24 00 023 Removing and installing automatic transmission (GA6HP26Z) (M57T2)
Special tools required:
If there are signs of corrosion, the rust must be removed and the threads must be cleaned before removal .
Replace rusted, damaged screws.
Failure to comply with this instruction will result in serious damage to the engine block and transmission.
Use only the approved transmission oil. See AUTOMATIC TRANSMISSION -- OPERATING FLUIDS or DUAL-CLUTCH TRANSMISSION -- OPERATING FLUIDS .
Failure to comply with this requirement will result in serious damage to the automatic transmission!
Necessary preliminary tasks:
- Clamp off battery . See 12 00... NOTES FOR DISCONNECTING AND CONNECTING BATTERY or 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD .
- Remove EXHAUST SYSTEM .
- Remove heat shields
- Remove FRONT PROPELLER SHAFT .
- REMOVE propeller shaft from transmission.
- Release center mount.
- Note:
- Bending the propeller shaft by an excessive angle can cause premature damage to the joint/propeller shaft!
- Tie up propeller shaft to underbody.
- Support engine with lifter when removing transmission.
Unfasten nut.
Disconnect cable (1).
Installation note:
- Unfasten nut.
- Adjust cable by means of holder (2) until spacing A ≥ 1 mm is obtained.
- Tighten nut.
Slacken nut (1).
Detach line (2) from rubber mount.
Vehicles with Adaptive Drive:
Remove guard plate (1).
Slacken nut (1).
Detach line (2) with rubber mount from holder.
Release screw (1).
Detach rubber mount (2) with line (3) from holder.
Detach line (1) from front axle.
Release screw (1).
Disconnect hydraulic lines (2) to transmission oil cooler.
Installation note:
Replace sealing rings.
- Unlock connector (1) by turning and disconnect
- Release cable from brackets
- Insert special tool 24 2 390 in sealing cup.
These tasks are described in NOTES ON MECHATRONICS .
(Important: Observe important note)
Insert special tool 24 1 370 into recess of transmission housing and secure with screw (1).
Lug (2) must point in opposite direction to direction of travel.
Release screw on exhaust turbocharger.
Tightening torque: 18 32 2AZ .
Remove V-clamp (1).
Installation note:
V-clamp must be replaced each time it is opened.
Replace gasket.
Release bolts (1) of the suspension diesel particulate filter.
Tightening torque: 18 20 2AZ .
Release screws (2) from holder and remove.
Tightening torque: 18 20 3AZ .
Lay diesel particulate filter to one side.
If necessary remove cable for oxygen sensor and exhaust-gas temperature sensor from holder.
Release screw (1).
Remove panel (2).
Crank engine at vibration damper with special tool 11 6 480 in direction of rotation until bolt (1) is visible in recess.
Release all 4 bolts of torque converter with special tool 24 1 110 .
Tightening torque: 24 40 1AZ .
Replace diesel particulate filter to initial position for lowering the gearbox. Do not screw.
Supporting transmission:
Support transmission with special tools 23 4 050 , 00 2 030 .
Secure transmission to mounting with tensioning strap (1).
Tasks are described in GEARBOX HOLDER .
After completion of work, check transmission fluid level.
Unlock and detach connectors (1) and (2).
Release screws.
Tightening torque: 22 32 4AZ .
Release screw (1).
Tightening torque: 22 32 5AZ .
Remove cross member.
Before the transmission is unflanged, the entire assembly must be supported with a second jack!
Release screws.
Tightening torque: 24 00 1AZ .
Unflange transmission.
Installation note:
Bore hole (1) of driving plate must be accessible from recess on engine oil sump.
Check that fitting sleeves are correctly fitted.
Replace damaged fitting sleeves.
Installation note:
Rotate torque converter until bore hole in torque converter is flush with bore hole in driving plate.
Flange automatic transmission to engine.