23 00 027 Removing and installing transmission (GS6-53BG) (N18)

WARNING: This page is about a different car, the 2016 MINI Cooper Paceman, 2015 MINI Cooper Paceman, 2014 MINI Cooper Paceman, and 2013 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

Necessary preliminary work:

Disconnect BATTERY .
Secure engine in INSTALLATION POSITION .
Drain off transmission oil.
Remove TRANSMISSION SUPPORT BRACKET
Remove TRANSMISSION MOUNT .
Remove FRONT AXLE SUPPORT .
No wheel alignment is required for removal and installation of front axle support.
Remove TRANSFER BOX (PTO)
Remove LEFT OUTPUT SHAFT only at transmission end and hang up.
Remove RIGHT OUTPUT SHAFT only at transmission end and hang up.

IMPORTANT: Bending the drive shaft by an excessive angle can cause premature damage to the joints/drive shaft!

Release clips on stop/holder (1).

Detach selector lever cable (2) from ball joint.

Release screw (3) and remove bracket.

Fig 1: Identifying Selector Lever Cable, Holder And Screw

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Disconnect plug (1) for reversing light switch.

Fig 2: Identifying Reversing Light Switch Plug

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Disconnect plug connection (1) on zero gear sensor.

Detach cable (2) with holder from transmission.

Fig 3: Identifying Zero Gear Sensor Plug Connection And Cable

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NOTE: Pressure line of clutch slave cylinder remains connected.

IMPORTANT: Slowly relieve tension on clutch slave cylinder otherwise air may be drawn in through sealing sleeve.
If possible, do not deflect push rod of clutch slave cylinder.
A deflection of the push rod caused by removal will cause easy escape of fluid. This escape of fluid does not mean that the clutch slave cylinder is damaged.
Replacement is therefore not necessary!

Fig 4: Identifying Clutch Slave Cylinder Nuts

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Release nuts (1) and remove clutch slave cylinder.

Tightening torque 21 52 2AZ .

Release screws (1).

Release holder (2) from engine.

Fig 5: Identifying Holder And Screws

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Undo starter bolt (1) SW13 from above.

Release bolts (2) and remove starter.

Tightening torque 12 41 1AZ .

Fig 6: Identifying Starter Bolts And WAF 13 Bolt

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Supporting transmission:

With special tools 23 4 150 and 00 2 030

Support transmission from underneath.

Secure transmission with tensioning strap (3).

Tasks are described in TRANSMISSION BRACKET .

After completion of work, check transmission fluid level.

Fig 7: Supporting Transmission Using Special Tools (23 4 150) And (00 2 030)

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NOTE: A bracket is fitted at the lowest point (1) of the gearbox.

Release screws.

Remove transmission.

Tightening torque 23 00 1AZ .

IMPORTANT: Do not allow transmission to hang on transmission input shaft when removing and installing, as the clutch disc will be deformed.
Pull out transmission and remove.

Fig 8: Locating Transmission Screws

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Installation note:

Check dowel sleeves (1) and (2) for correct seating.

Replace damaged fitting sleeves.

Fig 9: Identifying Dowel Sleeves

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Installation note:

Remove grease from transmission input shaft and clean shaft.

Do not grease transmission input shaft.

Check clutch disc for friction rust in gearing and REPLACE if necessary.

Fig 10: Locating Transmission Input Shaft

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Installation note:

If reusing the clutch:
Mechanically remove existing grease and lining abrasion from gearings of clutch disc (with a cloth).

Clean clutch hub and regrease.

In new clutch discs the gearing is already greased.

Refer to OPERATING FLUIDS
Remove and clean RELEASE BEARING AND RELEASE LEVER
Add transmission fluid.