P0730 — Incorrect Gear Ratio

P0730 means the transmission's measured gear ratio doesn't match the gear it commanded. Low fluid and worn clutch packs are the two ends of the cost spectrum here.

Cost range: $150–$4,000. Severity: high. Safe to drive? No for distance. Continued driving with slipping clutches accelerates internal damage.

Most common causes of P0730

  1. Low or burnt transmission fluid — Always check first — smell and colour tell you a lot. ($150–$400)
  2. Failed shift solenoid — Transmission never fully engages the commanded gear. ($300–$900)
  3. Worn clutch packs or bands — Slipping under load; needs a rebuild. ($2,000–$4,000)
  4. Failing torque converter — Slip shows up as a ratio error. ($800–$2,500)

Symptoms drivers report with P0730