What are some of the symptoms of the code?
Symptoms of a P2704 trouble code may include:
- Uneven handling
- Transmission slipping
- Irregular shifting
- Abnormal shifting patterns
- Harsh shift selection
- ATF (Automatic Transmission Fluid) leak
- Low torque
- Abnormal power output
What are some common causes of the code?
Causes of this P2704 friction element slipping code may include:
- Low ATF
- Worn friction element (internal)
- Dirty ATF causes
- Wiring issue (e.g., open, short, chafing, heat damage)
- Uneven tire sizes
- Issue causing uneven rotation speed/circumference (e.g., low tire pressure, stuck brake, etc.)
- TCM (Transmission Control Module) problem
- ECM (Engine Controls Module) problem
- Water damage to module and/or harness
What are the troubleshooting steps for P2704?
The first step in the troubleshooting process for any malfunction is to check technical service bulletins for known issues with the specific vehicle.
Advanced diagnostic steps become very vehicle-specific and may require appropriate advanced equipment and knowledge to operate accurately. We include the basic steps below but refer to a repair guide specific to the year/make/model/drivetrain for steps specific to your vehicle.
Basic Step #1
It is imperative that you follow basic maintenance procedures accordingly at this stage, regarding transmission health, start with the fluid. Your ATF (Automatic Transmission Fluid) should be clean, free of debris, and also, proper maintenance schedules should be followed to prevent further failures like this in the future. If you don’t remember the last time the transmission was serviced (i.e., filter + fluid + gasket), it’s a good idea to do so before proceeding. Who knows, there might be some debris in your oil that’s trapped inside. It might only take a simple service, so make sure you’re aware of the last A/T service you had done.
NOTE: ensure you’re using the correct ATF for your specific make and model.
Basic Step #2
Most likely, when trying to locate the connector/harness for this system, you’ll need to find a junction connector. There might be a “master” connector, so make sure you’re working with the correct one by referring to your manual. Ensure the connector itself is properly installed to ensure a good electrical connection. When the connector is located on the A/T, it may be subject to vibrations that could loosen connections or physically damage them. Not to mention, the possibility of ATF saturating the connectors and wires causing future or current issues.
Basic Step #3
It’s always wise to know the overall condition of your vehicle. Since, as in this case, other systems can directly affect other systems. Uneven tires, worn suspension parts, incorrect wheels, all of these can and will cause issues in this system and possibly others, so even things get messed up, and you might get rid of this code.
This article is strictly for informational purposes only, and technical data and service bulletins for your specific vehicle should always take precedence.