Chevrolet Full Size Cars 1979-1989

Transmission

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REMOVAL & INSTALLATION





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Fig. Fig. 1 Use a torque converter holding fixture (or a C-clamp) to keep the converter from falling during transmission removal



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Fig. Fig. 2 Common transmission attachment net hold design

  1. Open the hood and place protectors on the fenders, then disconnect the negative battery cable.
  2.  
  3. Remove the air cleaner assembly and cover the air intake for protection.
  4.  
  5. Disconnect the detent cable at its upper end.
  6.  
  7. Remove the transmission oil dipstick, and, if accessible, the bolt holding the dipstick tube.
  8.  
  9. Raise and support the vehicle safely using jackstands.
  10.  

If a floor pan reinforcement is used be sure it does not interfere with driveshaft removal. If interference if found, remove the reinforcement.

  1. Disconnect the speedometer cable at the transmission.
  2.  
  3. Disconnect the shift linkage at the transmission.
  4.  
  5. Remove the driveshaft assembly from the transmission.
  6.  
  7. Disconnect all electrical leads at the transmission and any clips that hold these leads to the transmission case.
  8.  
  9. Remove the flywheel cover and matchmark the flywheel and torque converter for later assembly.
  10.  
  11. Remove the torque converter-to-flexplate bolts and/or nuts.
  12.  
  13. On gasoline engine cars, disconnect the catalytic converter support bracket.
  14.  
  15. Remove the transmission support-to-transmission mount bolt and transmission support-to-frame bolts, and any insulators (if used).
  16.  
  17. Position the transmission jack under the transmission and raise it slightly.
  18.  
  19. Slide the transmission support rearward.
  20.  
  21. Loosen the transmission enough to gain access to the oil cooler lines and detent cable attachments.
  22.  
  23. Disconnect the oil cooler lines and detent cable. Plug all openings.
  24.  
  25. Support the engine and remove the engine-to-transmission bolts.
  26.  
  27. Disconnect the transmission assembly, being careful not to damage any cables, lines or linkage.
  28.  
  29. Install a C-clamp or torque converter holding tool onto the transmission housing in order to hold the converter to the housing. Carefully lower the transmission assembly from the vehicle (a hydraulic floor jack is best for this).
  30.  

To install:

  1. With the torque converter held in position, carefully raise the transmission into position. Install the transmission-to-engine bolts and tighten to 35-40 ft. lbs. (47-54 Nm).
  2.  
  3. Connect the detent cable or linkage, then remove the plugs and connect the oil cooler lines.
  4.  
  5. Slide the transmission support into position.
  6.  
  7. Install the transmission support-to-transmission mount bolt and transmission support-to-frame bolts along with any insulators (if used).
  8.  
  9. On gasoline engine cars, connect the catalytic converter support bracket.
  10.  
  11. Make sure the weld nuts on the converter are flush with the flexplate and that the converter rotates freely by hand. Align the matchmarks made earlier and hand thread the torque converter-to-flexplate retaining bolts. Once the bolts are threaded, tighten them to 35 ft. lbs. (47 Nm). Re-tighten the first bolt torqued.
  12.  
  13. Install the flywheel cover.
  14.  
  15. Connect all electrical leads at the transmission and any clips that hold these leads to the transmission case.
  16.  
  17. Install the driveshaft assembly to the transmission.
  18.  
  19. Connect the shift linkage to the transmission.
  20.  
  21. Connect the speedometer cable to the transmission.
  22.  
  23. If removed, install the floor pan reinforcement.
  24.  
  25. If access was not possible from above the vehicle, install the transmission dipstick guide tube using a new oil seal.
  26.  
  27. Connect the detent cable at its upper end.
  28.  
  29. Check and adjust the shift and throttle linkage, as necessary. Refer to the adjustment procedures found earlier in this section.
  30.  
  31. Remove the jackstands and carefully lower the vehicle.
  32.  
  33. If not done already, install the transmission dipstick guide tube using a new oil seal.
  34.  
  35. Install the transmission dipstick.
  36.  
  37. Remove the protective cover, then install the air cleaner assembly.
  38.  
  39. If drained, fill the transmission assembly with the proper type and amount of transmission fluid.
  40.  
  41. Connect the negative battery cable, then check and add fluid, as necessary.
  42.  

 
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