Valve body, replacing - MINI Cooper R50, R52, R53 (aisin 6 speed automatic transmission)

Abstract: Replacing valve body, aisin 6-speed transmission

Applies to: MINI Cooper: 2002-2006 (R50, R52, R53)

• After completion of work, check transmission fluid level.

• Required fluid amount for refill after repair: 4.8 US quart (4.5 liters).

• Drain transmission fluid into a suitable container.
  -To help with refilling, make a note of drained ATF quantity.
• Remove transmission fluid pan.

• Remove transmission oil strainer (filter) fasteners, then remove strainer.

• Bend open retaining lugs (1) of hand valve lever.
  Slacken nut (2).
• Remove hand lever (3).

• Release connectors (1/2) from holders and disconnect.

• Release screw (1).
• Remove oil temperature sensor (2) with locking plate (3).

• Disconnect plugs of magnet and pressure valves.
  -Note routing of cables.

• When removing selector unit, slide in gear selector valve (1) and hold down.

• Note screws have different lengths.
  -Numbers: 4,6,10,12=28 mm.
  -Numbers: 2,3,5,7,8,11=21 mm.
  -Numbers: 1,9=16 mm.

• First release screws uniformly in specified order and then remove.
• Remove selector unit.
  Note location of cable clip and cables.

• Under the selector unit at the end of the gear selector lever is the accumulator plunger (1) with spring.
• Hold accumulator plunger (1) and spring firmly when removing selector unit.

Installing

• Moisten accumulator plunger and spring with ATF.
• Install selector unit, accumulator plunger and spring simultaneously.

• Before installing selector unit, secure cable with adhesive tape in installation location on housing.

• Insert screws slightly during installation, align selector unit and tighten down in specified order.
• Tightening torque and angle of rotation must be observed.

  Tightening Torque
  Drain plug to transmission oil pan	27 Nm (20 ft-lb)
  Oil filler plug to transmission housing	25 Nm (18.4 ft-lb)
  Oil pan to transmission	8 Nm (6 ft-lb)
  AISIN gear selector valve and oil temperature sensor	10 Nm (7.3 ft-lb)
  Valve body to transmission	8 Nm (6 ft-lb) + 90 degrees