Removing the automatic transmission for repair as well as for replacement.
Main defects requiring removal of the automatic transmission:
- leakage of working fluid through seals and gaskets;
- difficulty in shifting gears;
- excessive noise;
- spontaneous disengagement or imprecise engagement of gears.
The gearbox is also removed to replace the rear crankshaft oil seal of the engine.
It is advisable to remove the gearbox with an assistant, as the gearbox is heavy.
In practice, the work of removing the gearbox is similar to removing a manual gearbox (described in the article – Removal and installation of the manual gearbox), but with the following differences.
The automatic transmission is controlled by a single cable, not two as in the manual gearbox.
To disconnect from the gearbox, remove the cable end 2 from the ball pin of the multifunction switch lever, overcoming the resistance of the clip.
Rotate the two halves of the sleeve 1 in the directions shown by the arrows in the figure.
Withdraw the sleeve from the bracket on the gearbox and move the cable aside.
Between the halves of the sleeve a yellow plastic spacer ring is fitted.
Do not remove this ring.
If it breaks, the sleeve can be fitted without it – this will not affect the operation of the drive.
A heat exchanger 1 (figure) is fitted on the gearbox, serving to cool the oil in the automatic transmission.
The engine cooling system hoses are connected to its unions.
Before removing the automatic transmission, drain the coolant (article – Checking and replacing the engine coolant).
Disconnect the hoses of the heat exchanger 2.
Disconnect the wiring harness connector from the electronic control unit of the gearbox, sliding out its clip.
Remove the engine starter.
Through the window that opens after removing the starter, undo the three nuts securing the torque converter to the drive plate, turning the crankshaft via the auxiliary drive pulley bolt for access to them and holding the plate against rotation with a mounting lever.
The torque converter securing nuts must not be reused.
The torque converter is not secured in any way against longitudinal displacement on the planetary gear shaft, so when removing the gearbox be careful – do not allow the converter to slip off the shaft.
After removing the gearbox, tie the torque converter to the gearbox with wire or by another method.
Refit the automatic transmission in reverse order.
