Contents Section: Automatic Trans All sections

Overhaul: Overview Subaru Impreza GD/GC/GG рестайлинг

Automatic Trans 31 illustrations ~1284 words

Scheme 94

Scheme 94: TORQUE CONVERTER CLUTCH

Scheme 95

Scheme 95: OIL PUMP

Scheme 96

Scheme 96: TRANSMISSION CONTROL ELEMENT

Scheme 97

Scheme 97: TRANSMISSION GEAR RATIO

Scheme 98

Scheme 98: PLANETARY GEAR AND PLATE

Scheme 99

Scheme 99: SELECTOR POSITION

Scheme 100

Scheme 100: HYDRAULIC CONTROL AND LUBRICATION

Scheme 101

Scheme 101: COOLING AND HARNESS

Scheme 102

Scheme 102: TRANSFER

Scheme 103

Scheme 103: FINAL REDUCTION

Scheme 104

Scheme 104: TORQUE CONVERTER CLUTCH AND CASE

Tightening Torques: N.m (kgf-m, ft-lb)

  1. T1: 18 (1.8, 13.0)
  2. T2: 41 (4.2, 30.4)
  3. T3: 44 (4.5, 32.5)

Scheme 105

Scheme 105: OIL PUMP

Tightening Torques: N.m (kgf-m, ft-lb)

  1. T1: 7 (0.7, 5.1)
  2. T2: 13 (1.3, 9.4)
  3. T3: 18 (1.8, 13.0)
  4. T4: 25 (2.5, 18.1)
  5. T5: 40 (4.1, 30)
  6. T6: 42 (4.3, 31)
  7. T7: 116 (11.8, 85)

Scheme 106

Scheme 106: TRANSMISSION CASE AND CONTROL DEVICE

Tightening Torques: N.m (kgf-m, ft-lb)

  1. T1: 3.4 (0.35, 2.5)
  2. T2: 5 (0.5, 3.6)
  3. T3: 6 (0.6, 4)
  4. T4: 8 (0.8, 6)
  5. T5: 12 (1.2, 8.7)
  6. T6: 13 (1.3, 10)
  7. T7: 14 (1.4, 10)
  8. T8: 18 (1.8, 13)
  9. T9: 25 (2.6, 18)
  10. T10: 44 (4.5, 32)

Scheme 107

Scheme 107: CONTROL VALVE AND HARNESS ROUTING

Tightening Torques: N.m (kgf-m, ft-lb)

  1. T1: 7 (0.7, 5.1)
  2. T2: 8 (0.8, 5.8)

Scheme 108

Scheme 108: HIGH CLUTCH AND REVERSE CLUTCH

Scheme 109

Scheme 109: PLANETARY GEAR AND 2-4 BRAKE

Scheme 110

Scheme 110: LOW CLUTCH AND LOW & REVERSE BRAKE

Tightening Torques: N.m (kgf-m, ft-lb)

  1. T: 25 (2.5, 18.1)

Scheme 111

Scheme 111: REDUCTION GEAR (MPT)

Tightening Torques: N.m (kgf-m, ft-lb)

  1. T: 100 (10.2, 73.8)

Scheme 112

Scheme 112: REDUCTION GEAR (VTD)

Tightening Torques: N.m (kgf-m, ft-lb)

  1. T: 100 (10.2, 73.8)

Scheme 113

Scheme 113: DIFFERENTIAL GEAR

Tightening Torques: N.m (kgf-m, ft-lb)

  1. T1: 25 (2.5, 18.1)
  2. T2: 65 (6.3, 45.6)

Scheme 114

Scheme 114: TRANSFER AND EXTENSION CASE (MPT)

Tightening Torques: N.m (kgf-m, ft-lb)

  1. T1: 7 (0.7, 5.1)
  2. T2: 8 (0.8, 5.8)

Scheme 115

Scheme 115: TRANSFER AND EXTENSION CASE (VTD)

Tightening Torques: N.m (kgf-m, ft-lb)

  1. T1: 7 (0.7, 5.1)
  2. T2: 13 (1.3, 9.4)
  3. T3: 25 (2.5, 18.1)

Scheme 116

Scheme 116: TRANSMISSION MOUNTING

Tightening Torques: N.m (kgf-m, ft-lb)

  1. T1: 35 (3.6, 26)
  2. T2: 39 (4.0, 29)
  3. T3: 50 (5.1, 37)
  4. T4: 58 (5.9, 43)
  5. T5: 70 (7.1, 51)

ENGINE BRAKE OPERATION

  1. Check the engine braking effect in 3rd gear by shifting between D <=> 3 range while driving in 4th gear of D range [50 to 60 km/h (31 to 37 MPH)].
  2. Check the engine braking effect in 2nd gear by shifting between 3 <=> 2 range while driving in 3rd gear of 3 range [40 to 50 km/h (25 to 31 MPH)].
  3. Check the engine braking effect in 1st gear by shifting between 2 <=> 1 range while driving in 2nd gear of 2 range [20 to 30 km/h (12 to 19 MPH)].

P RANGE OPERATION

Stop the vehicle on an uphill grade of 5% or more and shift to "P" range. Check that the vehicle does not move when the parking brake is released.

GENERAL DESCRIPTION

The stall test is extremely important for diagnosing the condition of the automatic transmission and the engine. It should be conducted to measure the engine stall speeds in "R" and "2" ranges.

