24 30 011 Removing and installing/replacing hydraulic shift unit (AISIN F21FT)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2019 MINI Cooper, 2018 MINI Cooper, 2017 MINI Cooper, 2016 MINI Cooper, and 2015 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT:

After completion of work, check TRANSMISSION OIL LEVEL .

Note the amount of released automatic transmission fluid.

Use only the approved TRANSMISSION OIL .

Otherwise the automatic transmission may incur extensive damage!

Do not drain oil before the transmission has cooled down.

Necessary preliminary tasks:

Disconnect NEGATIVE BATTERY CABLE .
Drain off TRANSMISSION OIL .
Remove LEFT CHARGE AIR DUCT .
Remove FAN COWL .
Remove RADIATOR .
Remove CHARGE AIR COOLER .
Remove the EGS .

Removal:

Release screws and remove cover.

Fig 1: Locating Hydraulic Shift Unit Cover Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Remove locking plates (2) with oil temperature sensors (3).

Fig 2: Locking Plates, Screws, And Oil Temperature Sensors

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect connectors of solenoid and control valves.

Fig 3: Locating Connectors

Courtesy of BMW OF NORTH AMERICA, INC.

Attention !

Pay attention to routing of cables.

Release output speed sensor connector (1) from bracket and place to one side.

Attention !

Observe connector (1) installation position.

Fig 4: Locating Output Speed Sensor Connector

Courtesy of BMW OF NORTH AMERICA, INC.

Attention !

Screws have different lengths.

Numbers: 3, 4, 6, 7, 8 = 21 mm.

Numbers: 2, 5 = 31 mm. Number: 1 = 51 mm.

Evenly release screws in specified sequence.

Fig 5: Hydraulic Shift Unit Screws Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 6: Gear Selector Valve And Selector Unit Location

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect lever (1) from gearshift shaft.

When removing selector unit, slide in gear selector valve (2) and hold down.

Remove selector unit.

Installation:

Join shift unit to transmission.

Pull gear selector valve (2) slightly out of shift unit.

Insert lever (1) into gearshift shaft.

Fig 7: Gear Selector Valve And Selector Unit Location

Courtesy of BMW OF NORTH AMERICA, INC.

Attention !

Screws have different lengths.

Numbers: 1, 2, 3, 5, 6 = 21 mm.

Numbers: 4, 7 = 31 mm.

Number: 8 = 51 mm.

Fig 8: Hydraulic Shift Unit Screws Tightening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Attention !

Insert screws slightly during installation, align selector unit and tighten down in specified order.

Tightening torque: 24 30 2AZ .

Fig 9: Hydraulic Shift Unit Screws Tightening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Clip in output speed sensor connector (1) onto bracket.

Fig 10: Locating Output Speed Sensor Connector

Courtesy of BMW OF NORTH AMERICA, INC.

Install oil temperature sensors (3) with locking plates (2) and screw.

Tightening torque: 24 30 3AZ .

Attention !

Coat the gaskets with automatic transmission fluid.

Fig 11: Locking Plates, Screws, And Oil Temperature Sensors

Courtesy of BMW OF NORTH AMERICA, INC.

Connect and lock connectors of the solenoid and control valves.

Fig 12: Locating Connectors

Courtesy of BMW OF NORTH AMERICA, INC.

Parts: Replace the screws, cover and liquid sealing compound.

Clean sealing surface of transmission and completely remove the sealing compound.

Apply new liquid sealing compound.

Install cover and screw.

Fig 13: Locating Hydraulic Shift Unit Cover Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque: 24 30 1AZ .

Required follow-up work:

Add TRANSMISSION OIL .