P0730 on Chrysler
Incorrect Gear Ratio
P0730 on Chrysler vehicles indicates incorrect gear ratio. Au7o has documented this code across 2 Chrysler models — most commonly on 300, Pacifica. This code means the transmission computer detected that the actual gear ratio (calculated from input vs. output shaft speeds) does not match what it should be for the commanded gear. In other words, the transmission isn't delivering the correct gear, which often shows up as slipping, flaring RPM during shifts, or being stuck in the wrong gear. It can stem from internal mechanical wear, low or contaminated fluid, or faulty solenoids and sensors. The vehicle may shift harshly or enter limp mode. Typical repair costs on Chrysler range from $5 to $8,000, depending on the specific model and root cause.
Common Causes of P0730
- •Low or contaminated transmission fluid
- •Worn clutches or bands (internal slipping)
- •Faulty shift solenoids
- •Dirty or sticking valve body
- •Faulty input or output speed sensor
- •Internal hydraulic/line pressure problems
- •Torque converter problems
- •General high-mileage transmission wear
P0730 on Chrysler by Model
Chrysler 300(1 issue)
- Shifter Clip Failure - Vehicle Stuck in Park2005-2010
A small plastic clip in the shifter mechanism breaks, causing the vehicle to become stuck in Park. Known design flaw in the first-generation LX platform vehicles. The clip is inexpensive but causes a completely disabled vehicle when it fails. Emergency brake override button near shifter can bypass the issue temporarily.
Chrysler Pacifica(2 issues)
- Hybrid Transmission Wiring Harness Short (PHEV)2017-2023
Internal transmission wiring connectors in PHEV models can short circuit, causing unexpected engine shutdown while driving. The low-voltage wiring harness within the transmission develops shorts, causing the gas engine to shut down and the vehicle to go into limp mode or lose motive power entirely. Recall 03A / NHTSA 23V010 issued.
- Transmission Harsh 3-4 Shift and Shudder (9-Speed)2017-2025
The ZF 9HP 9-speed automatic transmission in the Pacifica exhibits harsh or jerky 3-4 shifts, shuddering during light throttle acceleration at 25-40 mph, and occasional hesitation when downshifting. The 9-speed has had multiple software calibration updates since launch, and the adaptive learning can become confused by varied driving patterns. Cold weather worsens the harsh shifting. The issue persists across multiple model years despite ongoing TSBs.
Looking for P0730 on a different make?
View P0730 across all makes →Frequently Asked Questions
What does P0730 mean on Chrysler?▼
P0730 stands for "Incorrect Gear Ratio." This code means the transmission computer detected that the actual gear ratio (calculated from input vs. output shaft speeds) does not match what it should be for the commanded gear. In other words, the transmission isn't delivering the correct gear, which often shows up as slipping, flaring RPM during shifts, or being stuck in the wrong gear. It can stem from internal mechanical wear, low or contaminated fluid, or faulty solenoids and sensors. The vehicle may shift harshly or enter limp mode. On Chrysler specifically, this code is documented across 2 models.
What causes P0730 on Chrysler vehicles?▼
Common causes on Chrysler: Low or contaminated transmission fluid, Worn clutches or bands (internal slipping), Faulty shift solenoids, Dirty or sticking valve body, Faulty input or output speed sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0730 on a Chrysler?▼
Repair costs on Chrysler range from $5 to $8,000, depending on the specific model and root cause.
Which Chrysler models have P0730 documented?▼
Au7o has documented P0730 on 2 Chrysler models: 300, Pacifica.