P0735 2018 GMC Sierra Code - Transmission 5th Gear Ratio Incorrect
Quick Answer
The P0735 diagnostic trouble code (DTC) indicates that the transmission's fifth gear ratio is incorrect. Common causes include Worn or damaged gears or clutches, Faulty transmission solenoid, Low or contaminated transmission fluid. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0735 2018 GMC Sierra indicates Transmission 5th Gear Ratio Incorrect.
- Common causes
- Common causes include Worn or damaged gears or clutches, Faulty transmission solenoid, Low or contaminated transmission fluid.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0735 2018 GMC Sierra Description
The P0735 diagnostic trouble code (DTC) indicates that the transmission's fifth gear ratio is incorrect. In an automatic transmission, gears are responsible for controlling the speed and torque of the vehicle. The fifth gear ratio being incorrect means that there is a discrepancy between the transmission's input and output speeds in fifth gear. This can lead to various issues such as poor fuel efficiency, rough shifting, loss of power, and potential damage to the transmission components.
Common Causes of P0735 2018 GMC Sierra
- Worn or damaged gears or clutches
- Faulty transmission solenoid
- Low or contaminated transmission fluid
- Malfunctioning transmission control module
- Electrical issues within the transmission system
Symptoms of P0735 2018 GMC Sierra
- Rough or delayed shifting between gears
- Slipping or jerking when accelerating in fifth gear
- Check Engine Light illuminated on the dashboard
- Reduced fuel efficiency
- In some cases, the vehicle may go into limp mode to prevent further damage
How to Fix P0735 2018 GMC Sierra
- Begin by conducting a thorough diagnostic scan to confirm the P0735 code and identify any other related issues.
- Inspect the transmission fluid level and quality. If it is low or contaminated, perform a transmission fluid flush and refill.
- Check for any visible damage to the gears or clutches. Replace any worn components as necessary.
- Test the transmission solenoid for proper function and replace if faulty.
- If all components appear to be in good condition, perform a relearn procedure to reset the transmission control module and clear the code.
Cost to Fix P0735 2018 GMC Sierra
The cost of repairing a transmission with an incorrect fifth gear ratio can vary depending on the extent of the damage and the specific components that need to be replaced. On average, this type of repair can range from $500 to $1500, including parts and labor. However, it's important to note that diagnosis time and labor rates can vary, so it's recommended to get a detailed quote from a reputable auto repair shop based on your vehicle's make and model. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing.
Tech Notes for P0735 2018 GMC Sierra
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