GM 476796 CABLE, Throttle Control

To check the Throttle Cable for freeness, pull out on the upper end of the cable a short distance. A light spring resistance should be felt, indicating the presence of a small return spring on the T.V. lever and bracket. Pulling the cable out farther will cause the lever to contact the T.V. plunger and plunger spring, resulting in a greater resistance. Releasing the cable should allow it to return to the zero T.V. position. Whenever the Throttle Cable is disconnected from the carburetor, it must be adjusted upon installation. After connecting the cable to the transaxle, install the cable fitting into the engine bracket and attach the cable terminal to the throttle idler lever. Rotate the throttle idler lever to its 'full travel stop' position to set the automatic choke adjuster correctly, and then release the lever. If readjustment of the Throttle Cable is necessary, depress and hold the metal lock tab, and move the slider back through the fitting away from the throttle idler lever until it stops against the fitting. Release the metal lock tab to disengage the automatic adjuster, and repeat the previous steps.

On all transmissions except the THM-250, THM-350, and THM-400 models, a Throttle Cable controls hydraulic pressures, shift points, shift feel, and downshifting, while the THM-250 and THM-350 utilize a detent cable, and the THM-400 employs an electrical detent switch, which requires separate adjustment. Although the detent cable resembles the Throttle Cable, it solely manages downshift functions, with the distinction in terminology reflecting their different roles rather than their designs. Prior to making adjustments, determine the cable type in your vehicle, either Type One or Type Two. The Type One Cable features a snap-lock assembly integrated with the cable, located next to the cable mounting bracket at the engine, which should be in the locked position for adjustment. The Type Two cable has a different locking mechanism, also positioned similarly, with a lock tab that is set when released and adjusted when pushed downward; earlier models from 1981 can be identified by a visible spring beneath the lock tab, which is absent in 1982 and later assemblies. For Type One, first remove the engine air cleaner assembly, then push up on the bottom of the snap-lock at the cable bracket to ensure the cable can slide freely. Next, move the carburetor lever to the wide open throttle position and hold it there, push the snap-lock flush, and allow the lever to return to the closed position. If this adjustment does not resolve issues with late shifting or lack of part throttle downshift, a qualified mechanic should conduct a transmission fluid pressure test.

To check the Throttle Cable for freeness, pull out on the upper end of the cable a short distance. A light spring resistance should be felt, indicating the presence of a small return spring on the T.V. lever and bracket. Pulling the cable out farther will cause the lever to contact the T.V. plunger and plunger spring, resulting in a greater resistance. Releasing the cable should allow it to return to the zero T.V. position. Whenever the Throttle Cable is disconnected from the carburetor, it must be adjusted upon installation. After connecting the cable to the transaxle, install the cable fitting into the engine bracket and attach the cable terminal to the throttle idler lever. Rotate the throttle idler lever to its 'full travel stop' position to set the automatic choke adjuster correctly, and then release the lever. If readjustment of the Throttle Cable is necessary, depress and hold the metal lock tab, and move the slider back through the fitting away from the throttle idler lever until it stops against the fitting. Release the metal lock tab to disengage the automatic adjuster, and repeat the previous steps.

To check the Throttle Cable for freeness, pull out on the upper end of the cable a short distance. A light spring resistance should be felt, indicating the presence of a small return spring on the T.V. lever and bracket. Pulling the cable out farther will cause the lever to contact the T.V. plunger and plunger spring, resulting in a greater resistance. Releasing the cable should allow it to return to the zero T.V. position. Whenever the Throttle Cable is disconnected from the carburetor, it must be adjusted upon installation. After connecting the cable to the transaxle, install the cable fitting into the engine bracket and attach the cable terminal to the throttle idler lever. Rotate the throttle idler lever to its 'full travel stop' position to set the automatic choke adjuster correctly, and then release the lever. If readjustment of the Throttle Cable is necessary, depress and hold the metal lock tab, and move the slider back through the fitting away from the throttle idler lever until it stops against the fitting. Release the metal lock tab to disengage the automatic adjuster, and repeat the previous steps.