P0730 – Incorrect Gear Ratio

Description

The transmission gear ratio does not match expected values.

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Symptoms

  • Harsh shifting
  • Poor acceleration
  • Slipping
  • Limp mode
  • Check engine light

Causes

  • Low transmission fluid
  • Worn clutches
  • Faulty solenoid
  • TCM issue
  • ECU issue

Diagnosis

  • Check fluid level
  • Inspect solenoids
  • Scan live data
  • Inspect clutches
  • Inspect TCM

Repair

  • Refill fluid
  • Replace solenoids
  • Repair clutches
  • Replace TCM
  • Update ECU

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