Attention. The operations for removing and installing a special automatic transmission are similar to those for removing and installing a manual transmission and are given at the beginning of the chapter. In the following, only operations relating to the special automatic transmission in combination with a 4-cylinder engine are given.
Support the weight of the engine with a hoist using the lugs attached to the cylinder head.
Mark connections C and D (pic. 6.14) and disconnect the electrical connectors A to D from the gearbox.
Unscrew bracket E (pic. 6.14), that secures the wiring harness to the transmission.
Unscrew the oil heat exchanger lines from the engine and gearbox.
Attention. To prevent dirt from entering the pipelines, wrap their ends with adhesive tape or close with suitable plugs.
Unscrew the three nuts securing the torque converter (torque converter) to the master disk. Using a wrench on the crankshaft pulley bolt, turn the engine crankshaft clockwise until one of the torque converter mounting nuts is accessible through the starter hole. Using a screwdriver or a pry bar for the teeth of the flywheel ring gear, fix the drive plate from turning and unscrew the torque converter fastening nut. Turn the crankshaft of the engine and unscrew the remaining two nuts in the same way (see fig. 6.15).
Note. The torque converter is located between the engine and gearbox and is a hydraulic clutch (see fig. 6.16). The hydrodynamic clutch serves to transmit the engine torque through the fluid circulating in their working cavity. This device provides compensation for the difference in the rotational speeds of the engine and transmission, and carry out the transition from a stationary state to movement. The hydrodynamic clutch also allows you to increase the torque. The hydraulic clutch impeller converts the mechanical energy received from the engine into the hydraulic energy of the working fluid (ATF), and the re-conversion back to mechanical energy occurs on the blades of the turbine wheel. The advantages of a fluid coupling include: infinitely variable torque and speed, damping of torsional vibrations, absorption of peak torques and transmission of power without noticeable wear.
Set the selector lever to position «R» and, pulling up, disconnect the transmission control cable from the shaft.
Remove the bolt securing the transmission control cable sheath and remove the cable.
Move the gearbox away from the engine while maintaining the torque converter.
Move the torque converter along the input shaft to the gearbox housing and, using pliers, fix it in this position (see fig. 6.17).
Carefully lower the transmission and remove it from under the vehicle.
Installation
Remove the pliers holding the torque converter to the transmission input shaft.
Screw the torque converter to the drive plate with three nuts and tighten the nuts to a torque of 85 Nm.
Screw in the bolts securing the gearbox to the engine and tighten them to the required torque (see fig. 6.18).
Check that the selector lever is in position «R», and connect the transmission control cable to the transmission shaft.
Fasten and, if necessary, adjust the transmission control cable.
Check the oil level in the gearbox and top up if necessary.
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