Chevrolet Nova/ChevyII 1962-1979

Neutral Safety Switch

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REMOVAL & INSTALLATION





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Fig. Fig. 1 Neutral safety switch removal and installation

The neutral safety switch prevents the engine from being started in any transmission position except Neutral or Park. The switch is located on the upper side of the steering column under the instrument panel on column shift cars, and inside the shift console on floor shift models.

  1. Remove the console for access on floor shift models.
  2.  
  3. Disconnect the electrical connectors.
  4.  
  5. Remove the neutral switch.
  6.  
  7. Place 1962-70 column shift lever models in Drive, and 1971 and later models in Neutral. Locate the lever tang against the transmission selector plate on column shift models. Place 1962 through early 1972 floor shift models in Drive, and mid-1972 and later models in Park.
  8.  
  9. Align the slot in the contact support with the hole in the switch. Insert a 3 / 32 in. diameter pin through the aligned slot and hole. The switch is now aligned in Drive position.
  10.  

1973 and later neutral safety switches have a shear-pin installed to aid in proper switch alignment so that insertion of a pin is unnecessary. Moving the shift lever from Neutral shears the pin.

  1. Place the contact support drive slot over the drive tang. Install the switch mounting screws.
  2.  
  3. Remove the aligning pin. Connect the electrical wiring, and replace the console.
  4.  
  5. Set the parking brake and hold your foot on the service brake pedal. Check to see that the engine will start only in Park or Neutral.
  6.  

ADJUSTMENTS



There are no band adjustments possible or required for the Turbo Hydra-Matic 350 or 400.

Low Band
POWERGLIDE

The low band must be adjusted at the first required fluid change or whenever there is slippage.

  1. Position the shift lever in Neutral.
  2.  
  3. Remove the protective cap from the adjusting screw on the left side of the transmission.
  4.  
  5. Loosen the locknut 1 / 4 turn and hold it with a wrench during the entire adjusting procedure.
  6.  
  7. Tighten the adjusting nut to 70 inch lbs, using a 7 / 32 Allen wrench.
  8.  
  9. Back off the adjusting nut exactly three turns for a band used less than 6,000 miles. Back off exactly four turns for a band used 6,000 miles or more.
  10.  
  11. Torque the locknut to 15 ft lbs and replace the cap.
  12.  

Intermediate Band
TURBO HYDRA-MATIC 250

The intermediate band must be adjusted with every required fluid change or whenever there is slippage.

  1. Position the shift lever in Neutral.
  2.  
  3. Loosen the locknut on the right side of the transmission and tighten the adjusting screw to 30 inch lbs.
  4.  
  5. Back the screw out three turns and then tighten the locknut to 15 ft. lbs.
  6.  

 
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