GM Corvette 1963-1982 Repair Guide

Shift Linkage

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ADJUSTMENT 1963-67 Powerglide Transmissions



See Figure 1

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Fig. Fig. 1: View of the shift linkage for Powerglide transmissions

All Powerglides are adjusted in the same manner, although the shift pattern was changed in 1965 from the staggered pattern of 1963-64 to a straight pattern.

  1. Disconnect the control rod from the shift lever.
  2.  
  3. Position both the shift lever and the control rod bell crank in Park, then loosen the clevis locknut and rotate the rod until it freely enters the shift lever.
  4.  
  5. Secure the rod to the shift lever and lock the clevis nut.
  6.  

1968-72 Turbo Hydra-Matic Transmissions See Figure 2

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Fig. Fig. 2: Shift linkage adjustment-1968-72 Turbo Hydra-Matic transmissions

  1. Disconnect the pushrod at the transmission lever.
  2.  
  3. With the transmission lever in Drive detent and the selector lever in Drive, rotate the pushrod until the hole lines up with the lever pin.
  4.  
  5. Install the pushrod on the pin and install the retainer clip.
  6.  
  7. Check operation of the linkage in all positions.
  8.  

1973-77 Turbo Hydra-Matic 400 Transmissions See Figure 3

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Fig. Fig. 3: View of the shift linkage adjustment procedure-1973-77 Turbo Hydra-Matic transmissions

  1. Loosen the nut on the transmission lever so that the pin can move in the slot. Remove the console cover.
  2.  
  3. Move the transmission lever counterclockwise to the L1 position and then clockwise five detents to Park.
  4.  
  5. Place the shift lever in Park and insert a 0.40 in. spacer in front of the pawl.
  6.  
  7. Tighten the nut on the transmission lever to 20 ft. lbs.
  8.  
  9. Turn the ignition switch to LOCK with the shift lever in Park.
  10.  
  11. Remove the cotter pin and washer from the backdrive cable at the column lever. Disconnect the cable.
  12.  
  13. Working under the dash, remove the two nuts at the steering column-to-dash bracket.
  14.  
  15. Turn the lock tube lever counterclockwise (when viewed from the front of the column) to remove any free-play from the column.
  16.  
  17. Move the bracket until the cable eye passes freely over the retaining pin on the bracket.
  18.  
  19. While holding the bracket in place, have an assistant tighten the bracket retaining nuts.
  20.  
  21. Install the cotter pin and washer to retain the cable to the lever retaining pin.
  22.  

1978-81 Turbo Hydra-Matic 350 Transmissions See Figure 4

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Fig. Fig. 4: Turbo-Hydramatic shift linkage adjustment-1978-82 vehicles

  1. Loosen the screw from the swivel so the rod moves within the swivel.
  2.  
  3. Put the transmission control lever in drive (D), and loosen the nut so that the pin moves in the slot of the transmission lever.
  4.  
  5. Position the transmission lever in the "Drive" position by moving the lever counterclockwise to the L1 detent and then clockwise three detent positions to "Drive."
  6.  
  7. Tighten the nut to 20 ft. lbs.
  8.  
  9. Position the transmission control lever in the park (P) position and the ignition switch in the LOCK position.
  10.  
  11. Pull down on the rod slightly against the lock stop and tighten the screw to 20 ft. lbs.
  12.  

1982 Transmissions See Figure 4

  1. Raise the vehicle and support it safely with jackstands.
  2.  
  3. Disconnect the transmission control cable at the transmission lever. Rotate the transmission lever clockwise to the last detent position.
  4.  
  5. Push the shifter lever as far forward as possible, in the Park position.
  6.  
  7. Check the alignment of the control cable hole against the transmission lever stud. If the cable hole aligns with the stud, attach the cable with the washer and retaining pin; the adjustment is okay. If the stud and hole do not align, loosen the stud mounting nut and slide the stud as necessary to align it with the cable hole. Tighten the stud nut and attach the cable with the washer and retaining pin.
  8.  
  9. Lower the vehicle.
  10.  

 
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