GM Cadillac Deville_Fleetwood_ELD_Seville 1990-1998

Automatic Transmission Assembly

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REMOVAL & INSTALLATION




NOTE
Automatic transmission oil cooler flushing must be performed when an automatic transmission is removed for service. The flushing procedure should be performed after the removal of the old transmission and before the installation of the overhauled or replacement transmission. Failure to flush the system may cause damage to the system and its components.

  1. Raise and safely support the vehicle securely.
  2.  
  3. Remove the shift lever rod from the transmission.
  4.  
  5. Unbolt the shaft coupling bolts. Disengage the propeller shaft from the drive flange using a pry tool, if necessary.
  6.  
  7. Remove the access hole plugs from the oil pan and bell housing.
  8.  



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Fig. Remove the two flex plate-to-torque converter bolt access hole plugs

  1. Remove the flex plate to torque converter bolts.
    1. Mark the flex plate and torque converter so they can be re-assembled in the same position.
    2.  

  2.  
  3. Oil cooler inlet and outlet pipes from the center pipes.
    1. Squeeze the clamps and slide them away from the connection.
    2.  
    3. Slide the pipe hoses from the pipes.
    4.  

  4.  
  5. Detach the oxygen sensor connectors.
  6.  
  7. Remove the catalytic converters.
  8.  
  9. Unbolt the transmission housing to engine oil pan bolts.
  10.  
  11. Install a transmission jack to support the transmission weight.
  12.  
  13. Remove the transmission crossmember.
  14.  



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Fig. Location of the transmission housing to engine oil pan bolts

  1. Lower the transmission to access the transmission to engine bolts.
  2.  
  3. Undo the ventilation hose from the transmission.
  4.  
  5. Detach the electrical connectors.
  6.  
  7. Support the front of the engine.
  8.  
  9. Remove the transmission to engine block bolts.
  10.  
  11. Remove the transmission from the vehicle.
  12.  

To install:



Click image to see an enlarged view

Fig. Cleaning the engine block threaded holes



Clean the transmission oil cooler and pipes, if the transmission is being serviced.
 
Chase the threaded holes in the engine block using a 12 x 1.75 mm tap.
 

ADJUSTMENTS



The Transmission Control Module (TCM) controls the transmission operation in three modes: Economy mode, Performance mode, and Winter mode. The driver determines the transmission operating mode through the Performance/Economy mode switch and Winter mode switch.

Throttle Linkage

The (TCM) receives the throttle position form the PCM. These signal processes within the TCM and several parameter values within the PWM signal separate out. The TCM uses the information on the throttle position to determine the appropriate shift patterns, shift feel and TCC apply and release timing. In general, with greater throttle angle and higher TPS voltage signal, the TCM delays upshift speeds (through force motor solenoid control). In addition, the TCM keeps the converter clutch released at minimum throttle positions and during heavy acceleration.

 
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