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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 813 (Automatic Transmission - 4L80-E/4L85-E (Service & Replacement)) >> Diagnostic Information and Procedures >> DTC P0730: Incorrect Transmission Gear Ratio >> Test Description

Test Description

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The numbers below refer to the step numbers on the diagnostic table.

  1. 3. This step tests the indicated range signal to the actual selected range. A faulty TFP manual valve position switch could set DTC P1810.
  2. 4. This step tests for correct ratios in each commanded gear.
    Fig 1: Diagnostic Trouble Code (DTC P0730) Table (1-6)
    G02112018Courtesy of GENERAL MOTORS CORP.
    Fig 2: Diagnostic Trouble Code (DTC P0730) Table (7-9)
    G02112019Courtesy of GENERAL MOTORS CORP.
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