2012 Subaru Outback Base, Automatic CVT TransFACTORY OEM SERVICE PROCEDURE

2.5 L Model

Item Specification
Vehicle model AT and CVT MT
Starter Type Reduction type
Model 428000-4790 428000-4780
Manufacturer DENSO
Voltage and output 12 V - 1.6 kW
Direction of rotation Counterclockwise (when observed from pinion)
Number of pinion teeth 9
No-load characteristics Voltage 11 V
Current 90 A or less
Rotating speed 1, 900 RPM or more
Load characteristics Voltage 8 V
Current 370 A
Torque 11.1 N.m (1.1 kgf-m, 8.2 ft-lb) or more
Rotating speed 910 RPM or more
Lock characteristics Voltage 3 V
Current 750 A or less
Torque 15.5 N.m (1.6 kgf-m, 11.4 ft-lb) or more
Generator Type Rotating-field three-phase type, voltage regulator built-in type, with load response control system
Model A3TG6191
Manufacturer MITSUBISHI ELECTRIC
Voltage and output 12 V - 110 A
Polarity on ground side Negative
Direction of rotation Clockwise (when observed from pulley side)
Armature connection 3-phase Y-type
Output current 1, 500 RPM - 50 A or more
2, 500 RPM - 91 A or more
5, 000 RPM - 105 A or more
Regulated voltage 14.1 - 14.8 V [20Β°C (68Β°F)]
Rotor slip ring outer diameter Standard 22.7 mm (0.894 in)
Limit 22.1 mm (0.870 in)
Brush length Standard 18.5 mm (0.728 in)
Limit 5.0 mm (0.197 in)
Battery Type and capacity 12 V - 52 AH (75D 23R)
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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