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Home >> Buick >> 1992 >> Roadmaster Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Overhaul & Testing - 700-R4/4L60 >> Torque Converter >> Stall Test
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Stall Test

  1. Torque converter whine is usually noticed when vehicle is stopped and transmission is in Reverse or Drive. Whine will increase when engine RPM is increased and will stop when vehicle is moving or when torque converter clutch is applied. Stall test is to ensure whine is coming from torque converter.
  2. Start engine, and allow it to reach normal operating temperature. Apply parking and service brakes. Put transmission in Drive. Depress accelerator to approximately 1200 RPM for less than 6 seconds. DO NOT  depress accelerator for more than 6 seconds or transmission damage may occur. Torque converter noise will increase under this load.
NOTE: Torque converter whine should not be confused with pump whine, which is usually noticeable in Park, Neutral and all other gear ranges.
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