Nissan Z - ZX 1970-1988 Repair Guide

Adjustments

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BANDS



Each automatic transmission is equipped with one or more bands. The exact number if bands is dependant upon the vehicle production year and transmission model.

Primary Brake Band

This adjustment is not required under normal automatic transmission service. Proceed with this adjustment if shifting problems are encountered.

1970-83 MODELS

See Figure 1

The primary brake band in located upper corner opposite the transmission filter. It is most easily identified by the locknut.

  1. Refer to the Fluid Pan, Removal and Installation procedures, in this section and remove the fluid pan..
  2.  
  3. Loosen the locknut on the piston stem.
  4.  



Click image to see an enlarged view

Fig. Fig. 1: Brake band and locknut(arrowed)

  1. Tighten the piston stem to 9-11 ft. lbs. (12-15 Nm).
  2.  
  3. Loosen the piston stem exactly two turns.
  4.  


WARNING
When loosening the piston stem, DO NOT back it off too far, for the anchor block may fall out of place.

  1. Hold the stem and tighten the locknut to 14 ft. lbs. (20 Nm). If the stem turns when the locknut is tightened, loosen the locknut and repeat the adjustment.
  2.  
  3. Replace the fluid pan and refill the transmission.
  4.  

1984-88 MODELS
  1. Refer to the Fluid Pan, Removal and Installation procedures, in this section and remove the fluid pan..
  2.  
  3. Loosen the locknut on the piston stem exactly three turns.
  4.  
  5. Tighten the piston stem to 9-11 ft. lbs. (12-15 Nm).
  6.  
  7. Loosen the piston stem exactly two turns.
  8.  


WARNING
When loosening the piston stem, DO NOT back it off too far, for the anchor block may fall out of place.

  1. Hold the stem and tighten the locknut to 14 ft. lbs. (20 Nm). If the stem turns when the locknut is tightened, loosen the locknut and repeat the adjustment.
  2.  
  3. Replace the fluid pan and refill the transmission.
  4.  

2nd Brake Band

The E4N71B transmission is equipped with a 2nd brake band. This band is located in the same position as the primary brake band of the 3N71B model transmission.

1984-88 MODELS

See Figure 1

  1. Refer to the Fluid Pan, Removal and Installation procedures, in this section and remove the fluid pan..
  2.  
  3. Loosen the locknut on the piston stem.
  4.  
  5. Tighten the piston stem to 9-11 ft. lbs. (12-15 Nm).
  6.  
  7. Loosen the piston stem exactly three turns.
  8.  


WARNING
When loosening the piston stem, DO NOT back it OFF too far, for the anchor block may fall out of place.

  1. Hold the stem and tighten the locknut to 14 ft. lbs. (20 Nm). If the stem turns when the locknut is tightened, loosen the locknut and repeat the adjustment.
  2.  
  3. Replace the fluid pan and refill the transmission.
  4.  

Overdrive Brake Band

The overdrive brake band is located at the underside of the overdrive unit, which is the section between the transmission case and the convertor housing. Only the E4N71B model transmission is equipped with an overdrive band.

1984-88 MODELS

See Figure 2

  1. Raise and support the vehicle on jackstands.
  2.  
  3. At the overdrive section, remove the overdrive servo cover.
  4.  
  5. Loosen the overdrive piston stem locknut.
  6.  



Click image to see an enlarged view

Fig. Fig. 2: Use an open-ended wrench and torque wrench to adjust the overdrive brake band-1984-88 models

  1. Tighten the overdrive piston stem to 5.1-7.2 ft. lbs. (7-10 Nm), then back it off exactly two turns.
  2.  
  3. Holding the piston stem in position, tighten the locknut to 11-29 ft. lbs. (15-39 Nm).
  4.  
  5. Install the overdrive servo cover. Tighten the cover-to-overdrive case to 7-11 ft. lbs. (10-15 Nm).
  6.  

SHIFT LINKAGE



1970-72 Models

See Figure 3

  1. Loosen the trunnion locknuts at the lower end of the control lever. Remove the selector lever knob and console.
  2.  
  3. Place the transmission selector in N and place the transmission shift lever in the NEUTRAL position by pushing it all the way back, then moving it forward two stops.
  4.  



Click image to see an enlarged view

Fig. Fig. 3: Transmission control linkage-1970-72 models

  1. Check the vertical clearance between the top of the shift lever pin and transmission control bracket. It should be 0.02-0.06 in. (0.5-1.5mm). Adjust the nut at the lower end of the selector lever compression rod, as necessary.
  2.  
  3. Check the horizontal clearance between the shift lever pin and transmission control bracket. It should be 0.02 in. (0.5mm). Adjust the trunnion locknuts as necessary to get this clearance.
  4.  
  5. Replace the console with the shift pointer correctly aligned. Install the shift knob.
  6.  

1973-78 Models

See Figure 4

  1. Loosen the adjusting nuts B.
  2.  
  3. Set both the transmission control lever and the range selector lever in the NEUTRAL position.
  4.  
  5. Tighten the adjusting nuts so that they both just touch the trunnion 2.
  6.  



Click image to see an enlarged view

Fig. Fig. 4: Transmission control linkage-1973-78 models

  1. Tighten the nuts. Test the shifter for proper operation.
  2.  

1979-83 Models

Adjustment is made with the locknuts at the base of the shifter, which control the length of the shift control rod.

  1. Place the shift lever in DRIVE.
  2.  
  3. Loosen the locknuts, then move the shift lever until it is firmly in the DRIVE range, the pointer is aligned and the transmission is in DRIVE range.
  4.  
  5. Tighten the locknuts.
  6.  
  7. Check the adjustment. Start the vehicle and apply the parking brake. Shift through all the ranges, starting in PARK. As the lever is moved from PARK to 1 you should be able to feel the detents in each range. If proper adjustment is not possible, the grommets are probably worn and should be replaced.
  8.  

1984-88 Models

If the detents cannot be felt or the pointer indicator is improperly aligned while shifting from the PARK range to range 1, the linkage should be adjusted.

  1. Place the shifter in the NEUTRAL position.
  2.  
  3. Loosen the locknuts.
  4.  
  5. Move the range selector lever at the transmission to the NEUTRAL range.
  6.  
  7. Tighten the locknuts when the floor control lever is in the NEUTRAL range and pushed against the PARK range side.
  8.  
  9. Shift the control lever through the different ranges to make sure it shifts smoothly and without any sliding noises.
  10.  

CHECKING KICKDOWN SWITCH AND SOLENOID



See Figure 5

  1. Turn the key to the normal ON position and depress the accelerator all the way. The solenoid in the transmission should make an audible click.
  2.  



Click image to see an enlarged view

Fig. Fig. 5: Location of the kickdown solenoid

  1. If the solenoid does not work, inspect the wiring and test it electrically to determine whether the problem is in the wiring, the kickdown switch or the solenoid.
  2.  

If the solenoid requires replacement, drain slightly over 2 pts. (1 liter) of fluid from the transmission before removing it.

 
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