Repair Pontiac Mid-size 1974-1983 Repair Guide

Transmission Assembly



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Fig. Fig. 1 Transmission oil cooler line mounting-gasoline engines

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Fig. Fig. 2 Diesel engine transmission oil cooler line routing

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Fig. Fig. 3 Install a torque converter holding tool onto the transmission housing to hold the converter in place

This procedure covers both gasoline and diesel engine vehicles.

  1. Open the hood and place protectors on the fenders. Remove the air cleaner assembly.
  3. Disconnect the detent cable at its upper end.
  5. Remove the transmission oil dipstick, and the bolt holding the dipstick tube if it is accessable.
  7. Jack up the car and safety support it with jackstands.

If a floor pan reinforcement is used, remove it if it interferes with driveshaft removal or installation.

  1. Disconnect the speedometer cable at the transmission.
  3. Disconnect the shift linkage at the transmission.
  5. Tag and disconnect all electrical leads at the transmission and any clips that hold these leads to the transmission case.
  7. Remove the flywheel cover and matchmark the flywheel and torque converter for later assembly.
  9. Remove the torque converter-to-flywheel bolts and/or nuts.
  11. On gasoline engined cars, disconnect the catalytic converter support bracket.
  13. Remove the transmission support-to-transmission mount bolt and transmission support-to-frame bolts, and any insulators (if used).
  15. Position a transmission jack under the transmission and raise it slightly.
  17. Slide the transmission support rearward.
  19. Loosen the transmission enough to gain access to the oil cooler lines and detent cable attachments.
  21. Tag and disconnect the oil cooler lines and detent cable. Plug all openings.
  23. Support the engine and remove the engine-to-transmission bolts.
  25. Disconnect the transmission assembly, being careful not to damage any cables, lines or linkage.
  27. Install a C-clamp or torque converter holding tool onto the transmission housing to hold the converter in the housing. Remove the transmission assembly from the car (a hydraulic floor jack is best for this).
  29. To install, reverse the removal procedure. When installing the flex plate-to-converter bolts, make sure that the weld nuts on the converter are flush with the flex plate and that the converter rotates freely by hand. Hand-start the three bolts and tighten them finger-tight, then torque them evenly.

Install a new oil seal on the oil filler tube before installing the tube. Tighten the flywheel-to-converter bolts to 35 ft. lbs. Tighten the transmission-to-engine bolts to 35 to 40 ft. lbs. Adjust the shift linkage and detent cable following the procedures in this section, and check the transmission fluid if the transmission was not drained previously.