P0730 on Jeep
Incorrect Gear Ratio
P0730 on Jeep vehicles indicates incorrect gear ratio. Au7o has documented this code across 6 Jeep models — most commonly on Commander, Compass, Gladiator. 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 Jeep range from $200 to $6,500, 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 Jeep by Model
Jeep Commander(1 issue)
- Transmission Overheating / Control Module Failure2006-2010
The Commander frequently displays "Transmission Over Temp" warnings even when fluid level and condition are normal. The transmission control module (TCM) and powertrain control module (PCM) are prone to failure, causing the vehicle to stall, shift erratically, or enter limp mode. NHTSA Campaign 08V203000 addressed TCM issues, but many owners report the repairs did not fully resolve the problem. Over 216 powertrain complaints filed for the 2006 model year alone.
Jeep Compass(2 issues)
- 9-Speed Automatic Transmission Rough Shifting2017-2025
The ZF 9HP48 9-speed automatic transmission in second-generation Compass models suffers from rough shifting, delayed engagement, hunting for gears, and jerky low-speed operation. Approximately 30% of owners report transmission issues within 100,000 miles per Consumer Reports data. The transmission control module software often struggles with shift logic at low speeds.
- Jatco CVT Transmission Failure / Overheating2007-2017
First-generation Compass models (2007-2017) equipped with the Jatco CVT2 continuously variable transmission suffer from overheating, slipping, shuddering, and premature failure. The CVT fluid breaks down under heat stress, causing the pulleys to wear and the belt to slip. Overheating is especially common in hot weather, stop-and-go traffic, or when towing. "Transmission Over Temp" warnings are extremely common.
Jeep Gladiator(2 issues)
- Manual Transmission Clutch Overheating / Fire Risk2020-2024
Vehicles equipped with the 6-speed manual transmission may experience clutch pressure plate overheating, which can cause the pressure plate to fracture and crack the transmission case. Heated debris can contact ignition sources, creating a fire risk. NHTSA Recall 20V-124 (Manufacturer W12) initially covered 2018-2020 models; expanded recall 23V-116 covered 2021-2024 models. Some underhood fires have been reported while parked.
- Automatic Transmission Stalling / Auto-Park Engagement2020-2023
The 8-speed automatic transmission (8HP75) can stall at low speeds, causing the vehicle to unexpectedly shift into park and apply the emergency brake. Related to the eTorque mild-hybrid system on 3.6L V6 equipped models. NHTSA opened a probe covering 2022 models with 5.7L eTorque Hemi V8, but 3.6L models also affected. Owners report inability to restart after stalling.
Jeep Grand Wagoneer(1 issue)
- ZF 8-speed (8HP) harsh shifting / delayed engagement (software/adaptation issues)2022-2024
Owner reports and NHTSA complaints describe harsh 1-2/2-1 shifts, clunks on takeoff, and delayed engagement into Drive/Reverse on Grand Wagoneer equipped with the ZF 8-speed automatic. Many cases are addressed through transmission control software updates and adaptation resets, suggesting calibration/adaptation sensitivity rather than hard-part failure in a large share of vehicles.
Jeep Patriot(1 issue)
- Jatco CVT Transmission Overheating / Failure2007-2014
The Jatco CVT2 continuously variable transmission is the single biggest reliability problem on the Patriot. The CVT overheats frequently, especially in hot weather, stop-and-go traffic, or on hills. When the fluid breaks down from heat, the pulleys wear and the steel belt slips, leading to complete transmission failure. "Transmission Over Temp" and limp mode are extremely common complaints. In 2014, Jeep dropped the CVT in favor of a 6-speed automatic on most trims.
Jeep Wrangler(1 issue)
- Manual Transmission Clutch Issues (JL)2018-2023
The JL Wrangler with manual transmission can experience clutch issues including premature wear, judder, and difficulty engaging gears. Some owners report clutch failures at relatively low mileage, particularly with off-road or aggressive driving.
Looking for P0730 on a different make?
View P0730 across all makes →Frequently Asked Questions
What does P0730 mean on Jeep?▼
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 Jeep specifically, this code is documented across 6 models.
What causes P0730 on Jeep vehicles?▼
Common causes on Jeep: 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 Jeep?▼
Repair costs on Jeep range from $200 to $6,500, depending on the specific model and root cause.
Which Jeep models have P0730 documented?▼
Au7o has documented P0730 on 6 Jeep models: Commander, Compass, Gladiator, Grand Wagoneer, Patriot, Wrangler.