Different automatic transmissions require the use of various methods when adjusting their kickdown cables. To adjust the kickdown cable on a Turbo 350, first remove the air cleaner, and then loosen the lock-nut. Adjust the kickdown cable before tightening the lock-nut into place again.
Take precautionary measures by parking the car in a safe place away from traffic with the engine off and allowing it to cool. Disconnect the negative terminal cable, and put the car on emergency brakes. Remove the car's air cleaner, and locate the throttle lever on the carburetor. There are two cables. One cable, the throttle cable, makes contact with the throttle lever, while the other cable, the kickdown cable, is on the lower side.
Using an adjustable wrench, turn the lock-nut to loosen the kickdown cable, and the assistance of another person to depress and hold the accelerator pedal to the floor. Grab the kickdown cable's steel shoulder, and turn it counterclockwise until the cable extends fully, but leave some slack to prevent the cable from breaking while depressing the accelerator pedal.
Use the adjustable wrench to tighten the lock-nut. Keep checking the slack to make sure the cable is well adjusted, and then replace the air filter.