next to bracket.

[bigmac73]

never mind I see you have tried that already

[HO455]

Originally Posted by bigmac73

never mind I see you have tried that already

Yes. I have the spring part of the adjustment mechanism squeezed together as tight as it can go. And still not enough movement to get full throttle.