GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2000 🢒 Metro 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 3 Speed-M60 🢒 Stall Speed Test

Stall Speed Test Results

Road Test Results

Probable Cause

Stall Speed in All Gear Ranges Exceed Specified Limit

No 1st gear or slipping in 1st gear.

Line pressure too low.

Stall Speed in Drive (D) and Second (2) Ranges Exceed Specified Limit
  1. Slipping in 1st gear.
  2. 2nd and 3rd gear are normal.
  3. Slipping in drive (D) range 1st, 2nd and 3rd gears. Engine braking occurs with the throttle valve completely closed.
  4. Slipping in Second (2) range 1st and 2nd gears. Engine braking occurs with the throttle valve completely closed.
  1. One-way clutch slipping.
  2. One-way clutch slipping.
  3. Forward clutch.
  4. Forward clutch.

Stall Speed in Reverse (R) Range Exceeds the Specified Limit
  1. Engine braking does not function in the Low (L) range.
  2. Engine braking works in the L range
  1. 1st-reverse brake slipping.
  2. Direct clutch slipping.

Stall Speed Within Specifications
  1. Vehicle speed will not exceed 80 km/h (50 mph). This condition causes very high fluid temperatures.
  2. Slipping in drive (D) range 3rd gear.
  3. Slipping in drive (D) range in.
  1. Torque converter one-way clutch seizure.
  2. Direct clutch slipping.
  3. 2nd brake band slipping.

Stall Speed in all Ranges Exceeds Limits
  1. Poor acceleration
  2. Low Power
  1. Torque converter stator.
  2. One-way clutch slipping.
  3. Below Stall Speeds.

Use the stall speed test in order to test the overall performance of the transaxle and of the engine. The stall speed test measures the maximum engine speeds in the forward range and in the reverse range.

    Notice: This test should always be performed at a normal operating fluid temperature of 70 to 80°C (158 to 176°F). DO NOT run engine at stall speed for more than five seconds continuously. If this precaution is not observed, engine oil and transaxle fluid temperatures may rise excessively high.

  1. Connect the scan tool to the Data Link Connector (DLC), and display the engine RPM.
  2. Apply the park brake, and block the vehicle wheels.
  3. Turn the ignition switch to the ON position.
  4. Press the brake pedal completely.
  5. Verify that the manual selector lever is in the park (P) range.
  6. Start the engine.
  7. Move the manual selector lever to the drive (D) range.
  8. Press the accelerator pedal completely at Wide Open Throttle (WOT). Observe the scan tool. When the scan tool is constant, the stall speed, quickly read and record the engine speed (RPM)
  9. After the stall speed is recorded, release the accelerator pedal immediately.
  10. Using the same method, record the stall speed in Second (2), Low (L), and Reverse (R) ranges.
  11. Return the selector lever to Park (P) range, and turn the ignition switch to the LOCK position.

Evaluation

The stall speed should fall within 2300-2800 RPM in all tested gear ranges. Refer to the Stall Speed Test Diagnosis for causes of a higher stall speed or a lower stall speed.