Engine-CodesFord – P0735 Ford

P0735 Ford Code - Incorrect Fifth Gear Ratio

Quick Answer

The P0735 code for Ford vehicles indicates that there is an incorrect fifth gear ratio detected. Common causes include Worn or damaged gear synchronizers, Low transmission fluid levels or contaminated fluid, Malfunctioning shift solenoids. 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 Ford indicates Incorrect Fifth Gear Ratio.
Common causes
Common causes include Worn or damaged gear synchronizers, Low transmission fluid levels or contaminated fluid, Malfunctioning shift solenoids.
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.
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P0735 Ford Description

The P0735 code for Ford vehicles indicates that there is an incorrect fifth gear ratio detected. This means that the transmission is not shifting into fifth gear properly, leading to potential issues with the vehicle's performance. The transmission control module (TCM) monitors the gear ratio to ensure smooth shifting and optimal performance. When the TCM detects that the actual gear ratio does not match the expected gear ratio for fifth gear, it triggers the P0735 code.

OBDII Code P0735 Ford - Incorrect Fifth Gear Ratio
P0735 Ford Code - Incorrect Fifth Gear Ratio

Common Causes of P0735 Ford

  1. Worn or damaged gear synchronizers
  2. Low transmission fluid levels or contaminated fluid
  3. Malfunctioning shift solenoids
  4. Faulty TCM or transmission sensors
  5. Mechanical issues with the transmission gears or components

Symptoms of P0735 Ford

  1. Delayed or harsh shifting between gears
  2. Slipping transmission, especially when trying to shift into fifth gear
  3. Engine revving higher than usual without a corresponding increase in speed
  4. Illumination of the Check Engine Light on the dashboard
  5. Decreased fuel efficiency

How to Fix P0735 Ford

  1. Begin by checking the transmission fluid level and quality. If low or dirty, perform a fluid flush and fill to the proper level.
  2. Inspect the gear synchronizers and gears for wear or damage. Replace any faulty components.
  3. Test the shift solenoids and TCM for proper operation. Replace any defective parts.
  4. Clear the fault codes from the TCM's memory and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, consult a professional mechanic for a more in-depth diagnosis and repair.

Cost to Fix P0735 Ford

The typical repair costs for addressing the P0735 code can vary depending on the specific cause of the issue. In general, the cost can range from $200 to $800, including parts and labor. However, it's essential to note that the actual repair costs may be higher or lower based on factors such as the vehicle's make and model, the extent of the damage, and the labor rates at the auto repair shop. It's recommended to obtain a detailed estimate from a trusted mechanic before proceeding with the repair.

Tech Notes for P0735 Ford

Start by inspecting the transmission fluid level and condition, and change fluid if necessary.

When is the Code Detected?

Transmission in fifth gear and the ECM detected an incorrect gear ration

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0735 Ford Code

No Frequently Asked Questions about P0735 Ford Code found.

Discuss the causes and fixes for P0735 Ford OBDII Code

  • Ford 500 limited 2006 when I get up to about 68 do not want to pull it jumps out of gear get off the gas and get back on it easy and gold code p0735