Purposes of the stall test

  1. To check the operation of the automatic transmission clutch.
  2. To check the operation of the torque converter clutch.
  3. To check engine performance.

Scheme 117

Scheme 117: TEST METHODS
  1. Preparations before test: Check that throttle valve is wide open. Check that engine oil level is correct. Check that coolant level is correct. Check that ATF level is correct. Check that differential gear oil level is correct. Increase ATF temperature to 70 to 80°C (158 to 176°F) by idling the engine for approximately 30 minutes (with select lever set to "N" or "P").
  2. Place the wheel chocks at the front and rear of all wheels and engage the parking brake.
  3. Move the manual linkage to ensure it operates properly, and shift the select lever to the "2" range.
  4. While forcibly depressing the foot brake pedal, gradually depress the accelerator pedal until the engine operates at full throttle.
  5. As soon as the engine speed stabilizes, record the speed and release the accelerator pedal.
  6. Shift the select lever to "N" range, and cool down the engine by idling it for more than one minute.
  7. If the stall speed in 2 range is higher than specified, low clutch slipping and 2-4 brake slipping may occur. To identify this, conduct the same test as above in "R" range.
  8. Perform the stall tests with the select lever in "D" range.

Note. Do not continue the stall test for MORE THAN 5 SECONDS at a time (from closed throttle, wide open throttle to stall speed reading). Failure to follow this instruction causes the engine oil and ATF to deteriorate and the clutch and brake to be adversely affected. Be sure to cool down the engine for at least 1 minute after each stall test with the select lever set in the "P" or "N" range and with the idle speed lower than 1,200 rpm. If the stall speed is higher than the specified range, attempt to finish the stall test in as a short time as possible, in order to prevent the automatic transmission from sustaining damage.

Stall speed (at sea level)

  1. Non-turbo model: 2,100 - 2,600 rpm
  2. Turbo model: 2,600 - 3,400 rpm

Scheme 118

Scheme 118: EVALUATION

If the select lever is shifted while the engine is idling, there will be a certain time elapse or lag before the shock can be felt. This is used for checking the condition of the low clutch, reverse clutch, low & reverse brake and one-way clutch.

CAUTIONPerform the test at normal operating fluid temperature 70 to 80°C (158 to 176°F). Be sure to allow a 1 minute interval between tests. Make three measurements and take the average value.

If the clutch or the brake shows a sign of slippage or shift feel is not correct, the line pressure should be checked.

  1. Excessive shocks during upshifting or shifting takes place at a higher point than under normal circumstances, may be due to the line pressure being too high.
  2. Slippage or inability to operate the vehicle may, in most cases, be due to loss of oil pressure for the operation of the clutch, brake or control valve.
  1. Line pressure measurement (under no load) CAUTION: Before measuring the line pressure, jack-up all wheels. Maintain the temperature of ATF at approximately 50°C (122°F) during measurement. ATF will reach the above temperature after idling the engine for approximately 30 minutes with select lever in "N" or "P").
  2. Line pressure measurement (under heavy load) CAUTION: Before measuring the line pressure, apply both foot and parking brakes with all wheels chocked (same as for stall test conditions). Measure the line pressure when select lever is in "R", "2" with engine under stall conditions. Measure the line pressure within 5 seconds after shifting the select lever to each position (If line pressure needs to be measured again, allow the engine to idle, and then stop it. Wait at least 1 minute before taking measurements). Maintain the temperature of ATF at approx.50°C (122°F) during measurement (ATF will reach the above temperature after idling the engine for approx.30 minutes with select lever in "N" or "P").

Scheme 119

Scheme 119: TEST METHODS

Scheme 120

Scheme 120

Scheme 121

Scheme 121
  1. Temporarily attach the ST to a suitable place in the driver's compartment, remove the blind plug located in front of the toe board and pass the hose of the ST to engine compartment. ST 498575400 OIL PRESSURE GAUGE ASSY
  2. Remove the test plug and install the ST instead. ST 498897200 OIL PRESSURE GAUGE ADAPTER
  3. Connect the ST1 with ST2. ST1 498897200 OIL PRESSURE GAUGE ADAPTER ST2 498575400 OIL PRESSURE GAUGE ASSY
  4. Check for duty ratio changes by opening and closing the throttle valve using Subaru Select Monitor. Insert the cartridge into Subaru Select Monitor. See «PREPARATION TOOL»(ref-174973-S10537245842005041300000) , General Description. Connect the Subaru Select Monitor to data link connector.
  5. Check the line pressure in accordance with the following chart.

Scheme 122

Scheme 122: EVALUATION

Scheme 123

Scheme 123: TEST METHODS

Scheme 124

Scheme 124
  1. MPT model Check the transfer clutch pressure in accordance with the following chart in the same manner as with line pressure. See «LINE PRESSURE TEST»(ref-174973-S01410768352005041300000) . ST 498897700 OIL PRESSURE ADAPTER SET ST 498575400 OIL PRESSURE GAUGE ASSY AWD mode: "D" range FWD mode: "P" range, engine speed 2,000 rpm CAUTION: Before setting in FWD mode, install the spare fuse on FWD mode switch.
  2. VTD model Check the transfer clutch pressure in accordance with the following chart in the same manner as with line pressure. ST 498897700 OIL PRESSURE ADAPTER SET ST 498575400 OIL PRESSURE GAUGE ASSY