TH350 kickdown cable - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-25-2003, 05:52 AM
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TH350 kickdown cable

Hi guys,
I'm trying to adjust the kickdown cable on my TH350 (in a 78 Camaro) and the manual just says "only needs doing when installing a new cable, push accelerator pedal all the way to the floor and it will adjust itself",
I haven't changed the cable, but I have changed the carb and bracket and I can't seem to get the auto box to kickdown.

I'm presuming that there's some sort of mechanism on the cable that comes set at minimum and then when you push the gas pedal all the way open it sets the maximum, is there a way to reset this to minimum to allow me to use the gas pedal to set the new maximum?

Or do I just need to keep adjusting the bracket tighter to get more pull on the cable?

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Old 07-25-2003, 07:18 AM
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Andybird, the new carb and brackets most likely has different geometry than the OEM setup, so you can throw out the book directions. If you do not have enough adequate adjusting range on the cable setup, you will have to change your carb/bracket geometry to get in the range for it to work properly.

Trees
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Old 07-25-2003, 07:59 AM
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With the engine off; hold the throttle to its wide open position. Adjust the kickdown cable so that when the throttle is wide open the cable is fully extended. That's it. ENJOY!!!
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Old 07-25-2003, 03:21 PM
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I've adjusted mine twice. After doing as Frisco said, I took my truck out and tested the kickdown ... I was having to press down further on my pedal than I wanted before it kicked in, so I moved the "stopper" at the end of the kickdown cable (by the carb) a quarter-inch closer and that did the trick.

Alan
54 Chevy Pickup
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Old 07-25-2003, 07:54 PM
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Andy... On the cable where it attaches at the bracket , there is a piece that will release the cable. It is a black plastic piece that you can either push up with your finger or pry it up with a screwdriver. When you release the cable, it will be tighter. Then have someone depress the gas pedal to the floor, and push that piece back down to lock the cable. Some people try doing it by themselves by opening the throttle at the carb. The problem with this proceedure is that often the carb can actually open further than what the pedal will open it. This results in a loose cable and the kick down does not work properly.

Although, ideally it should only have to be done when the cable is replaced, this is not an ideal world. The cables do stretch and it may have been adjusted over the years. Also as said before, the geometry of the carb may make adjustment necessary. And also as has been said before, you can manually make further adjustments. You do take a chance of harming the trans or even the engine, by over reving it by dropping the gear at too high of a speed.

Good Luck
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