Automatic Transmission System Mechanical System Tests

Drivetrain. Land Cruiser. Urj200, 202 Grj200 Vdj200
Ae80F Automatic Transmission Transaxle. Land Cruiser. Urj200, 202 Grj200 Vdj200

  1. STALL SPEED TEST

  1. SHIFT TIME LAG TEST

Automatic Transmission System -- Mechanical System Tests



STALL SPEED TEST
HINT:
This test is to check the overall performance of the engine and transmission.
CAUTION:
  1. This test should be done on a paved surface (a surface that is not slippery).
  2. To ensure safety, perform this test in an open and level area that provides good traction.
  3. The stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.
NOTICE:
  1. Do not perform the stall speed test for longer than 5 seconds.
  2. When performing the stall speed test more than once, make sure to wait 15 seconds or more between tests.
  3. Perform this test with the ATF (Automatic Transmission Fluid) at the normal operating temperature: 50 to 80°C (122 to 176°F)

  1. Connect the GTS to the DLC3.

  2. Drive the vehicle until the transmission fluid temperature has reached 50 to 80°C (122 to 176°F).

  3. Allow the engine to idle with the air conditioning and headlights off.

  4. Chock all 4 wheels.

  5. Set the parking brake and keep the brake pedal depressed firmly with your left foot.

  6. Move the shift lever to D.

  7. Depress the accelerator pedal as much as possible with your right foot.

  8. Read the engine speed (stall speed) and release the accelerator pedal immediately.

    Standard Value:
    Stall Speed
    2350 rpm
    		+ 200 rpm
    - 200 rpm

    Evaluation
    Test Result
    		Possible Cause
    Stall speed is lower than standard value
    1. Engine power output may be insufficient
    2. Stator one-way clutch not operating properly
    HINT:
    If the value is less than the specified value by 600 rpm or more, the torque converter could be faulty.
    Stall speed is higher than standard value
    1. Line pressure is too low
    2. Forward multiple clutch (C1) slipping
    3. No. 1 one-way clutch (F1) is not operating properly
    4. Improper fluid level

SHIFT TIME LAG TEST
HINT:
When the shift lever is moved while the engine is idling, there will be a certain time lapse or lag before shock can be felt. This is used for checking the condition of the clutch and brake.

  1. Connect the GTS to the DLC3.

  2. Drive the vehicle until the transmission fluid temperature has reached 50 to 80°C (122 to 176°F).

  3. Allow the engine to idle with the air conditioning off.

  4. Set the parking brake and keep the brake pedal depressed firmly.

  5. Check the D position time lag.

    1. Move the shift lever to N and wait for 1 minute.

    2. Move the shift lever to D and measure the time until shock is felt.

    3. Repeat the 2 steps above 3 times, and calculate the average time of the 3 tests.

  6. Check the R position time lag.

    1. Move the shift lever to N and wait for 1 minute.

    2. Move the shift lever to R and measure the time until shock is felt.

    3. Repeat the 2 steps above 3 times, and calculate the average time of the 3 tests.

      Standard value:
      D position time lag is less than 1.0 second
      R position time lag is less than 1.2 seconds

      Evaluation
      Test Result
      		Possible Cause
      D position time lag exceeds standard value
      1. Line pressure is low
      2. Forward multiple clutch (C1) is worn
      3. No. 1 one-way clutch (F1) is not operating properly
      R position time lag exceeds standard value
      1. Line pressure is low
      2. No. 3 clutch (C3) is worn
      3. No. 2 brake (B2) is worn