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Home >> Lexus >> 2000 >> SC 300 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission Overhaul >> Performance Tests >> Time Lag Test >> Test Procedure
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Test Procedure

  1. Engine and transmission must be at normal operating temperature. Start engine and check idle speed with transmission in Neutral with A/C off. Ensure idle speed is 650-750 RPM.
  2. Apply service and parking brakes. Using stop watch, measure time until engagement shock is felt when selector lever is shifted from "N" to "D". Allow one minute interval between tests. Perform time measurements 2 more times and calculate average value. Time should be less than 1.2 seconds.
  3. Use same procedure to test time lag when selector lever is moved from "N" to "R". Time lag should be less than 1.5 seconds.