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Complete gearbox, A20NFT/LHU

Complete gearbox, A20NFT/LHU

To remove


1. Place covers over the wings to keep the paintwork clean and protect it from damage.

2. Remove the upper engine cover.

3. Remove the battery cover.

4. Remove the cooling pipe (A), bonnet switch connector (B), fuse box (C) and battery (D).


5. Remove the battery tray (A).


6. Unplug the control module connector (A).


7. Remove the gear cable (B) from the selector lever arm. The selector lever must be in position N.

8. Remove the cable from the cable retainer by pulling back the locking sleeve (C).

9. Remove the upper bolts (A) of the transmission casing. For simpler dismantling, use 87 92 723 Access tool, bolt in joint between automatic transmission and engine .


10. Lift off the expansion tank from its holder and fit 83 96 178 Lifting eyes, A20NFT/LHU (A) onto the engine.



11. Fit 83 94 850 Lifting beam with 83 95 287 Holder. Replace the holder's lifting hooks. Unload the engine and gearbox.


12. 4WD: Remove Transfer case, A20NFT/LHU .

13. Remove the front torque rod bracket (A).


14. Remove the starter motor's electrical connectors (A) and the starter motor (B).


15. Remove the 6 bolts (A) holding the torque converter to the driver plate. Turn the crankshaft clockwise with the centre bolts on the belt pulley.


16. Detach the transmission fluid cooling hoses (A) and plug the holes and hoses with 82 92 955 Plugs, spare part kit .


17. Detach the ABS cable from the clip (A) and undo the left drive shaft using 87 92 616 Removal tool, drive shafts .


18. Suspend the shaft by means of a cable tie (B).

19. Remove the lower gearbox bolts (A). Leave one bolt in place.


20. Lower the car, mark the location of the bolts on the left engine mounting with a marker pen to ensure correct refitting and then remove the bracket screws (A) from the mounting.


21. Lower the power train with the lifting beam to facilitate removal of the transmission.

22. Raise the car. Fit 87 92 608 Holder for single-column lift on a column jack. Adjust and fasten the tool in the gearbox as illustrated. Use the M12 holes for the torque rods.


23. Remove the last screw.

Important

The jack can tip over. Be careful.


24. Pull out the gearbox about 10 mm.

25. Remove the plug and press the torque converter towards the transmission and fit 87 92 574 Holder for holding the torque converter in place while removing the transmission.


26. Pull out and let down the gearbox.

27. Lift the transmission down from the column jack with an engine lift and 87 92 442 Lifting cable while undoing the lifting tool from the transmission.

28. Plug the holes for the drive shafts if the transmission is to undergo transport.


To fit


1. Turn the torque converter so that the screw holes align with the holes on driver plate. Fit 87 92 574 Holder (A) to hold the torque converter in place during assembly.


2. Check that the two locating sleeves are attached to the engine and add anti-corrosion agent onto the locating sleeves. Fit a new drive shaft seal on the left-hand side, lubricate it before assembly. Use 87 92 657 Fitting drift, drive shaft seals .

3. Lift up the transmission with an engine lift and 87 92 442 Lifting cable .

4. Fit 87 92 608 Holder for single-column lift onto a column jack.

5. Secure the tool to the transmission as for removal.

Important

The jack can tip over. Be careful.



6. Align the gearbox in place. Remove 87 92 574 Holder just before the gearbox is in place.

7. Slide the gearbox into contact with the mating surface. Fit the screws (A) between the engine and gearbox.

Tightening torque 70 Nm (52 lbf ft)


8. Remove the lifting tool from the gearbox and move away the jack.

9. Lower the car. Lift up the unit and fit the bolts (A) to the engine bracket according to the marks made earlier.

Tightening torque 93 Nm (69 lbf ft)


10. Remove the lifting beam and undo the lifting eyes. Fit the expansion tank in its holder.

11. Fit the upper screws (A) of the transmission casing. Use 87 92 723 Access tool, bolt in joint between automatic transmission and engine .

Tightening torque 70 Nm (52 lbf ft)


12. Fit 83 95 162 Protective collar, drive shafts (A) into the sealing ring. Lubricate the sealing ring.


13. Make sure that the drive shaft is clean and then align it with the tool.

Important

Slide in the gearbox until approx. 20 mm are remaining and remove the tool 83 95 162.


14. Push in the rest of the shaft until the circlip clicks in.

15. Attach the ABS cable to the clip (B).

16. Raise the car. Press the torque converter against the driver plate. Fit the plug.

17. Apply Thread locking adhesive, Loctite 242 to the bolts (A) holding the torque converter to the driver plate.

Note

Use the original bolts with associated washers. Using bolts that are too long will harm the torque converter.



18. Fit the 6 bolts (A) without tightening them.

19. Rotate the engine clockwise with the pulley and tighten the bolts (A) once they are all in place.

Tightening torque 60 Nm (44 lbf ft)

20. Fit the starter motor (B).

Tightening torque 47 Nm (35 lbf ft)


21. Fit the electrical connectors (A).

22. Change oil cooler hose seals if the transmission is to be refitted. Use 83 90 270 Sliding hammer , 87 92 319 Adapter, 3/8" - M10 and 87 92 756 Puller, oil pipe seal, automatic transmission .

Important

Ensure that the surfaces in the gearbox gasket opening are not damaged.


23. Fit new seals lubricated with Vaseline on the oil cooler hoses. Use 87 92 814 Fitting, oil pipe seal, automatic transmission .

24. Lubricate the pipes with Vaseline, non-acidic and attach the oil cooler hoses (A). The pipes press holes into the seals during fitting.


25. Fit the front torque rod bracket.

Tightening torque 93 Nm (69 lbf ft)


26. 4WD: Fit Transfer case, A20NFT/LHU .

27. Fasten the cable to the cable retainer by pulling back the locking sleeve (C).


28. Fit the gear cable (B) to the selector lever arm.

29. Plug in the control module connector (A).

30. Carry out Checking and adjustment, selector lever cable .

31. Fit the battery tray (A).


32. Fit the battery, the bonnet switch, the fuse box and cooling pipe.

33. Fit and connect the battery cables.

34. Fit the battery cover.

35. Fit the upper engine cover. Put back the engine dipstick.

36. Check the fluid level in the gearbox, refer to Check/adjust fluid level .

37. Remove the wing covers.

38. Carry out Measures after disconnecting the battery .

39. Test drive the car with varying engine loads and speeds and delete eventual trouble codes. Also check the position of the steering wheel when driving straight ahead on a level road. Adjust if needed.

40. Upon gearbox replacement: Carry out Adaptation, resetting. .